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December 31,

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Document And Entity Information - shares	6 Months Ended
Document And Entity Information - shares	Jun. 30, 2017	Jul. 24, 2017
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2017
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	Q2
Entity Registrant Name	AQUA AMERICA INC
Entity Central Index Key	0000078128
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		177,651,543

Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Assets
Property, plant and equipment, at cost	$ 6,717,832	$ 6,509,117
Less: accumulated depreciation	1,558,681	1,507,502
Net property, plant and equipment	5,159,151	5,001,615
Current assets:
Cash and cash equivalents	7,811	3,763
Accounts receivable and unbilled revenues, net	98,890	97,394
Inventory, materials and supplies	16,838	12,961
Prepayments and other current assets	13,009	12,804
Assets held for sale	1,543	1,728
Total current assets	138,091	128,650
Regulatory assets	1,003,808	948,647
Deferred charges and other assets	33,597	30,845
Investment in joint venture	6,786	7,026
Goodwill	42,266	42,208
Total assets	6,383,699	6,158,991
Stockholders' equity:
Common stock at $.50 par value, authorized 300,000,000 shares, issued 180,635,368 and 180,311,345 as of June 30, 2017 and December 31, 2016	90,317	90,155
Capital in excess of par value	802,799	797,513
Retained earnings	1,075,856	1,032,844
Treasury stock, at cost, 2,984,264 and 2,916,969 shares as of June 30, 2017 and December 31, 2016	(73,206)	(71,113)
Accumulated other comprehensive income	764	669
Total stockholders' equity	1,896,530	1,850,068
Long-term debt, excluding current portion	1,844,342	1,759,962
Less: debt issuance costs	21,761	22,357
Long-term debt, excluding current portion, net of debt issuance costs	1,822,581	1,737,605
Commitments and contingencies (See Note 13)
Current liabilities:
Current portion of long-term debt	143,567	150,671
Loans payable	67,456	6,535
Accounts payable	46,376	59,872
Accrued interest	17,007	18,367
Accrued taxes	18,858	25,607
Other accrued liabilities	39,283	40,484
Total current liabilities	332,547	301,536
Deferred credits and other liabilities:
Deferred income taxes and investment tax credits	1,339,583	1,269,253
Customers' advances for construction	91,131	91,843
Regulatory liabilities	244,613	250,635
Other	105,051	115,583
Total deferred credits and other liabilities	1,780,378	1,727,314
Contributions in aid of construction	551,663	542,468
Total liabilities and equity	$ 6,383,699	$ 6,158,991

Consolidated Balance Sheets (Parenthetical) - $ / shares	Jun. 30, 2017	Dec. 31, 2016
Consolidated Balance Sheets [Abstract]
Common stock, par value	$ 0.50	$ 0.50
Common stock, shares authorized	300,000,000	300,000,000
Common stock, shares issued	180,635,368	180,311,345
Treasury stock, shares	2,984,264	2,916,969

Consolidated Statements Of Net Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Consolidated Statements Of Net Income [Abstract]
Operating revenues	$ 203,418	$ 203,876	$ 391,205	$ 396,483
Operating expenses:
Operations and maintenance	70,853	73,994	139,981	147,535
Depreciation	33,407	31,619	67,244	63,764
Amortization	127	528	316	978
Taxes other than income taxes	14,419	14,242	29,156	28,382
Total operating expenses	118,806	120,383	236,697	240,659
Operating income	84,612	83,493	154,508	155,824
Other expense (income):
Interest expense, net	21,387	20,115	42,713	39,968
Allowance for funds used during construction	(3,463)	(1,871)	(6,656)	(4,179)
Gain on sale of other assets	(10)	(121)	(279)	(328)
Equity loss in joint venture	161	229	191	478
Income before income taxes	66,537	65,141	118,539	119,885
Provision for income taxes	5,569	5,515	8,499	8,522
Net income	$ 60,968	$ 59,626	$ 110,040	$ 111,363
Net income per common share:
Basic	$ 0.34	$ 0.34	$ 0.62	$ 0.63
Diluted	$ 0.34	$ 0.33	$ 0.62	$ 0.63
Average common shares outstanding during the period:
Basic	177,609	177,288	177,545	177,196
Diluted	178,045	178,084	178,042	177,920
Cash dividends declared per common share	$ 0.1913	$ 0.178	$ 0.3826	$ 0.356

Consolidated Statements Of Comprehensive Income - USD ($)
$ in Thousands

3 Months Ended

6 Months Ended

Jun. 30, 2017

Jun. 30, 2016

Jun. 30, 2017

Jun. 30, 2016

Consolidated Statements Of Comprehensive Income [Abstract]

Net income

$ 60,968

$ 59,626

$ 110,040

$ 111,363

Other comprehensive income, net of tax:

Unrealized holding gain on investments, net of tax expense of $20 and $7 for the three months and $51 and $3 for the six months ended June 30, 2017 and 2016, respectively

Reclassification of gain on sale of investment to net income, net of tax of $30 for the six months ended June 30, 2016

^[1]

(57)

Comprehensive income

$ 61,005

$ 59,638

$ 110,135

$ 111,312

[1]	Amount of pre-tax gain of $87 reclassified from accumulated other comprehensive income to gain on sale of other assets on the consolidated statements of net income for the six months ended June 30, 2016.

Consolidated Statements Of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Consolidated Statements Of Comprehensive Income [Abstract]
Income taxes arising from net unrealized holding gain on investments	$ 20	$ 7	$ 51	$ 3
Income tax benefit arising from reclassification adjustment for loss reported in net income				30
Pre-tax loss of reclassification adjustment for loss reported in net income				$ 87

Consolidated Statements Of Capitalization - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Stockholders' equity:
Common stock, $.50 par value	$ 90,317	$ 90,155
Capital in excess of par value	802,799	797,513
Retained earnings	1,075,856	1,032,844
Treasury stock, at cost	(73,206)	(71,113)
Accumulated other comprehensive income	764	669
Total stockholders' equity	1,896,530	1,850,068
Long-term debt:
Long-term debt of subsidiaries	1,221,882	1,247,224
Total long-term debt	1,987,909	1,910,633
Current portion of long-term debt	143,567	150,671
Long-term debt, excluding current portion	1,844,342	1,759,962
Less: debt issuance costs	21,761	22,357
Long-term debt, excluding current portion, net of debt issuance costs	1,822,581	1,737,605
Total capitalization	3,719,111	3,587,673
Long-Term Debt Of Subsidiaries 0.00% To 0.99% [Member]
Long-term debt:
Long-term debt of subsidiaries	4,339	4,661
Long-Term Debt Of Subsidiaries 1.00% To 1.99% [Member]
Long-term debt:
Long-term debt of subsidiaries	13,664	15,539
Long-Term Debt Of Subsidiaries 2.00% To 2.99% [Member]
Long-term debt:
Long-term debt of subsidiaries	20,120	19,668
Long-Term Debt Of Subsidiaries 3.00% To 3.99% [Member]
Long-term debt:
Long-term debt of subsidiaries	430,600	381,944
Long-Term Debt Of Subsidiaries 4.00% To 4.99% [Member]
Long-term debt:
Long-term debt of subsidiaries	422,896	487,318
Long-Term Debt Of Subsidiaries 5.00% To 5.99% [Member]
Long-term debt:
Long-term debt of subsidiaries	205,828	213,078
Long-Term Debt Of Subsidiaries 6.00% To 6.99% [Member]
Long-term debt:
Long-term debt of subsidiaries	52,995	52,985
Long-Term Debt Of Subsidiaries 7.00% To 7.99% [Member]
Long-term debt:
Long-term debt of subsidiaries	32,706	33,066
Long-Term Debt Of Subsidiaries 8.00% To 8.99% [Member]
Long-term debt:
Long-term debt of subsidiaries	6,334	6,565
Long-Term Debt Of Subsidiaries 9.00% To 9.99% [Member]
Long-term debt:
Long-term debt of subsidiaries	26,400	26,400
Long-Term Debt Of Subsidiaries 10.00% To 10.99% [Member]
Long-term debt:
Long-term debt of subsidiaries	6,000	6,000
Revolving Credit Agreement, Due 2021 [Member]
Long-term debt:
Notes payable to bank under revolving credit agreement, variable rate, due 2017	135,000	25,000
Bank notes at 1.921% and 1.975% due 2017 and 2018 [Member]
Long-term debt:
Unsecured notes payable	100,000	100,000
Notes ranging from 3.01% to 3.59% due 2027 through 2041 [Member]
Long-term debt:
Unsecured notes payable	245,000	245,000
Notes Ranging From 4.62% To 4.87%, due 2017 through 2024 [Member]
Long-term debt:
Unsecured notes payable	133,600	133,600
Notes Ranging From 5.20% To 5.95%, due 2018 through 2037 [Member]
Long-term debt:
Unsecured notes payable	$ 152,427	$ 159,809

