The York Water Company (YORW) 10-Q 3 Aug 17 2017 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2017	Aug. 03, 2017
Document and Entity Information [Abstract]
Entity Registrant Name	YORK WATER CO
Entity Central Index Key	108,985
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		12,847,840
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q2
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2017

Balance Sheets (Unaudited)

Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
ASSETS
UTILITY PLANT, at original cost	$ 358,456	$ 343,412
Plant acquisition adjustments	(3,263)	(3,667)
Accumulated depreciation	(71,855)	(68,838)
Net utility plant	283,338	270,907
OTHER PHYSICAL PROPERTY, net of accumulated depreciation of $365 in 2017 and $353 in 2016	735	745
CURRENT ASSETS:
Cash and cash equivalents	2	4,209
Accounts receivable, net of reserves of $325 in 2017 and $305 in 2016	4,234	4,296
Unbilled revenues	2,492	2,429
Recoverable income taxes	0	282
Materials and supplies inventories, at cost	775	746
Prepaid expenses	897	658
Total current assets	8,400	12,620
OTHER LONG-TERM ASSETS:
Notes receivable	255	255
Deferred regulatory assets	33,440	33,027
Other assets	3,088	2,940
Total other long-term assets	36,783	36,222
Total Assets	329,256	320,494
COMMON STOCKHOLDERS' EQUITY:
Common stock, no par value, authorized 46,500,000 shares, shares issued 12,845,989 in 2017 and 12,852,295 in 2016, shares outstanding 12,845,989 in 2017 and 12,852,295 in 2016	78,302	78,513
Retained earnings	36,948	35,548
Total common stockholders' equity	115,250	114,061
PREFERRED STOCK, authorized 500,000 shares, no shares issued	0	0
LONG-TERM DEBT, excluding current portion	88,166	84,609
COMMITMENTS
CURRENT LIABILITIES:
Current portion of long-term debt	44	44
Accounts payable	5,148	3,669
Dividends payable	1,802	1,803
Accrued compensation and benefits	1,197	1,233
Accrued income taxes	157	0
Accrued interest	984	921
Other accrued expenses	467	514
Total current liabilities	9,799	8,184
DEFERRED CREDITS:
Customers' advances for construction	7,483	7,102
Deferred income taxes	56,750	54,169
Deferred employee benefits	8,297	8,990
Other deferred credits	6,678	6,725
Total deferred credits	79,208	76,986
Contributions in aid of construction	36,833	36,654
Total Stockholders' Equity and Liabilities	$ 329,256	$ 320,494

Balance Sheets (Unaudited) (Par

Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
ASSETS
Other physical property, accumulated depreciation	$ 365	$ 353
CURRENT ASSETS:
Accounts receivables, reserves	$ 325	$ 305
COMMON STOCKHOLDERS' EQUITY:
Common stock, par value (in dollars per share)	$ 0	$ 0
Common stock, authorized (in shares)	46,500,000	46,500,000
Common stock, issued (in shares)	12,845,989	12,852,295
Common stock, outstanding (in shares)	12,845,989	12,852,295
Preferred stock, authorized (in shares)	500,000	500,000
Preferred stock, issued (in shares)	0	0

Statements of Income (Unaudited

Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
OPERATING REVENUES:
Residential	$ 7,886	$ 7,491	$ 15,145	$ 14,722
Commercial and industrial	3,450	3,435	6,589	6,580
Other	918	894	1,810	1,796
Operating Revenues	12,254	11,820	23,544	23,098
OPERATING EXPENSES:
Operation and maintenance	2,262	2,028	4,288	3,921
Administrative and general	2,489	2,274	4,882	4,488
Depreciation and amortization	1,686	1,555	3,367	3,182
Taxes other than income taxes	288	268	621	598
Operating Expenses	6,725	6,125	13,158	12,189
Operating income	5,529	5,695	10,386	10,909
OTHER INCOME (EXPENSES):
Interest on debt	(1,326)	(1,316)	(2,642)	(2,621)
Allowance for funds used during construction	196	47	319	100
Other income (expenses), net	(94)	(99)	(220)	(262)
Other Income (Expenses)	(1,224)	(1,368)	(2,543)	(2,783)
Income before income taxes	4,305	4,327	7,843	8,126
Income taxes	1,370	1,480	2,327	2,793
Net Income	$ 2,935	$ 2,847	$ 5,516	$ 5,333
Basic Earnings Per Share (in dollars per share)	$ 0.23	$ 0.23	$ 0.43	$ 0.42
Diluted Earnings Per Share (in dollars per share)	0.23	0.23	0.43	0.42
Cash Dividends Declared Per Share (in dollars per share)	$ 0.1602	$ 0.1555	$ 0.3204	$ 0.3110