Consolidated Statements Of Capitalization (Parenthetical) - $ / shares	6 Months Ended	12 Months Ended
	Jun. 30, 2017	Dec. 31, 2016
Common stock, par value	$ 0.50	$ 0.50
Long-Term Debt Of Subsidiaries 10.00% To 10.99% [Member]
Maturity date	2018	2018
Revolving Credit Agreement, Due 2021 [Member]
Maturity date	2021	2021
Bank notes at 1.921% due 2017 [Member]
Interest rate	1.921%	1.921%
Maturity date	2017	2017
Bank notes at 1.975% due 2018 [Member]
Interest rate	1.975%	1.975%
Maturity date	2018	2018
Notes at 3.01% due 2027 [Member]
Interest rate	3.01%	3.01%
Maturity date	2027	2027
Notes at 3.59% due 2041 [Member]
Interest rate	3.59%	3.59%
Maturity date	2041	2041
Minimum [Member] \| Long-Term Debt Of Subsidiaries 0.00% To 0.99% [Member]
Interest rate	0.00%	0.00%
Maturity date	2023	2023
Minimum [Member] \| Long-Term Debt Of Subsidiaries 1.00% To 1.99% [Member]
Interest rate	1.00%	1.00%
Maturity date	2019	2019
Minimum [Member] \| Long-Term Debt Of Subsidiaries 2.00% To 2.99% [Member]
Interest rate	2.00%	2.00%
Maturity date	2024	2024
Minimum [Member] \| Long-Term Debt Of Subsidiaries 3.00% To 3.99% [Member]
Interest rate	3.00%	3.00%
Maturity date	2019	2019
Minimum [Member] \| Long-Term Debt Of Subsidiaries 4.00% To 4.99% [Member]
Interest rate	4.00%	4.00%
Maturity date	2020	2020
Minimum [Member] \| Long-Term Debt Of Subsidiaries 5.00% To 5.99% [Member]
Interest rate	5.00%	5.00%
Maturity date	2019	2019
Minimum [Member] \| Long-Term Debt Of Subsidiaries 6.00% To 6.99% [Member]
Interest rate	6.00%	6.00%
Maturity date	2017	2017
Minimum [Member] \| Long-Term Debt Of Subsidiaries 7.00% To 7.99% [Member]
Interest rate	7.00%	7.00%
Maturity date	2022	2022
Minimum [Member] \| Long-Term Debt Of Subsidiaries 8.00% To 8.99% [Member]
Interest rate	8.00%	8.00%
Maturity date	2021	2021
Minimum [Member] \| Long-Term Debt Of Subsidiaries 9.00% To 9.99% [Member]
Interest rate	9.00%	9.00%
Maturity date	2018	2018
Minimum [Member] \| Long-Term Debt Of Subsidiaries 10.00% To 10.99% [Member]
Interest rate	10.00%	10.00%
Minimum [Member] \| Notes Ranging From 4.62% To 4.87%, due 2017 through 2024 [Member]
Interest rate	4.62%	4.62%
Maturity date	2017	2017
Minimum [Member] \| Notes Ranging From 5.20% To 5.95%, due 2018 through 2037 [Member]
Interest rate	5.20%	5.20%
Maturity date	2018	2018
Maximum [Member] \| Long-Term Debt Of Subsidiaries 0.00% To 0.99% [Member]
Interest rate	0.99%	0.99%
Maturity date	2033	2033
Maximum [Member] \| Long-Term Debt Of Subsidiaries 1.00% To 1.99% [Member]
Interest rate	1.99%	1.99%
Maturity date	2035	2035
Maximum [Member] \| Long-Term Debt Of Subsidiaries 2.00% To 2.99% [Member]
Interest rate	2.99%	2.99%
Maturity date	2033	2033
Maximum [Member] \| Long-Term Debt Of Subsidiaries 3.00% To 3.99% [Member]
Interest rate	3.99%	3.99%
Maturity date	2056	2056
Maximum [Member] \| Long-Term Debt Of Subsidiaries 4.00% To 4.99% [Member]
Interest rate	4.99%	4.99%
Maturity date	2054	2054
Maximum [Member] \| Long-Term Debt Of Subsidiaries 5.00% To 5.99% [Member]
Interest rate	5.99%	5.99%
Maturity date	2043	2043
Maximum [Member] \| Long-Term Debt Of Subsidiaries 6.00% To 6.99% [Member]
Interest rate	6.99%	6.99%
Maturity date	2036	2036
Maximum [Member] \| Long-Term Debt Of Subsidiaries 7.00% To 7.99% [Member]
Interest rate	7.99%	7.99%
Maturity date	2027	2027
Maximum [Member] \| Long-Term Debt Of Subsidiaries 8.00% To 8.99% [Member]
Interest rate	8.99%	8.99%
Maturity date	2025	2025
Maximum [Member] \| Long-Term Debt Of Subsidiaries 9.00% To 9.99% [Member]
Interest rate	9.99%	9.99%
Maturity date	2026	2026
Maximum [Member] \| Long-Term Debt Of Subsidiaries 10.00% To 10.99% [Member]
Interest rate	10.99%	10.99%
Maximum [Member] \| Notes Ranging From 4.62% To 4.87%, due 2017 through 2024 [Member]
Interest rate	4.87%	4.87%
Maturity date	2024	2024
Maximum [Member] \| Notes Ranging From 5.20% To 5.95%, due 2018 through 2037 [Member]
Interest rate	5.95%	5.95%
Maturity date	2037	2037

Consolidated Statement Of Equity - 6 months ended Jun. 30, 2017 - USD ($) $ in Thousands	Common Stock [Member]	Capital In Excess Of Par Value [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income [Member]	Total
Balance at Dec. 31, 2016	$ 90,155	$ 797,513	$ 1,032,844	$ (71,113)	$ 669	$ 1,850,068
Net income			110,040			110,040
Other comprehensive income, net of income tax of $51					95	95
Dividends			(67,920)			(67,920)
Sale of stock (23,194 shares)	12	703				715
Repurchase of stock (67,295 shares)				(2,093)		(2,093)
Equity compensation plan (160,279 shares)	80	(80)
Exercise of stock options (140,550 shares)	70	2,257				2,327
Stock-based compensation		2,810	(90)			2,720
Cumulative effect of change in accounting principle - windfall tax benefit			982			982
Other		(404)				(404)
Balance at Jun. 30, 2017	$ 90,317	$ 802,799	$ 1,075,856	$ (73,206)	$ 764	$ 1,896,530

Consolidated Statement Of Equity (Parenthetical) $ in Thousands	6 Months Ended
	Jun. 30, 2017 USD ($) shares
Consolidated Statement Of Equity (Parenthetical) [Abstract]
Other Comprehensive income, net of income tax \| $	$ 51
Sale of stock, shares	23,194
Repurchase of stock, shares	67,295
Equity compensation plan, shares	160,279
Exercise of stock options, shares	140,550

Consolidated Statements Of Cash Flow - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Cash flows from operating activities:
Net income	$ 110,040	$ 111,363
Adjustments to reconcile net income to net cash flows from operating activities:
Depreciation and amortization	67,560	64,742
Deferred income taxes	6,299	5,051
Provision for doubtful accounts	2,052	2,101
Stock-based compensation	2,810	2,200
Loss (gain) on sale of utility system and market-based business unit	324	(1,782)
Gain on sale of other assets	(279)	(328)
Net change in receivables, inventory and prepayments	(7,417)	(4,130)
Net change in payables, accrued interest, accrued taxes and other accrued liabilities	(10,969)	(2,695)
Postretirement benefit contributions	(15,421)	(6,787)
Other	2,262	7,923
Net cash flows from operating activities	157,261	177,658
Cash flows from investing activities:
Property, plant and equipment additions, including the debt component of allowance for funds used during construction of $1,543 and $1,097	(208,472)	(168,587)
Acquisitions of utility systems and other, net	(5,765)	(5,626)
Net proceeds from the sale of utility system and other assets	1,102	6,439
Other	(144)	(45)
Net cash flows used in investing activities	(213,279)	(167,819)
Cash flows from financing activities:
Customers' advances and contributions in aid of construction	3,629	3,205
Repayments of customers' advances	(1,774)	(1,282)
Net proceeds of short-term debt	60,921	9,518
Proceeds from long-term debt	222,780	169,297
Repayments of long-term debt	(145,499)	(112,650)
Change in cash overdraft position	(12,616)	(15,338)
Proceeds from issuing common stock	715	670
Proceeds from exercised stock options	2,327	3,569
Stock-based compensation windfall tax benefits		1,198
Repurchase of common stock	(2,093)	(2,859)
Dividends paid on common stock	(67,920)	(63,071)
Other	(404)	(402)
Net cash flows from (used in) financing activities	60,066	(8,145)
Net change in cash and cash equivalents	4,048	1,694
Cash and cash equivalents at beginning of period	3,763	3,229
Cash and cash equivalents at end of period	7,811	4,923
Non-cash investing activities:
Property, plant and equipment additions purchased at the period end, but not yet paid for	32,770	20,863
Non-cash customer advances and contributions in aid of construction	$ 11,488	$ 11,199

Consolidated Statements Of Cash Flow (Parenthetical) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Consolidated Statements Of Cash Flow [Abstract]
Debt component of allowance for funds used during construction	$ 1,543	$ 1,097

Basis Of Presentation	6 Months Ended
Basis Of Presentation	Jun. 30, 2017
Basis Of Presentation [Abstract]
Basis Of Presentation	Note 1 – Basis of Presentation The accompanying consolidated balance sheets and statements of capitalization of Aqua America, Inc. and subsidiaries (the “Company”) at June 30, 2017, the consolidated statements of net income and comprehensive income for the three and six months ended June 30, 2017 and 2016 the consolidated statements of cash flow for the six months ended June 30, 2017 and 2016, and the consolidated statement of equity for the six months ended June 30, 2017 are unaudited, but reflect all adjustments, consisting of only normal recurring accruals, which are, in the opinion of management, necessary to present a fair statement of our consolidated financial position, consolidated changes in equity, consolidated results of operations, and consolidated cash flow for the periods presented. Because they cover interim periods, the statements and related notes to the financial statements do not include all disclosures and notes normally provided in annual financial statements and, therefore, should be read in conjunction with the Company’s Annual Report on Form 10-K for the year ended December 31, 2016. The results of operations for interim periods may not be indicative of the results that may be expected for the entire year. The December 31, 2016 consolidated balance sheet data presented herein was derived from the Company’s December 31, 2016 audited consolidated financial statements, but does not include all disclosures and notes normally provided in annual financial statements. Certain prior period amounts have been reclassified to conform to the current period presentation of postretirement benefit contributions in the consolidated statements of cash flows. The preparation of financial statements often requires the selection of specific accounting methods and policies. Further, significant estimates and judgments may be required in selecting and applying those methods and policies in the recognition of the assets and liabilities in our consolidated balance sheets, the revenues and expenses in our consolidated statements of net income, and the information that is contained in our summary of significant accounting policies and notes to consolidated financial statements. Making these estimates and judgments requires the analysis of information concerning events that may not yet be complete and of facts and circumstances that may change over time. Accordingly, actual amounts or future results can differ materially from those estimates that we include currently in our consolidated financial statements, summary of significant accounting policies, and notes. There have been no changes to the summary of significant accounting policies previously identified in the Company’s Annual Report on Form 10-K for the year ended December 31, 2016.