Statements of Common Stockholde

Statements of Common Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Common Stock [Member]	Retained Earnings [Member]	Total
Balance at Dec. 31, 2015	$ 77,317	$ 31,753	$ 109,070
Balance (in shares) at Dec. 31, 2015	12,812,377
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 0	5,333	5,333
Dividends	0	(3,994)	$ (3,994)
Retirement of common stock (in shares)			0
Issuance of common stock under dividend reinvestment, direct stock and employee stock purchase plans	$ 1,568	0	$ 1,568
Issuance of common stock under dividend reinvestment, direct stock and employee stock purchase plans (in shares)	55,359
Balance at Jun. 30, 2016	$ 78,885	33,092	111,977
Balance (in shares) at Jun. 30, 2016	12,867,736
Balance at Dec. 31, 2016	$ 78,513	35,548	$ 114,061
Balance (in shares) at Dec. 31, 2016	12,852,295		12,852,295
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 0	5,516	$ 5,516
Dividends	0	(4,116)	(4,116)
Retirement of common stock	$ (1,263)	0	$ (1,263)
Retirement of common stock (in shares)	(37,229)		(37,229)
Issuance of common stock under dividend reinvestment, direct stock and employee stock purchase plans	$ 1,018	0	$ 1,018
Issuance of common stock under dividend reinvestment, direct stock and employee stock purchase plans (in shares)	29,418
Stock-based compensation	$ 34	0	34
Stock-based compensation (in shares)	1,505
Balance at Jun. 30, 2017	$ 78,302	$ 36,948	$ 115,250
Balance (in shares) at Jun. 30, 2017	12,845,989		12,845,989

Statements of Cash Flows (Unaud

Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 5,516	$ 5,333
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	3,367	3,182
Stock-based compensation	34	0
Increase in deferred income taxes	1,381	607
Other	84	170
Changes in assets and liabilities:
Increase in accounts receivable and unbilled revenues	(154)	(252)
Decrease in recoverable income taxes	282	1,039
Increase in materials and supplies, prepaid expenses, regulatory and other assets	(2,537)	(1,091)
Increase (decrease) in accounts payable, accrued compensation and benefits, accrued expenses, deferred employee benefits, and other deferred credits	1,173	(736)
Increase in accrued interest and taxes	220	4
Net cash provided by operating activities	9,366	8,256
CASH FLOWS FROM INVESTING ACTIVITIES:
Utility plant additions, including debt portion of allowance for funds used during construction of $178 in 2017 and $56 in 2016	(13,867)	(5,009)
Acquisitions of water and wastewater systems	(472)	(29)
Cash received from surrender of life insurance policies	0	596
Net cash used in investing activities	(14,339)	(4,442)
CASH FLOWS FROM FINANCING ACTIVITIES:
Customers' advances for construction and contributions in aid of construction	773	892
Repayments of customer advances	(213)	(155)
Proceeds of long-term debt issues	7,911	0
Repayments of long-term debt	(4,426)	(22)
Changes in cash overdraft position	1,083	0
Repurchase of common stock	(1,263)	0
Issuance of common stock	1,018	1,568
Dividends paid	(4,117)	(3,967)
Net cash provided by (used in) financing activities	766	(1,684)
Net change in cash and cash equivalents	(4,207)	2,130
Cash and cash equivalents at beginning of period	4,209	2,879
Cash and cash equivalents at end of period	2	5,009
Cash paid during the period for:
Interest, net of amounts capitalized	2,329	2,491
Income taxes	$ 20	$ 660
Supplemental disclosure of non-cash investing and financing activities:
Accounts payable includes $3,162 in 2017 and $645 in 2016 for the construction of utility plant