Goodwill

6 Months Ended

Jun. 30, 2017

Goodwill [Abstract]

Goodwill

Note 2 – Goodwill

The following table summarizes the changes in the Company’s goodwill, by business segment:



	Regulated
	Segment		Other		Consolidated
Balance at December 31, 2016	$	37,367	$	4,841	$	42,208
Goodwill acquired		72		-		72
Reclassification to utility plant acquisition adjustment		(14)		-		(14)
Balance at June 30, 2017	$	37,425	$	4,841	$	42,266

The reclassification of goodwill to utility plant acquisition adjustment results from a mechanism approved by the applicable utility commission. The mechanism provides for the transfer over time, and the recovery through customer rates, of goodwill associated with some acquisitions upon achieving specific objectives.

- Definition

The entire disclosure for the aggregate amount of goodwill and a description of intangible assets, which may include (a) for amortizable intangible assets (also referred to as finite-lived intangible assets), the carrying amount, the amount of any significant residual value, and the weighted-average amortization period, (b) for intangible assets not subject to amortization (also referred to as indefinite-lived intangible assets), the carrying amount, and (c) the amount of research and development assets acquired and written off in the period, including the line item in the income statement in which the amounts written off are aggregated, if not readily apparent from the income statement. Also discloses (a) for amortizable intangibles assets in total and by major class, the gross carrying amount and accumulated amortization, the total amortization expense for the period, and the estimated aggregate amortization expense for each of the five succeeding fiscal years, (b) for intangible assets not subject to amortization the carrying amount in total and by major class, and (c) for goodwill, in total and for each reportable segment, the changes in the carrying amount of goodwill during the period (including the aggregate amount of goodwill acquired, the aggregate amount of impairment losses recognized, and the amount of goodwill included in the gain (loss) on disposal of a reporting unit). If any part of goodwill has not been allocated to a reportable segment, discloses the unallocated amount and the reasons for not allocating. For each impairment loss recognized related to an intangible asset (excluding goodwill), discloses: (a) a description of the impaired intangible asset and the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method for determining fair value, (c) the caption in the income statement or the statement of activities in which the impairment loss is aggregated, and (d) the segment in which the impaired intangible asset is reported. For each goodwill impairment loss recognized, discloses: (a) a description of the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method of determining the fair value of the associated reporting unit, and (c) if a recognized impairment loss is an estimate not finalized and the reasons why the estimate is not final. May also disclose the nature and amount of any significant adjustments made to a previous estimate of an impairment loss.

+ References + Details

Acquisitions	6 Months Ended
Acquisitions	Jun. 30, 2017
Acquisitions [Abstract]
Acquisitions	Note 3 – Acquisitions During the first half of 2017, the Company completed three acquisitions of water and wastewater utility systems in various states adding 1,002 customers. The total purchase price of these utility systems consisted of $5,765 in cash, which resulted in $72 of goodwill being recorded. The pro forma effect of the businesses acquired is not material either individually or collectively to the Company’s results of operations. Pursuant to our strategy to grow through acquisitions, in January 2016, the Company acquired Superior Water Company, Inc., which provides public water service to approximately 3,900 customers in portions of Berks, Chester, and Montgomery counties in Pennsylvania. The total purchase price for the utility system was $16,750, which consisted of the issuance of 439,943 shares of the Company’s common stock and $3,905 in cash. The purchase price allocation for this acquisition consisted primarily of acquired property, plant and equipment of $25,167, contributions in aid of construction of $16,565, and goodwill of $8,622. Additionally, during 2016, the Company completed eighteen acquisitions of water and wastewater utility systems in various states adding 2,469 customers. The total purchase price of these utility systems consisted of $5,518 in cash, which resulted in $1,756 of goodwill being recorded. The pro forma effect of the businesses acquired is not material either individually or collectively to the Company’s results of operations.

Assets Held For Sale	6 Months Ended
Assets Held For Sale	Jun. 30, 2017
Assets Held For Sale [Abstract]
Assets Held For Sale	Note 4 – Assets Held for Sale In the first quarter of 2017, the Company decided to market for sale a water system that serves approximately 265 customers. This water system is reported as assets held for sale in the Company’s consolidated balance sheet. In the second quarter of 2016, the Company decided to market for sale two business units that are reported within the Company’s market-based subsidiary, Aqua Resources. One business unit installed and tested devices that prevent the contamination of potable water and repaired water and wastewater systems, for which the sale was completed in January 2017. The other business unit repairs and performs maintenance on water and wastewater systems, for which the sale was completed in June 2017.

Capitalization

6 Months Ended

Jun. 30, 2017

Capitalization [Abstract]

Capitalization

Note 5 – Capitalization

In July 2017, Aqua Illinois issued $100,000 of first mortgage bonds consisting of the following:

\
Amount	Interest Rate	Maturity
$25,000	3.64%	2032
$6,000	3.89%	2037
$15,000	3.90%	2038
$10,000	4.18%	2047
$22,000	4.22%	2049
$22,000	4.24%	2050

The proceeds from these bonds were used to repay existing indebtedness and for general corporate purposes.

In July 2017, Aqua Pennsylvania issued $80,000 of first mortgage bonds, of which $40,000 is due in 2055 and $40,000 is due in 2057 with interest rates of 4.04% and 4.06%, respectively. The proceeds from these bonds were used to repay existing indebtedness and for general corporate purposes.

In January 2017, Aqua Pennsylvania issued $50,000 of first mortgage bonds, of which $10,000 is due in 2042 and $40,000 is due in 2044 with interest rates of 3.65% and 3.69%, respectively. The proceeds from these bonds were used to repay existing indebtedness and for general corporate purposes.

Fair Value Of Financial Instruments

6 Months Ended

Jun. 30, 2017

Fair Value Of Financial Instruments [Abstract]

Fair Value Of Financial Instruments

Note 6 – Fair Value of Financial Instruments

The Company follows the Financial Accounting Standards Board’s (“FASB”) accounting guidance for fair value measurements and disclosures, which defines fair value and establishes a framework for using fair value to measure assets and liabilities. That framework provides a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. The hierarchy gives highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). The three levels of the fair value hierarchy are as follows:

Level 1: unadjusted quoted prices in active markets for identical assets or liabilities that the Company has the ability to access;

Level 2: inputs other than Level 1 that are observable, either directly or indirectly, such as quoted market prices in active markets for similar assets or liabilities, quoted prices for identical or similar assets or liabilities in non-active markets, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities; or

Level 3: inputs that are unobservable and significant to the fair value measurement.

The asset’s or liability’s fair value measurement level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement. Valuation techniques used need to maximize the use of observable inputs and minimize the use of unobservable inputs. There have been no changes in the valuation techniques used to measure fair value, or asset or liability transfers between the levels of the fair value hierarchy for the quarter ended June 30, 2017.

Financial instruments are recorded at carrying value in the financial statements and approximate fair value as of the dates presented. The fair value of these instruments is disclosed below in accordance with current accounting guidance related to financial instruments.

The fair value of loans payable is determined based on its carrying amount and utilizing Level 1 methods and assumptions. As of June 30, 2017 and December 31, 2016, the carrying amount of the Company’s loans payable was $67,456 and $6,535, respectively, which equates to their estimated fair value. The fair value of mutual funds to fund our deferred compensation plan liability is determined based on quoted market prices from active markets utilizing Level 1 methods and assumptions. As of June 30, 2017 and December 31, 2016, the carrying amount of these securities was $18,000 and $17,072, which equates to their fair value, and is reported in the consolidated balance sheet in deferred charges and other assets. The fair value of cash and cash equivalents, which is comprised of a money market fund, is determined based on the net asset value per unit utilizing Level 2 methods and assumptions. As of June 30, 2017 and December 31, 2016, the carrying amounts of the Company's cash and cash equivalents was $7,811 and $3,763, respectively, which equates to their fair value.

The carrying amounts and estimated fair values of the Company’s long-term debt is as follows:

The fair value of long-term debt has been determined by discounting the future cash flows using current market interest rates for similar financial instruments of the same duration utilizing Level 2 methods and assumptions. The Company’s customers’ advances for construction have a carrying value of $91,131 as of June 30, 2017, and $91,843 as of December 31, 2016. Their relative fair values cannot be accurately estimated because future refund payments depend on several variables, including new customer connections, customer consumption levels, and future rate increases. Portions of these non-interest bearing instruments are payable annually through 2027 and amounts not paid by the respective contract expiration dates become non-refundable. The fair value of these amounts would, however, be less than their carrying value due to the non-interest bearing feature.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Net Income Per Common Share

6 Months Ended

Jun. 30, 2017

Net Income Per Common Share [Abstract]

Net Income Per Common Share

Note 7 – Net Income per Common Share

Basic net income per common share is based on the weighted average number of common shares outstanding. Diluted net income per common share is based on the weighted average number of common shares outstanding and potentially dilutive shares. The dilutive effect of employee stock-based compensation is included in the computation of diluted net income per common share. The dilutive effect of stock-based compensation is calculated using the treasury stock method and expected proceeds upon exercise or issuance of the stock-based compensation. The treasury stock method assumes that the proceeds from stock-based compensation are used to purchase the Company’s common stock at the average market price during the period. The following table summarizes the shares, in thousands, used in computing basic and diluted net income per common share:



	Three Months Ended		Six Months Ended
	June 30,		June 30,
	2017	2016	2017	2016
Average common shares outstanding during the period for basic computation	177,609	177,288	177,545	177,196
Dilutive effect of employee stock-based compensation	436	796	497	724
Average common shares outstanding during the period for diluted computation	178,045	178,084	178,042	177,920

For the three and six months ended June 30, 2017 and 2016, all of the Company’s employee stock options were included in the calculations of diluted net income per share as the calculated cost to exercise the stock options was less than the average market price of the Company’s common stock during these periods.

Stock-Based Compensation

6 Months Ended

Jun. 30, 2017

Stock-Based Compensation [Abstract]

Stock-Based Compensation

Note 8 – Stock-based Compensation

Under the Company’s 2009 Omnibus Equity Compensation Plan, as amended as of February 27, 2014 (the “2009 Plan”), as approved by the Company’s shareholders to replace the 2004 Equity Compensation Plan (the “2004 Plan”), stock options, stock units, stock awards, stock appreciation rights, dividend equivalents, and other stock-based awards may be granted to employees, non-employee directors, and consultants and advisors. The 2009 Plan authorizes 6,250,000 shares for issuance under the plan. A maximum of 3,125,000 shares under the 2009 Plan may be issued pursuant to stock awards, stock units and other stock-based awards, subject to adjustment as provided in the 2009 Plan. During any calendar year, no individual may be granted (i) stock options and stock appreciation rights under the 2009 Plan for more than 500,000 shares of Company stock in the aggregate or (ii) stock awards, stock units or other stock-based awards under the 2009 Plan for more than 500,000 shares of Company stock in the aggregate, subject to adjustment as provided in the 2009 Plan. Awards to employees and consultants under the 2009 Plan are made by a committee of the Board of Directors of the Company, except that with respect to awards to the Chief Executive Officer, the committee recommends those awards for approval by the non-employee directors of the Board of Directors. In the case of awards to non-employee directors, the Board of Directors makes such awards. At June 30, 2017, 3,741,035 shares were still available for issuance under the 2009 Plan. No further grants may be made under the 2004 Plan.

Performance Share Units – A performance share unit (“PSU”) represents the right to receive a share of the Company’s common stock if specified performance goals are met over the three-year performance period specified in the grant, subject to exceptions through the respective vesting period, generally three years. Each grantee is granted a target award of PSUs, and may earn between 0% and 200% of the target amount depending on the Company’s performance against the performance goals. The following table provides compensation costs for stock-based compensation related to PSUs:



	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2017		2016		2017		2016
Stock-based compensation within operations and maintenance expenses	$	971	$	967	$	1,841	$	1,492
Income tax benefit		394		392		747		601

The following table summarizes the PSU transactions for the six months ended June 30, 2017:



	Number	Weighted
	of	Average
	Share Units	Fair Value
Nonvested share units at beginning of period	476,896	$	27.96
Granted	125,202		30.79
Performance criteria adjustment	(64,034)		27.75
Forfeited	(12,915)		28.01
Share units vested in prior period and issued in current period	32,400		25.31
Share units issued	(125,999)		36.37
Nonvested share units at end of period	431,550	$	26.16

A portion of the fair value of PSUs was estimated at the grant date based on the probability of satisfying the market-based conditions using the Monte Carlo valuation method, which assesses probabilities of various outcomes of market conditions. The other portion of the fair value of the PSUs is based on the fair market value of the Company’s stock at the grant date, regardless of whether the market-based condition is satisfied. The per unit weighted-average fair value at the date of grant for PSUs granted during the six months ended June 30, 2017 and 2016 was $30.79 and $28.89, respectively. The fair value of each PSU grant is amortized monthly into compensation expense on a straight-line basis over their respective vesting periods, generally 36 months. The accrual of compensation costs is based on our estimate of the final expected value of the award, and is adjusted as required for the portion based on the performance-based condition. The Company assumes that forfeitures will be minimal, and recognizes forfeitures as they occur, which results in a reduction in compensation expense. As the payout of the PSUs includes dividend equivalents, no separate dividend yield assumption is required in calculating the fair value of the PSUs. The recording of compensation expense for PSUs has no impact on net cash flows.

Restricted Stock Units – A restricted stock unit (“RSU”) represents the right to receive a share of the Company’s common stock. RSUs are eligible to be earned at the end of a specified restricted period, generally three years, beginning on the date of grant. The Company assumes that forfeitures will be minimal, and recognizes forfeitures as they occur, which results in a reduction in compensation expense. As the payout of the RSUs includes dividend equivalents, no separate dividend yield assumption is required in calculating the fair value of the RSUs. The following table provides the compensation cost and income tax benefit for stock-based compensation related to RSUs:



	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2017		2016		2017		2016
Stock-based compensation within operations and maintenance expenses	$	322	$	296	$	603	$	464
Income tax benefit		133		122		249		191

The following table summarizes the RSU transactions for the six months ended June 30, 2017:



	Number	Weighted
	of	Average
	Stock Units	Fair Value
Nonvested stock units at beginning of period	109,273	$	28.48
Granted	41,293		30.37
Stock units vested and issued	(26,279)		26.12
Forfeited	(2,287)		30.52
Nonvested stock units at end of period	122,000	$	29.59

The per unit weighted-average fair value at the date of grant for RSUs granted during the six months ended June 30, 2017 and 2016 was $30.37 and $32.09, respectively.

Stock Options – A stock option represents the option to purchase a number of shares of common stock of the Company as specified in the stock option grant agreement at the exercise price per share as determined by the closing market price of our common stock on the grant date. Stock options are exercisable in installments of 33% annually, starting one year from the grant date and expire 10 years from the grant date. The fair value of each stock option is amortized into compensation expense using the graded-vesting method, which results in the recognition of compensation costs over the requisite service period for each separately vesting tranche of the stock options as though the stock options were, in substance, multiple stock option grants. The following table provides the compensation cost and income tax benefit for stock-based compensation related to stock options:



	Three Months Ended				Six Months Ended
	June 30,					June 30,
	2017		2016		2017		2016
Stock-based compensation within operations and maintenance expenses	$	74	$	-	$	104	$	-
Income tax benefit		33		18		125		234

The fair value of options was estimated at the grant date using the Black-Scholes option-pricing model. The following assumptions were used in the application of this valuation model:


	2017
Expected term (years)	5.45
Risk-free interest rate	2.01%
Expected volatility	17.7%
Dividend yield	2.51%
Grant date fair value per option	$ 4.07

Historical information was the principal basis for the selection of the expected term and dividend yield. The expected volatility is based on a weighted-average combination of historical and implied volatilities over a time period that approximates the expected term of the option. The risk-free interest rate was selected based upon the U.S. Treasury yield curve in effect at the time of grant for the expected term of the option.

For the six months ended June 30, 2016, there were no compensation costs for stock-based compensation related to stock options, as the previous stock option grant that occurred in 2010 became fully amortized in 2013. Additionally, there were no stock options granted during the six months ended June 30, 2016.

The following table summarizes stock option transactions for the six months ended June 30, 2017:



		Weighted		Weighted
		Average		Average	Aggregate
		Exercise		Remaining	Intrinsic
	Shares	Price		Life (years)	Value
Outstanding at beginning of period	427,335	$	15.55
Granted	120,127		30.47
Forfeited	(1,053)		30.47
Expired / Cancelled	(2,812)		14.26
Exercised	(140,550)		16.56
Outstanding at end of period	403,047	$	19.62	4.0	$	5,514

Exercisable at end of period	283,973	$	15.07	1.6	$	5,177

Stock Awards – Stock awards represent the issuance of our common stock, without restriction. The issuance of stock awards results in compensation expense which is equal to the fair market value of the stock on the grant date, and is expensed immediately upon grant. The following table provides the compensation cost and income tax benefit for stock-based compensation related to stock awards:



	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2017		2016		2017		2016
Stock-based compensation within operations and maintenance expenses	$	131	$	131	$	262	$	244
Income tax benefit		54		54		109		101

The following table summarizes stock award transactions for the six months ended June 30, 2017:



	Number	Weighted
	of	Average
	Stock Awards	Fair Value
Nonvested stock awards at beginning of period	-	$	-
Granted	8,001		32.79
Vested	(8,001)		32.79
Nonvested stock awards at end of period	-	$	-

The per unit weighted-average fair value at the date of grant for stock awards granted during the six months ended June 30, 2017 and 2016 was $32.79 and $33.64, respectively.

Pension Plans And Other Postretirement Benefits

6 Months Ended

Jun. 30, 2017

Pension Plans And Other Postretirement Benefits [Abstract]

Pension Plans And Other Postretirement Benefits

Note 9 – Pension Plans and Other Postretirement Benefits

The Company maintains a qualified defined benefit pension plan (the “Pension Plan”), a nonqualified pension plan and other postretirement benefit plans for certain of its employees. The net periodic benefit cost is based on estimated values and an extensive use of assumptions about the discount rate, expected return on plan assets, the rate of future compensation increases received by the Company’s employees, mortality, turnover, and medical costs. The following tables provide the components of net periodic benefit cost:



	Pension Benefits
	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2017		2016		2017		2016
Service cost	$	794	$	784	$	1,587	$	1,610
Interest cost		3,108		3,251		6,217		6,536
Expected return on plan assets		(4,270)		(4,215)		(8,539)		(8,481)
Amortization of prior service cost		145		145		290		290
Amortization of actuarial loss		2,001		1,797		4,002		3,557
Settlement charge		-		-		-		3,028
Special termination benefit charge		-		-		-		302
Net periodic benefit cost	$	1,778	$	1,762	$	3,557	$	6,842

	Other
	Postretirement Benefits
		Three Months Ended				Six Months Ended
		June 30,				June 30,
	2017		2016		2017		2016
Service cost	$	255	$	253	$	510	$	508
Interest cost		737		726		1,473		1,476
Expected return on plan assets		(647)		(645)		(1,294)		(1,356)
Amortization of prior service cost		(127)		(137)		(254)		(274)
Amortization of actuarial loss		291		220		583		487
Net periodic benefit cost	$	509	$	417	$	1,018	$	841

Effective July 1, 2015, the Company added a permanent lump sum option to the form of benefit payments offered to participants of the qualified defined benefit pension plan and non-qualified retirement plans upon retirement or termination. During the first quarter of 2016, the lump sum payments paid to participants who elected this option for payments from the non-qualified retirement plans resulted in a settlement charge.

The Company made cash contributions of $15,421 to its Pension Plan during the first six months of 2017, which completed the Company’s 2017 cash contributions.