Statements of Cash Flows (Unau7

Statements of Cash Flows (Unaudited) (Parenthetical) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
CASH FLOWS FROM INVESTING ACTIVITIES:
Utility plant additions, debt portion of allowance for funds used during construction	$ 178	$ 56
Supplemental disclosure of non-cash investing and financing activities:
Accounts payable, construction of utility plant	$ 3,162	$ 645

Basis of Presentation

Basis of Presentation	6 Months Ended
	Jun. 30, 2017
Basis of Presentation [Abstract]
Basis of Presentation	1. Basis of Presentation The interim financial statements are unaudited but, in the opinion of management, reflect all adjustments, consisting of only normal recurring accruals, necessary for a fair presentation of results for such periods. Because the financial statements cover an interim period, they do not include all disclosures and notes normally provided in annual financial statements, and therefore, should be read in conjunction with the financial statements and notes thereto contained in the Company's Annual Report on Form 10-K for the year ended December 31, 2016. Operating results for the three and six month periods ended June 30, 2017 are not necessarily indicative of the results that may be expected for the year ending December 31, 2017.

Common Stock and Earnings Per S

Common Stock and Earnings Per Share	6 Months Ended
	Jun. 30, 2017
Common Stock and Earnings Per Share [Abstract]
Common Stock and Earnings Per Share	2. Common Stock and Earnings Per Share Net income of $2,935 and $2,847 for the three months ended June 30, 2017 and 2016, respectively, and $5,516 and $5,333 for the six months ended June 30, 2017 and 2016 respectively, is used to calculate both basic and diluted earnings per share. Basic earnings per share is based on the weighted average number of common shares outstanding. Diluted earnings per share is based on the weighted average number of common shares outstanding plus potentially dilutive shares. The dilutive effect of employee stock-based compensation is included in the computation of diluted earnings per share and is calculated using the treasury stock method and expected proceeds upon exercise or issuance of the stock-based compensation. The following table summarizes the shares used in computing basic and diluted earnings per share. Three Months Ended June 30 Six Months Ended June 30 2017 2016 2017 2016 Weighted average common shares, basic 12,839,968 12,849,884 12,844,500 12,835,495 Effect of dilutive securities: Employee stock-based compensation 80 - 81 - Weighted average common shares, diluted 12,840,048 12,849,884 12,844,581 12,835,495 On March 11, 2013, the Board of Directors, or the Board, authorized a share repurchase program granting the Company authority to repurchase up to 1,200,000 shares of the Company's common stock from time to time. The stock repurchase program has no specific end date and the Company may repurchase shares in the open market or through privately negotiated transactions. The Company may suspend or discontinue the repurchase program at any time. During the three and six months ended June 30, 2017, the Company repurchased 12,900 and 37,229 shares respectively. No shares were repurchased during the three or six months ended June 30, 2016. As of June 30, 2017, 618,004 shares remain authorized for repurchase.