Water And Wastewater Rates	6 Months Ended
Water And Wastewater Rates	Jun. 30, 2017
Water And Wastewater Rates [Abstract]
Water And Wastewater Rates	Note 10 – Water and Wastewater Rates During the first six months of 2017, the Company’s operating divisions in Indiana and Ohio were granted base rate increases designed to increase total operating revenues on an annual basis by $7,403. Further, during the first six months of 2017, the Company’s operating divisions in Illinois, New Jersey, and North Carolina received approval to bill infrastructure rehabilitation surcharges designed to increase total operating revenues on an annual basis by $3,659.

Taxes Other Than Income Taxes

6 Months Ended

Jun. 30, 2017

Taxes Other Than Income Taxes [Abstract]

Taxes Other Than Income Taxes

Note 11 – Taxes Other than Income Taxes

The following table provides the components of taxes other than income taxes:



	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2017		2016		2017		2016
Property	$	6,867	$	6,928	$	13,652	$	13,113
Gross receipts, excise and franchise		3,363		3,113		6,538		6,059
Payroll		2,132		2,299		5,256		5,635
Regulatory assessments		630		681		1,259		1,352
Pumping fees		1,350		1,140		2,294		2,059
Other		77		81		157		164
Total taxes other than income	$	14,419	$	14,242	$	29,156	$	28,382

Segment Information

6 Months Ended

Jun. 30, 2017

Segment Information [Abstract]

Segment Information

Note 12 – Segment Information

The Company has ten operating segments and one reportable segment. The Regulated segment, the Company’s single reportable segment, is comprised of eight operating segments representing our water and wastewater regulated utility companies which are organized by the states where we provide water and wastewater services. These operating segments are aggregated into one reportable segment because each of these operating segments has the following similarities: economic characteristics, nature of services, production processes, customers, water distribution or wastewater collection methods, and the nature of the regulatory environment.

Two operating segments are included within the Other category below. These segments are not quantitatively significant and are comprised of Aqua Resources and Aqua Infrastructure. Aqua Resources provides water and wastewater service through operating and maintenance contracts with municipal authorities and other parties close to our utility companies’ service territories; and offers, through a third party, water and sewer line repair service and protection solutions to households. Aqua Infrastructure provides non-utility raw water supply services for firms in the natural gas drilling industry. In addition to these segments, Other is comprised of other business activities not included in the reportable segment, including corporate costs that have not been allocated to the Regulated segment and intersegment eliminations. Corporate costs include general and administrative expenses, and interest expense. Additionally, contained within total assets for the Other category, in the table below, is a regulatory asset for postretirement benefits for the underfunded status of the Company’s pension and other postretirement benefit plans and an intercompany receivable.

The following table presents information about the Company’s reportable segment:



	Three Months Ended						Three Months Ended
	June 30, 2017						June 30, 2016
	Regulated		Other		Consolidated		Regulated		Other		Consolidated
Operating revenues	$	201,960	$	1,458	$	203,418	$	198,086	$	5,790	$	203,876
Operations and maintenance expense		72,560		(1,707)		70,853		69,676		4,318		73,994
Depreciation		34,141		(734)		33,407		32,214		(595)		31,619
Operating income		81,152		3,460		84,612		82,018		1,475		83,493
Interest expense, net		19,747		1,640		21,387		19,093		1,022		20,115
Allowance for funds used during construction		3,463		-		3,463		1,871		-		1,871
Income tax expense (benefit)		5,249		320		5,569		5,910		(395)		5,515
Net income		59,629		1,339		60,968		59,004		622		59,626

	Six Months Ended						Six Months Ended
	June 30, 2017						June 30, 2016
	Regulated		Other		Consolidated		Regulated		Other		Consolidated
Operating revenues	$	388,309	$	2,896	$	391,205	$	384,092	$	12,391	$	396,483
Operations and maintenance expense		140,070		(89)		139,981		137,001		10,534		147,535
Depreciation		67,807		(563)		67,244		64,420		(656)		63,764
Operating income		152,219		2,289		154,508		154,868		956		155,824
Interest expense, net		39,524		3,189		42,713		37,894		2,074		39,968
Allowance for funds used during construction		6,656		-		6,656		4,179		-		4,179
Income tax expense (benefit)		9,105		(606)		8,499		9,583		(1,061)		8,522
Net income (loss)		110,525		(485)		110,040		111,898		(535)		111,363
Capital expenditures		208,174		298		208,472		167,900		687		168,587


	June 30,		December 31,
	2017		2016
Total assets:
Regulated	$	6,145,289	$	5,953,702
Other		238,410		205,289
Consolidated	$	6,383,699	$	6,158,991

Commitments And Contingencies	6 Months Ended
Commitments And Contingencies	Jun. 30, 2017
Commitments And Contingencies [Abstract]
Commitments And Contingencies	Note 13 – Commitments and Contingencies The Company is routinely involved in various disputes, claims, lawsuits and other regulatory and legal matters, including both asserted and unasserted legal claims, in the ordinary course of business. The status of each such matter, referred to herein as a loss contingency, is reviewed and assessed in accordance with applicable accounting rules regarding the nature of the matter, the likelihood that a loss will be incurred, and the amounts involved. As of June 30, 2017, the aggregate amount of $15,259 is accrued for loss contingencies and is reported in the Company’s consolidated balance sheet as other accrued liabilities and other liabilities. These accruals represent management’s best estimate of probable loss (as defined in the accounting guidance) for loss contingencies or the low end of a range of losses if no single probable loss can be estimated. For some loss contingencies, the Company is unable to estimate the amount of the probable loss or range of probable losses. While the final outcome of these loss contingencies cannot be predicted with certainty, and unfavorable outcomes could negatively impact the Company, at this time in the opinion of management, the final resolution of these matters are not expected to have a material adverse effect on the Company’s financial position, results of operations or cash flows. Further, the Company has insurance coverage for certain of these loss contingencies, and as of June 30, 2017, estimates that approximately $3,407 of the amount accrued for these matters are probable of recovery through insurance, which amount is also reported in the Company’s consolidated balance sheet as deferred charges and other assets. In addition to the aforementioned loss contingencies, the Company self-insures its employee medical benefit program, and maintains stop-loss coverage to limit the exposure arising from these claims. The Company’s reserve for these claims totaled $1,770 at June 30, 2017 and represents a reserve for unpaid claim costs, including an estimate for the cost of incurred but not reported claims.

Income Taxes	6 Months Ended
Income Taxes	Jun. 30, 2017
Income Taxes [Abstract]
Income Taxes	Note 14 – Income Taxes During the six months ended June 30, 2017, the Company’s Federal net operating loss (“NOL”) carryforward decreased by $15,986. In addition, during the six months ended June 30, 2017, the Company’s state NOL carryforward increased by $11,925. As of June 30, 2017, the balance of the Company’s Federal NOL was $97,158. The Company believes its Federal NOL carryforward is more likely than not to be recovered and requires no valuation allowance. As of June 30, 2017, the balance of the Company’s gross state NOL was $587,066, a portion of which is offset by a valuation allowance because the Company does not believe the state NOLs are more likely than not to be realized. The Company’s Federal and state NOL carryforwards begin to expire in 2032 and 2023, respectively. The Company’s Federal and state NOL carryforwards are reduced by an unrecognized tax position, on a gross basis, of $63,631 and $85,232, respectively. The amounts of the Company’s Federal and state NOL carryforwards prior to being reduced by the unrecognized tax positions were $160,789 and $672,298 respectively. The Company records its unrecognized tax benefit as a reduction to its deferred income tax liability. In accordance with a 2012 settlement agreement with the Pennsylvania Public Utility Commission, Aqua Pennsylvania expenses, for tax purposes, qualifying utility asset improvement costs, which results in a substantial reduction in income tax expense and greater net income and cash flows. The Company’s effective income tax rate for the second quarter of 2017 and 2016 was 8.4% and 8.5%, respectively, and for the first six months of 2017 and 2016 was 7.2% and 7.1%, respectively. As of June 30, 2017, the total gross unrecognized tax benefit was $28,464, of which $22,364, if recognized, would affect the Company’s effective tax rate as a result of the regulatory treatment afforded for qualifying infrastructure improvements in Pennsylvania. At December 31, 2016, the Company had unrecognized tax benefits of $28,099. Accounting rules for uncertain tax positions specify that tax positions for which the timing of resolution is uncertain should be classified as long-term liabilities. Judgment is required in evaluating the Company’s uncertain tax positions and determining the provision for income taxes. Management believes that an adequate provision has been made for any adjustments that may result from tax examinations. Although the timing of income tax audit resolutions and negotiations with taxing authorities is highly uncertain, the Company does not anticipate a significant change to the total amount of unrecognized income tax benefits within the next 12 months.