Commitments

Commitments	6 Months Ended
	Jun. 30, 2017
Commitments [Abstract]
Commitments	3. Commitments The Company has committed to capital expenditures of approximately $11,598 for an additional raw water pumping station and force main, of which $3,490 remains to be incurred as of June 30, 2017. The Company may make additional commitments for this project in 2017. During its triennial testing completed in 2016, the Company determined it exceeded the action level for lead at the customer's tap as established by the Lead and Copper Rule, or LCR, issued by the U.S. Environmental Protection Agency. The rule allows the Company to have five samples of the 50 high-risk homes tested exceed the action level of 15 parts per billion, or PPB. The testing found that six properties with lead service lines, all built before 1935, exceeded the action level, and the reported exceedance amount was 1 PPB. The Company has determined that only 3% of the company-owned service lines in the system are lead. The Company will be required, per the LCR, to engage in more frequent testing for lead, public education, and annually replace 7% of the remaining company-owned lead service lines in its distribution system. The Company has announced plans to perform in excess of the required actions. Specifically, the Company will provide the affected customers with a free water test and a 200 gallon per month credit to flush their line in order to reduce any lead content until their lead service line has been replaced. The cost of the water tests and flushing credits was $4 for the three months ended June 30, 2017 and $11 for the six months ended June 30, 2017. Additional amounts for water tests and flushing credits are not expected to have a material impact on the financial position of the Company over the remaining three and a half years. In addition, the Company has entered into a consent order agreement with the Pennsylvania Department of Environmental Protection. Under the agreement, the Company has committed to exceed the LCR replacement schedule by replacing all of the remaining company-owned lead service lines within the next three and a half years. The cost for these service line replacements was approximately $1,030 through June 30, 2017 and is included in utility plant. Additional replacements are expected to be approximately $1,600 over the next three and a half years, and will be integrated into the Company's annual capital budgets. Finally, the Company has been granted approval by the PPUC to modify its tariff to include the cost of the replacement of lead customer-owned service lines that are discovered when the Company replaces its lead service lines over the next three and a half years, and to include the cost of the annual replacement of up to 400 lead customer-owned service lines whenever they are discovered, regardless of the material used for the Company-owned service line over nine years. The tariff modification allows the Company to replace customer-owned service lines at its own initial cost. The Company will record the costs as a regulatory asset to be recovered in future base rates to customers, over a reasonable period of at least four but not more than six years. The cost for the customer-owned lead service line replacements under the four-year tariff modification was approximately $93 through June 30, 2017 and is included as a regulatory asset. Additional replacements are expected to be approximately $130 under the four-year tariff modification, assuming the average percentage of customer-owned lead service lines that were replaced when company-owned lead service lines were replaced through June 30, 2017 remains consistent over the entire replacement period. The Company is unable to predict how many lead customer-owned service lines are in use, and, therefore, its current estimate of $1,040 for replacements under the nine-year tariff modification is subject to adjustment as more facts become available.

Pensions

Pensions	6 Months Ended
	Jun. 30, 2017
Pensions [Abstract]
Pensions	4. Pensions Components of Net Periodic Pension Cost Three Months Ended June 30 Six Months Ended June 30 2017 2016 2017 2016 Service cost $ 270 $ 255 $ 540 $ 509 Interest cost 398 400 796 800 Expected return on plan assets (598 ) (559 ) (1,197 ) (1,117 ) Amortization of actuarial loss 123 140 246 280 Amortization of prior service cost (3 ) (3 ) (6 ) (6 ) Rate-regulated adjustment 385 342 771 684 Net periodic pension expense $ 575 $ 575 $ 1,150 $ 1,150 Employer Contributions The Company previously disclosed in its financial statements for the year ended December 31, 2016 that it expected to contribute $2,300 to its pension plans in 2017. For the six months ended

Debt

Debt	6 Months Ended
	Jun. 30, 2017
Debt [Abstract]
Debt	5. Debt As of Jun. 30, 2017 As of Dec. 31, 2016 10.17% Senior Notes, Series A, due 2019 $ 6,000 $ 6,000 9.60% Senior Notes, Series B, due 2019 5,000 5,000 1.00% Pennvest Note, due 2019 96 118 10.05% Senior Notes, Series C, due 2020 6,500 6,500 8.43% Senior Notes, Series D, due 2022 7,500 7,500 Variable Rate Pennsylvania Economic Development Financing Authority Exempt Facilities Revenue Refunding Bonds, Series 2008A, due 2029 12,000 12,000 4.75% York County Industrial Development Authority Revenue Bonds, Series 2006, due 2036 10,500 10,500 4.50% Pennsylvania Economic Development Financing Authority Exempt Facilities Revenue Refunding Bonds, Series 2014, due 2038 14,870 14,870 5.00% Monthly Senior Notes, Series 2010A, due 2040 15,000 15,000 4.00% - 4.50% York County Industrial Development Authority Exempt Facilities Revenue Bonds, Series 2015, due 2029 - 2045 10,000 10,000 Committed Line of Credit, due 2019 3,507 - Total long-term debt 90,973 87,488 Less discount on issuance of long-term debt (220 ) (226 ) Less unamortized debt issuance costs (2,543 ) (2,609 ) Less current maturities (44 ) (44 ) Long-term portion 88,166 84,609 In the second quarter of 2017, the Company renewed its $13,000 and $11,000 committed lines of credit and extended the maturity date of each to May 2019. In addition, the Company renewed its $7,500 line of credit and extended the maturity date to June 2018.

Interest Rate Swap Agreement

Interest Rate Swap Agreement	6 Months Ended
	Jun. 30, 2017
Interest Rate Swap Agreement [Abstract]
Interest Rate Swap Agreement	6. Interest Rate Swap Agreement The Company is exposed to certain risks relating to its ongoing business operations. The primary risk managed by using derivative instruments is interest rate risk. The Company utilizes an interest rate swap agreement to effectively convert the Company's $12,000 variable-rate debt issue to a fixed rate. Interest rate swaps are contracts in which a series of interest rate cash flows are exchanged over a prescribed period. The notional amount on which the interest payments are based ($12,000) is not exchanged. The interest rate swap provides that the Company pays the counterparty a fixed interest rate of 3.16% on the notional amount of $12,000. In exchange, the counterparty pays the Company a variable interest rate based on 59% of the U.S. Dollar one-month LIBOR rate on the notional amount. The intent is for the variable rate received from the swap counterparty to approximate the variable rate the Company pays to bondholders on its variable rate debt issue, resulting in a fixed rate being paid to the swap counterparty and reducing the Company's interest rate risk. The Company's net payment rate on the swap was 2.53% and 2.88% during the three months that ended June 30, 2017 and 2016, respectively, and 2.59% and 2.84% for the six months that ended June 30, 2017 and 2016, respectively. The interest rate swap agreement is classified as a financial derivative used for non-trading activities. The accounting standards regarding accounting for derivatives and hedging activities require companies to recognize all derivative instruments as either assets or liabilities at fair value on the balance sheet. In accordance with the standards, the interest rate swap is recorded on the balance sheet in other deferred credits at fair value (see Note 7). The Company uses regulatory accounting treatment rather than hedge accounting to defer the unrealized gains and losses on its interest rate swap. Instead of the effective portion being recorded as other comprehensive income or loss and the ineffective portion being recognized in earnings using the cash flow hedge accounting rules provided by the derivative accounting standards, the entire unrealized swap value is recorded as a regulatory asset. Based on current ratemaking treatment, the Company expects the unrealized gains and losses to be recognized in rates as a component of interest expense as the swap settlements occur. Swap settlements are recorded in the income statement with the hedged item as interest expense. Swap settlements resulted in the reclassification from regulatory assets to interest expense $76 and $86 during the three month period ended June 30, 2017 and 2016, respectively, and $155 and $173 for the six month period ended June 30, 2017 and 2016, respectively. The overall swap result was a loss of $120 and $334 for the three months ended June 30, 2017 and 2016, respectively, and a loss of $129 and $843 for the six months ended June 30, 2017 and 2016, respectively. The Company expects to reclassify $281 from regulatory assets to interest expense as a result of swap settlements over the next 12 months. The interest rate swap agreement contains provisions that require the Company to maintain a credit rating of at least BBB- with Standard & Poor's. If the Company's rating were to fall below this rating, it would be in violation of these provisions, and the counterparty to the derivative could request immediate payment if the derivative was in a liability position. On April 21, 2017, Standard & Poor's affirmed the Company's credit rating at A-, with a stable outlook and adequate liquidity. The Company's interest rate swap was in a liability position as of June 30, 2017. If a violation due to credit rating, or some other default provision, were triggered on June 30, 2017, the Company would have been required to pay the counterparty approximately $2,401. The interest rate swap will expire on October 1, 2029. Other than the interest rate swap, the Company has no other derivative instruments.