Recent Accounting Pronouncements	6 Months Ended
Recent Accounting Pronouncements	Jun. 30, 2017
Recent Accounting Pronouncements [Abstract]
Recent Accounting Pronouncements	Note 15 – Recent Accounting Pronouncements In March 2017, the FASB issued updated accounting guidance on the presentation of net periodic pension and postretirement benefit cost (net benefit cost). Historically, net benefit cost is reported as an employee cost within operating income, net of amounts capitalized. The guidance requires the bifurcation of net benefit cost. The service cost component will be presented with other employee compensation costs in operating income and the other components of net benefit cost will be reported separately outside of operating income, and will not be eligible for capitalization. The guidance is effective for annual reporting periods beginning after December 15, 2017, and interim periods within that reporting period. The Company is evaluating the requirements of the updated guidance to determine the impact of adoption. In January 2017, the FASB issued updated accounting guidance that eliminates step 2 of the current goodwill impairment test, which requires a hypothetical purchase price allocation to measure goodwill impairment. A goodwill impairment loss will instead be measured at the amount by which a reporting unit’s carrying amount exceeds its fair value, not to exceed the carrying amount of goodwill. The guidance will be effective for annual reporting periods beginning after December 15, 2019, and interim periods within that reporting period, with early adoption permitted for any impairment test performed on testing dates after January 1, 2017. The Company has elected to early adopt the provisions of the updated guidance, for its annual impairment valuation to be performed in the third quarter of 2017, and does not expect the provisions of the updated guidance to have an impact on its results of operations or financial position. In August 2016, the FASB issued updated accounting guidance on the classification of certain cash receipts and cash payments in the statement of cash flows, which is intended to reduce diversity in practice in how certain transactions are classified in the statement of cash flows. This guidance is effective for fiscal years, and interim periods within those years, beginning after December 15, 2017, and early adoption is permitted. The Company is currently evaluating the impact of this new standard on its consolidated cash flow statement, but does not expect there to be a significant impact. In March 2016, the FASB issued updated accounting guidance on simplifying the accounting for share-based payments, which includes several aspects of the accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities, and classification on the statement of cash flows. The updated guidance was effective for fiscal years beginning after December 15, 2016, and interim periods within those fiscal years, with early adoption available. On January 1, 2017, the Company adopted the updated guidance, prospectively, and recognized a previously unrecognized windfall tax benefit for stock-based compensation of $982 associated with the Company’s 2012 Federal net operating loss, which was recorded as an adjustment to deferred income taxes and retained earnings (refer to the presentation of “cumulative effect of change in accounting principle - windfall tax benefit” on our Consolidated Statement of Equity). Additionally, income tax benefits in excess of compensation costs or tax deficiencies for share-based compensation are now recorded to our income tax provision, instead of historically to stockholder’s equity, which impacts our effective tax rate. Lastly, all tax-related cash flows resulting from share-based payments are reported prospectively as operating activities on the statement of cash flows, a change from the historical requirement to present tax benefits as an inflow from financing activities and an outflow from operating activities. In February 2016, the FASB issued updated accounting guidance on accounting for leases, which requires lessees to establish a right-of-use asset and a lease liability on the balance sheet for all leases with terms longer than 12 months. For income statement purposes, leases will be classified as either operating or finance. Operating leases will result in straight-line expense while finance leases will result in a front-loaded expense pattern. The updated accounting guidance is effective for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years, with early adoption available. The Company is evaluating the requirements of the updated guidance to determine the impact of adoption. In January 2016, the FASB issued updated accounting guidance on the recognition and measurement of financial assets and financial liabilities, which amends certain aspects of recognition, measurement, presentation, and disclosure of financial instruments, including the requirement to measure certain equity investments at fair value with changes in fair value recognized in net income. The updated guidance is effective for interim and annual periods beginning after December 31, 2017. The Company does not expect the provisions of the updated guidance to have a material impact on its results of operations or financial position. In May 2014, the FASB issued updated accounting guidance on recognizing revenue from contracts with customers, which outlines a single comprehensive model that an entity will apply to determine the measurement of revenue and timing of recognition. The underlying principle is that an entity will recognize revenue to depict the transfer of goods or services to customers at an amount that the entity expects to be entitled to in exchange for those goods or services. The updated guidance also requires additional disclosure about the nature, amount, timing, and uncertainty of revenue and cash flows arising from customer contracts, including significant judgments and changes in judgments and assets recognized from costs incurred to fulfill a contract. Additionally, the accounting for contributions in aid of construction may be impacted by the updated accounting guidance if the contributions are determined to be in scope. In July 2015, the FASB approved a one year deferral to the original effective date of this guidance. The updated guidance is effective for annual periods beginning after December 15, 2017, and interim periods therein, using either of the following transition methods: (i) a full retrospective approach reflecting the application of the updated guidance in each prior reporting period, or (ii) a modified retrospective approach with the cumulative effect of initially adopting the updated guidance recognized through retained earnings at the date of adoption. In 2016, the Company performed an evaluation of the requirements of the updated guidance and based on current interpretations of the updated guidance believes that the impact of adoption may not result in a material change in our measurement of revenue and timing of recognition if contributions in aid of construction are determined to not be in scope. In 2017, the American Institute of Certified Public Accountants (AICPA) power and utility entities revenue recognition task force has determined that contributions in aid of construction are not in the scope of the new standard, and submitted its determination to the AICPA’s revenue recognition working group for approval. We plan to implement the updated guidance using the modified retrospective approach on January 1, 2018.

Goodwill (Tables)

6 Months Ended

Jun. 30, 2017

Goodwill [Abstract]

Schedule Of Goodwill



	Regulated
	Segment		Other		Consolidated
Balance at December 31, 2016	$	37,367	$	4,841	$	42,208
Goodwill acquired		72		-		72
Reclassification to utility plant acquisition adjustment		(14)		-		(14)
Balance at June 30, 2017	$	37,425	$	4,841	$	42,266

Capitalization (Tables)

6 Months Ended

Jun. 30, 2017

Capitalization [Abstract]

Schedule Of Capitalization

\
Amount	Interest Rate	Maturity
$25,000	3.64%	2032
$6,000	3.89%	2037
$15,000	3.90%	2038
$10,000	4.18%	2047
$22,000	4.22%	2049
$22,000	4.24%	2050

Fair Value Of Financial Instruments (Tables)

6 Months Ended

Jun. 30, 2017

Fair Value Of Financial Instruments [Abstract]

Schedule Of Carrying Amounts And Estimated Fair Values Of Long-Term Debt

Net Income Per Common Share (Tables)

6 Months Ended

Jun. 30, 2017

Net Income Per Common Share [Abstract]

Schedule Of Earnings Per Share



	Three Months Ended		Six Months Ended
	June 30,		June 30,
	2017	2016	2017	2016
Average common shares outstanding during the period for basic computation	177,609	177,288	177,545	177,196
Dilutive effect of employee stock-based compensation	436	796	497	724
Average common shares outstanding during the period for diluted computation	178,045	178,084	178,042	177,920

Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2017

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Summary Of PSU Transactions



	Number	Weighted
	of	Average
	Share Units	Fair Value
Nonvested share units at beginning of period	476,896	$	27.96
Granted	125,202		30.79
Performance criteria adjustment	(64,034)		27.75
Forfeited	(12,915)		28.01
Share units vested in prior period and issued in current period	32,400		25.31
Share units issued	(125,999)		36.37
Nonvested share units at end of period	431,550	$	26.16

Summary Of RSU Transactions



	Number	Weighted
	of	Average
	Stock Units	Fair Value
Nonvested stock units at beginning of period	109,273	$	28.48
Granted	41,293		30.37
Stock units vested and issued	(26,279)		26.12
Forfeited	(2,287)		30.52
Nonvested stock units at end of period	122,000	$	29.59

Assumptions Used In The Pricing Model


	2017
Expected term (years)	5.45
Risk-free interest rate	2.01%
Expected volatility	17.7%
Dividend yield	2.51%
Grant date fair value per option	$ 4.07

Summary Of Stock Option Transactions



		Weighted		Weighted
		Average		Average	Aggregate
		Exercise		Remaining	Intrinsic
	Shares	Price		Life (years)	Value
Outstanding at beginning of period	427,335	$	15.55
Granted	120,127		30.47
Forfeited	(1,053)		30.47
Expired / Cancelled	(2,812)		14.26
Exercised	(140,550)		16.56
Outstanding at end of period	403,047	$	19.62	4.0	$	5,514

Exercisable at end of period	283,973	$	15.07	1.6	$	5,177

Performance Share Units [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Summary Of Compensation Costs



	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2017		2016		2017		2016
Stock-based compensation within operations and maintenance expenses	$	971	$	967	$	1,841	$	1,492
Income tax benefit		394		392		747		601

Restricted Stock Units [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Summary Of Compensation Costs



	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2017		2016		2017		2016
Stock-based compensation within operations and maintenance expenses	$	322	$	296	$	603	$	464
Income tax benefit		133		122		249		191

Stock Options [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Summary Of Compensation Costs



	Three Months Ended				Six Months Ended
	June 30,					June 30,
	2017		2016		2017		2016
Stock-based compensation within operations and maintenance expenses	$	74	$	-	$	104	$	-
Income tax benefit		33		18		125		234

Stock Compensation Plan [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Summary Of Compensation Costs



	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2017		2016		2017		2016
Stock-based compensation within operations and maintenance expenses	$	131	$	131	$	262	$	244
Income tax benefit		54		54		109		101

Summary Of Nonvested Share Activity



	Number	Weighted
	of	Average
	Stock Awards	Fair Value
Nonvested stock awards at beginning of period	-	$	-
Granted	8,001		32.79
Vested	(8,001)		32.79
Nonvested stock awards at end of period	-	$	-

Pension Plans And Other Postretirement Benefits (Tables)

6 Months Ended

Jun. 30, 2017

Pension Plans And Other Postretirement Benefits [Abstract]

Components Of Net Periodic Benefit Costs



	Pension Benefits
	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2017		2016		2017		2016
Service cost	$	794	$	784	$	1,587	$	1,610
Interest cost		3,108		3,251		6,217		6,536
Expected return on plan assets		(4,270)		(4,215)		(8,539)		(8,481)
Amortization of prior service cost		145		145		290		290
Amortization of actuarial loss		2,001		1,797		4,002		3,557
Settlement charge		-		-		-		3,028
Special termination benefit charge		-		-		-		302
Net periodic benefit cost	$	1,778	$	1,762	$	3,557	$	6,842

	Other
	Postretirement Benefits
		Three Months Ended				Six Months Ended
		June 30,				June 30,
	2017		2016		2017		2016
Service cost	$	255	$	253	$	510	$	508
Interest cost		737		726		1,473		1,476
Expected return on plan assets		(647)		(645)		(1,294)		(1,356)
Amortization of prior service cost		(127)		(137)		(254)		(274)
Amortization of actuarial loss		291		220		583		487
Net periodic benefit cost	$	509	$	417	$	1,018	$	841

Taxes Other Than Income Taxes (Tables)

6 Months Ended

Jun. 30, 2017

Taxes Other Than Income Taxes [Abstract]

Components Of Taxes Other Than Income Taxes



	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2017		2016		2017		2016
Property	$	6,867	$	6,928	$	13,652	$	13,113
Gross receipts, excise and franchise		3,363		3,113		6,538		6,059
Payroll		2,132		2,299		5,256		5,635
Regulatory assessments		630		681		1,259		1,352
Pumping fees		1,350		1,140		2,294		2,059
Other		77		81		157		164
Total taxes other than income	$	14,419	$	14,242	$	29,156	$	28,382

Segment Information (Tables)

6 Months Ended

Jun. 30, 2017

Segment Information [Abstract]

Company's Segment Information, Continuing Operations



	Three Months Ended						Three Months Ended
	June 30, 2017						June 30, 2016
	Regulated		Other		Consolidated		Regulated		Other		Consolidated
Operating revenues	$	201,960	$	1,458	$	203,418	$	198,086	$	5,790	$	203,876
Operations and maintenance expense		72,560		(1,707)		70,853		69,676		4,318		73,994
Depreciation		34,141		(734)		33,407		32,214		(595)		31,619
Operating income		81,152		3,460		84,612		82,018		1,475		83,493
Interest expense, net		19,747		1,640		21,387		19,093		1,022		20,115
Allowance for funds used during construction		3,463		-		3,463		1,871		-		1,871
Income tax expense (benefit)		5,249		320		5,569		5,910		(395)		5,515
Net income		59,629		1,339		60,968		59,004		622		59,626

	Six Months Ended						Six Months Ended
	June 30, 2017						June 30, 2016
	Regulated		Other		Consolidated		Regulated		Other		Consolidated
Operating revenues	$	388,309	$	2,896	$	391,205	$	384,092	$	12,391	$	396,483
Operations and maintenance expense		140,070		(89)		139,981		137,001		10,534		147,535
Depreciation		67,807		(563)		67,244		64,420		(656)		63,764
Operating income		152,219		2,289		154,508		154,868		956		155,824
Interest expense, net		39,524		3,189		42,713		37,894		2,074		39,968
Allowance for funds used during construction		6,656		-		6,656		4,179		-		4,179
Income tax expense (benefit)		9,105		(606)		8,499		9,583		(1,061)		8,522
Net income (loss)		110,525		(485)		110,040		111,898		(535)		111,363
Capital expenditures		208,174		298		208,472		167,900		687		168,587

Company's Segment Information, Assets


	June 30,		December 31,
	2017		2016
Total assets:
Regulated	$	6,145,289	$	5,953,702
Other		238,410		205,289
Consolidated	$	6,383,699	$	6,158,991

Goodwill (Details) $ in Thousands	6 Months Ended
Goodwill (Details) $ in Thousands	Jun. 30, 2017 USD ($)
Goodwill [Line Items]
Balance	$ 42,208
Goodwill acquired	72
Reclassification to utility plant acquisition adjustment	(14)
Balance	42,266
Regulated [Member]
Goodwill [Line Items]
Balance	37,367
Goodwill acquired	72
Reclassification to utility plant acquisition adjustment	(14)
Balance	37,425
Other [Member]
Goodwill [Line Items]
Balance	4,841
Goodwill acquired
Reclassification to utility plant acquisition adjustment
Balance	$ 4,841

Acquisitions (Details) $ in Thousands	1 Months Ended	6 Months Ended	12 Months Ended
Acquisitions (Details) $ in Thousands	Jan. 31, 2016 USD ($) customer shares	Jun. 30, 2017 USD ($) customer item	Dec. 31, 2016 USD ($) customer item
Business Acquisition [Line Items]
Goodwill		$ 42,266	$ 42,208
Superior Water Company, Inc. [Member]
Business Acquisition [Line Items]
Number of customers \| customer	3,900
Total purchase price	$ 16,750
Shares issued for acquisition \| shares	439,943
Cash Paid	$ 3,905
Acquired property, plant and equipment	25,167
Contributions in aid of construction	16,565
Goodwill	$ 8,622
Water And Wastewater Utility Systems In Various States [Member]
Business Acquisition [Line Items]
Number of customers \| customer		1,002	2,469
Total purchase price		$ 5,765	$ 5,518
Goodwill		$ 72	$ 1,756
Number of acquisitions \| item		3	18

Assets Held For Sale (Details) - Disposal Group, Not Discontinued Operations [Member]	3 Months Ended	6 Months Ended
	Jun. 30, 2016 item	Jun. 30, 2017 customer
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of customers \| customer		265
Sale of business units \| item	2

Capitalization (Narrative) (Details) - Aqua Pennsylvania, Inc [Member] - USD ($)	1 Months Ended
	Jul. 31, 2017	Jan. 31, 2017
First Mortgage Bonds [Member]
Debt Instrument [Line Items]
Face Amount		$ 50,000,000
First Mortgage Bonds Due In 2042 [Member]
Debt Instrument [Line Items]
Face Amount		$ 10,000,000
Maturity Year		2042
Interest Rate		3.65%
First Mortgage Bonds Due In 2044 [Member]
Debt Instrument [Line Items]
Face Amount		$ 40,000,000
Maturity Year		2044
Interest Rate		3.69%
First Mortgage Bonds [Member] \| Subsequent Event [Member]
Debt Instrument [Line Items]
Face Amount	$ 80,000,000
First Mortgage Bonds Due In 2055 [Member] \| Subsequent Event [Member]
Debt Instrument [Line Items]
Face Amount	$ 40,000,000
Maturity Year	2055
Interest Rate	4.04%
First Mortgage Bonds Due In 2057 [Member] \| Subsequent Event [Member]
Debt Instrument [Line Items]
Face Amount	$ 40,000,000
Maturity Year	2057
Interest Rate	4.06%

Capitalization (Schedule Of Capitalization) (Details) - Subsequent Event [Member] - Aqua Illinois [Member] $ in Thousands	1 Months Ended
	Jul. 31, 2017 USD ($)
Capitalization [Line Items]
Amount	$ 100,000
First Mortgage Bond Maturing 2032 [Member]
Capitalization [Line Items]
Amount	$ 25,000
Interest Rate	3.64%
Maturity	2032
First Mortgage Bond Maturing 2037 [Member]
Capitalization [Line Items]
Amount	$ 6,000
Interest Rate	3.89%
Maturity	2037
First Mortgage Bond Maturing 2038 [Member]
Capitalization [Line Items]
Amount	$ 15,000
Interest Rate	3.90%
Maturity	2038
First Mortgage Bond Maturing 2047 [Member]
Capitalization [Line Items]
Amount	$ 10,000
Interest Rate	4.18%
Maturity	2047
First Mortgage Bond Maturing 2049 [Member]
Capitalization [Line Items]
Amount	$ 22,000
Interest Rate	4.22%
Maturity	2049
First Mortgage Bond Maturing 2050 [Member]
Capitalization [Line Items]
Amount	$ 22,000
Interest Rate	4.24%
Maturity	2050

Fair Value Of Financial Instruments (Narrative) (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016	Jun. 30, 2016	Dec. 31, 2015
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	$ 7,811	$ 3,763	$ 4,923	$ 3,229
Customers' advances for construction	91,131	91,843
Fair Value, Inputs, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans payable	67,456	6,535
Mutual funds	18,000	17,072
Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	7,811	3,763
Customers' advances for construction	$ 91,131	$ 91,843

- Definition

Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

+ References + Details

Fair Value Of Financial Instruments (Schedule Of Carrying Amounts And Estimated Fair Values Of Long-Term Debt) (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Carrying Amount [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	$ 1,987,909	$ 1,910,633
Estimated Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	$ 2,049,090	$ 2,018,933

Net Income Per Common Share (Schedule Of Earnings Per Share) (Details) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Net Income Per Common Share [Abstract]
Average common shares outstanding during the period for basic computation	177,609	177,288	177,545	177,196
Dilutive effect of employee stock-based compensation	436	796	497	724
Average common shares outstanding during the period for diluted computation	178,045	178,084	178,042	177,920

Stock-Based Compensation (Narrative) (Details) - $ / shares	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted	160,279
2004 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized for issuance	0
2009 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized for issuance	6,250,000
Maximum number of shares may be issued pursuant to stock awards, stock units and other stock-based awards	3,125,000
Maximum number of shares subject to grants to any one individual in any one year	500,000
Underlying stock option and restricted stock awards available for grant	3,741,035
Performance Share Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period, in years	3 years
Weighted average fair value of stock awards granted	$ 30.79	$ 28.89
Amortization period of fair value of shares, in months	36 months
Granted	125,202
Performance Share Units [Member] \| Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of target award amount the grantee may earn	0.00%
Performance Share Units [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of target award amount the grantee may earn	200.00%
Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted period	3 years
Weighted average fair value of stock awards granted	$ 30.37	$ 32.09
Granted	41,293
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period, start, in years	1 year
Vesting period, in years	10 years
Granted		0
Stock Options [Member] \| Share-based Compensation Award, Tranche One [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	33.00%
Stock Options [Member] \| Share-based Compensation Award, Tranche Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	33.00%
Stock Options [Member] \| Share-based Compensation Award, Tranche Three [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	33.00%
Stock Compensation Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average fair value of stock awards granted	$ 32.79	$ 33.64
Granted	8,001

Stock-Based Compensation (Summary Of PSU Transactions) (Details) - $ / shares	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted, Number of Share Units	160,279
Performance Share Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested share units at beginning of period, Number of Share Units	476,896
Granted, Number of Share Units	125,202
Performance criteria adjustment, Number of Share Units	(64,034)
Forfeited, Number of Share Units	(12,915)
Share units vested in prior period and issued in current period, Number of Share Units	32,400
Share units issued, Number of Share Units	(125,999)
Nonvested share units at end of period, Number of Share Units	431,550
Nonvested share units at beginning of period, Weighted Average Fair Value	$ 27.96
Granted, Weighted Average Fair Value	30.79	$ 28.89
Performance criteria adjustment, Weighted Average Fair Value	27.75
Forfeited, Weighted Average Fair Value	28.01
Stock units vested and issued, Weighted Average Fair Value	25.31
Share units issued, Weighted Average Fair Value	36.37
Nonvested share units at end of period, Weighted Average Fair Value	$ 26.16

Stock-Based Compensation (Summary Of RSU Transactions) (Details) - $ / shares	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted, Number of Share Units	160,279
Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested share units at beginning of period, Number of Share Units	109,273
Granted, Number of Share Units	41,293
Stock units vested and issued, Number of Share Units	(26,279)
Forfeited, Number of Share Units	(2,287)
Nonvested share units at end of period, Number of Share Units	122,000
Nonvested share units at beginning of period, Weighted Average Fair Value	$ 28.48
Granted, Weighted Average Fair Value	30.37	$ 32.09
Stock units vested and issued, Weighted Average Fair Value	26.12
Forfeited, Weighted Average Fair Value	30.52
Nonvested share units at end of period, Weighted Average Fair Value	$ 29.59

Stock-Based Compensation (Summary Of Compensation Costs) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation within operations and maintenance expense	$ 74,000		$ 104,000	$ 0
Income tax benefit	33,000	$ 18,000	125,000	234,000
Performance Share Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation within operations and maintenance expense	971,000	967,000	1,841,000	1,492,000
Income tax benefit	394,000	392,000	747,000	601,000
Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation within operations and maintenance expense	322,000	296,000	603,000	464,000
Income tax benefit	133,000	122,000	249,000	191,000
Stock Compensation Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation within operations and maintenance expense	131,000	131,000	262,000	244,000
Income tax benefit	$ 54,000	$ 54,000	$ 109,000	$ 101,000

Stock-Based Compensation (Assumptions Used In The Pricing Model) (Details) - Stock Options [Member]	6 Months Ended
	Jun. 30, 2017 $ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term (years)	5 years 5 months 12 days
Risk-free interest rate	2.01%
Expected volatility	17.70%
Dividend yield	2.51%
Grant date fair value per option	$ 4.07

Stock-Based Compensation (Summary Of Stock Option Transactions) (Details) $ / shares in Units, $ in Thousands	6 Months Ended
	Jun. 30, 2017 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercised, Shares	(140,550)
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding at beginning of period, Shares	427,335
Granted, Shares	120,127
Forfeited, Shares	(1,053)
Expired / Canelled, Shares	(2,812)
Exercised, Shares	(140,550)
Outstanding at end of period, Shares	403,047
Exercisable at end of period, Shares	283,973
Outstanding at beginning of period, Weighted Average Exercise Price \| $ / shares	$ 15.55
Granted, Weighted Average Exercise Price \| $ / shares	30.47
Forfeited, Weighted Average Exercise Price \| $ / shares	30.47
Expired / Canelled, Weighted Average Exercise Price \| $ / shares	14.26
Exercised, Weighted Average Exercise Price \| $ / shares	16.56
Outstanding at end of period, Weighted Average Exercise Price \| $ / shares	19.62
Exercisable at end of period, Weighted Average Exercise Price \| $ / shares	$ 15.07
Outstanding at end of period, Weighted Average Remaining Life (years)	4 years
Exercisable at end of period, Weighted Average Remaining Life (years)	1 year 7 months 6 days
Outstanding at end of period, Aggregate Intrinsic Value \| $	$ 5,514
Exercisable at end of period, Aggregate Intrinsic Value \| $	$ 5,177

Stock-Based Compensation (Summary Of Nonvested Share Activity) (Details) - $ / shares	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted, Number of Share Units	160,279
Stock Compensation Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested share units at beginning of period, Number of Share Units
Granted, Number of Share Units	8,001
Stock units vested and issued, Number of Share Units	(8,001)
Nonvested share units at end of period, Number of Share Units
Nonvested share units at beginning of period, Weighted Average Fair Value
Granted, Weighted Average Fair Value	32.79	$ 33.64
Stock units vested and issued, Weighted Average Fair Value	32.79
Nonvested share units at end of period, Weighted Average Fair Value

Pension Plans And Other Postretirement Benefits (Narrative) (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2017 USD ($)
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Cash contributions made by the Company	$ 15,421

Pension Plans And Other Postretirement Benefits (Components Of Net Periodic Benefit Costs) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 794	$ 784	$ 1,587	$ 1,610
Interest cost	3,108	3,251	6,217	6,536
Expected return on plan assets	(4,270)	(4,215)	(8,539)	(8,481)
Amortization of prior service cost	145	145	290	290
Amortization of actuarial loss	2,001	1,797	4,002	3,557
Settlement charge				3,028
Special termination benefit charge				302
Net periodic benefit cost	1,778	1,762	3,557	6,842
Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	255	253	510	508
Interest cost	737	726	1,473	1,476
Expected return on plan assets	(647)	(645)	(1,294)	(1,356)
Amortization of prior service cost	(127)	(137)	(254)	(274)
Amortization of actuarial loss	291	220	583	487
Net periodic benefit cost	$ 509	$ 417	$ 1,018	$ 841

Water And Wastewater Rates (Details) $ in Thousands	6 Months Ended
Water And Wastewater Rates (Details) $ in Thousands	Jun. 30, 2017 USD ($)
Indiana And Ohio [Member]
Water And Wastewater Rates [Line Items]
Base rate increase designed to increase total operating revenues on an annual basis	$ 7,403
Illinois And North Carolina [Member]
Water And Wastewater Rates [Line Items]
Infrastructure rehabilitation surcharges	$ 3,659

Taxes Other Than Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Taxes Other Than Income [Line Items]
Total taxes other than income	$ 14,419	$ 14,242	$ 29,156	$ 28,382
Property [Member]
Taxes Other Than Income [Line Items]
Total taxes other than income	6,867	6,928	13,652	13,113
Gross Receipts, Excise And Franchise [Member]
Taxes Other Than Income [Line Items]
Total taxes other than income	3,363	3,113	6,538	6,059
Payroll [Member]
Taxes Other Than Income [Line Items]
Total taxes other than income	2,132	2,299	5,256	5,635
Regulatory Assessments [Member]
Taxes Other Than Income [Line Items]
Total taxes other than income	630	681	1,259	1,352
Pumping Fees [Member]
Taxes Other Than Income [Line Items]
Total taxes other than income	1,350	1,140	2,294	2,059
Other [Member]
Taxes Other Than Income [Line Items]
Total taxes other than income	$ 77	$ 81	$ 157	$ 164

Segment Information (Narrative) (Details)	6 Months Ended
Segment Information (Narrative) (Details)	Jun. 30, 2017 segment
Segment Reporting Information [Line Items]
Operating Segments	10
Reportable Segments	1
Reportable Segment [Member]
Segment Reporting Information [Line Items]
Operating Segments	8
Other [Member]
Segment Reporting Information [Line Items]
Operating Segments	2

Segment Information (Company's Segment Information, Continuing Operations) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Segment Reporting Information [Line Items]
Operating revenues	$ 203,418	$ 203,876	$ 391,205	$ 396,483
Operations and maintenance expense	70,853	73,994	139,981	147,535
Depreciation	33,407	31,619	67,244	63,764
Operating income	84,612	83,493	154,508	155,824
Interest expense, net	21,387	20,115	42,713	39,968
Allowance for funds used during construction	3,463	1,871	6,656	4,179
Income tax expense (benefit)	5,569	5,515	8,499	8,522
Net income (loss)	60,968	59,626	110,040	111,363
Capital expenditures			208,472	168,587
Regulated [Member]
Segment Reporting Information [Line Items]
Operating revenues	201,960	198,086	388,309	384,092
Operations and maintenance expense	72,560	69,676	140,070	137,001
Depreciation	34,141	32,214	67,807	64,420
Operating income	81,152	82,018	152,219	154,868
Interest expense, net	19,747	19,093	39,524	37,894
Allowance for funds used during construction	3,463	1,871	6,656	4,179
Income tax expense (benefit)	5,249	5,910	9,105	9,583
Net income (loss)	59,629	59,004	110,525	111,898
Capital expenditures			208,174	167,900
Other [Member]
Segment Reporting Information [Line Items]
Operating revenues	1,458	5,790	2,896	12,391
Operations and maintenance expense	(1,707)	4,318	(89)	10,534
Depreciation	(734)	(595)	(563)	(656)
Operating income	3,460	1,475	2,289	956
Interest expense, net	1,640	1,022	3,189	2,074
Allowance for funds used during construction
Income tax expense (benefit)	320	(395)	(606)	(1,061)
Net income (loss)	$ 1,339	$ 622	(485)	(535)
Capital expenditures			$ 298	$ 687

Segment Information (Company's Segment Information, Assets) (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Total assets	$ 6,383,699	$ 6,158,991
Other [Member]
Segment Reporting Information [Line Items]
Total assets	238,410	205,289
Regulated [Member]
Segment Reporting Information [Line Items]
Total assets	$ 6,145,289	$ 5,953,702

Commitments And Contingencies (Details) $ in Thousands	Jun. 30, 2017 USD ($)
Commitments And Contingencies [Abstract]
Aggregate amount accrued for loss contingencies	$ 15,259
Amount probable of recovery through insurance	3,407
Insurance reserve for employee medical benefit program	$ 1,770

Income Taxes (Details) - USD ($)	3 Months Ended		6 Months Ended
Income Taxes (Details) - USD ($)	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Income Taxes [Line Items]
Unrecognized tax benefits	$ 28,464,000		$ 28,464,000		$ 28,099,000
Effective income tax rate	8.40%	8.50%	7.20%	7.10%
Unrecognized tax benefits that would impact effective tax rate	$ 22,364,000		$ 22,364,000
Federal [Member]
Income Taxes [Line Items]
Change in operating loss carryforward			15,986,000
Operating loss carryforwards	97,158,000		97,158,000
Operating loss carryforwards, valuation allowance	0		$ 0
Operating loss carryforwards, expiration beginning dates			Jan. 01, 2032
Unrecognized tax benefits	63,631,000		$ 63,631,000
Deferred tax assets, operating loss carryforwards	160,789,000		160,789,000
State [Member]
Income Taxes [Line Items]
Change in operating loss carryforward			11,925,000
Operating loss carryforwards	587,066,000		$ 587,066,000
Operating loss carryforwards, expiration beginning dates			Jan. 01, 2023
Unrecognized tax benefits	85,232,000		$ 85,232,000
Deferred tax assets, operating loss carryforwards	$ 672,298,000		$ 672,298,000

Recent Accounting Pronouncements (Details) $ in Thousands	Jan. 01, 2017 USD ($)
Adjustments for New Accounting Principle, Early Adoption [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Adjustment to retained earnings, before tax	$ 982