Fair Value Measurements

Fair Value Measurements	6 Months Ended
	Jun. 30, 2017
Fair Value Measurements [Abstract]
Fair Value Measurements	7. Fair Value Measurements The accounting standards regarding fair value measurements establish a fair value hierarchy which indicates the extent to which inputs used in measuring fair value are observable in the market. Level 1 inputs include quoted prices for identical instruments and are the most observable. Level 2 inputs include quoted prices for similar assets and observable inputs such as interest rates, commodity rates and yield curves. Level 3 inputs are not observable in the market and include management's own judgments about the assumptions market participants would use in pricing the asset or liability. The Company has recorded its interest rate swap liability at fair value in accordance with the standards. The liability is recorded under the caption "Other deferred credits" on the balance sheet. The table below illustrates the fair value of the interest rate swap as of the end of the reporting period. Description June 30, 2017 Fair Value Measurements at Reporting Date Using Significant Other Observable Inputs (Level 2) Interest Rate Swap $2,263 $2,263 Fair values are measured as the present value of all expected future cash flows based on the LIBOR-based swap yield curve as of the date of the valuation. These inputs to this calculation are deemed to be Level 2 inputs. The balance sheet carrying value reflects the Company's credit quality as of June 30, 2017. The rate used in discounting all prospective cash flows anticipated to be made under this swap reflects a representation of the yield to maturity for 30-year debt on utilities rated A- as of June 30, 2017. The use of the Company's credit rating resulted in a reduction in the fair value of the swap liability of $138 as of June 30, 2017. The fair value of the swap reflecting the Company's credit quality as of December 31, 2016 is shown in the table below. Description December 31, 2016 Fair Value Measurements at Reporting Date Using Significant Other Observable Inputs (Level 2) Interest Rate Swap $2,292 $2,292 The carrying amount of current assets and liabilities that are considered financial instruments approximates fair value as of the dates presented. The Company's total long-term debt, with a carrying value of $90,973 at June 30, 2017, and $87,488 at December 31, 2016, had an estimated fair value of approximately $103,000 and $99,000, respectively. The estimated fair value of debt was calculated using a discounted cash flow technique that incorporates a market interest yield curve with adjustments for duration and risk profile. These inputs to this calculation are deemed to be Level 2 inputs. The Company recognized its credit rating in determining the yield curve, and did not factor in third party credit enhancements including bond insurance on the 2006 York County Industrial Development Authority issue and the letter of credit on the 2008 Pennsylvania Economic Development Financing Authority Series A issue. Customers' advances for construction and notes receivable had carrying values at June 30, 2017 of $7,483 and $255, respectively. At December 31, 2016, customers' advances for construction and notes receivable had carrying values of $7,102 and $255, respectively. The relative fair values of these amounts cannot be accurately estimated since the timing of future payment streams is dependent upon several factors, including new customer connections, customer consumption levels and future rate increases.

Income Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2017
Income Taxes [Abstract]
Income Taxes	8. Income Taxes The Company filed for a change in accounting method under the Internal Revenue Service tangible property regulations effective in 2014. Under the change in accounting method, the Company is permitted to deduct the costs of certain asset improvements that were previously being capitalized and depreciated for tax purposes as an expense on its income tax return. This ongoing deduction results in a reduction in the effective income tax rate, a net reduction in income tax expense, and a reduction in the amount of income taxes currently payable. It also results in increases to deferred tax liabilities and regulatory assets representing the appropriate book and tax basis difference on capital additions. As a result, the Company's effective tax rate was 31.8% and 34.2% for the three months ended June 30, 2017 and 2016, respectively, and 29.7% and 34.4% for the six months ended June 30, 2017 and 2016, respectively. The effective tax rate will vary depending on the level of eligible asset improvements that are placed in service each period, which level was higher during the first six months of 2017 as compared to the first six months of 2016.

Acquisitions

Acquisitions	6 Months Ended
	Jun. 30, 2017
Acquisitions [Abstract]
Acquisitions	9. Acquisitions On January 6, 2017, the Company completed the acquisition of the water assets of Stockham's Village Mobile Home Park in Adams County, Pennsylvania. The Company began operating the existing system through an interconnection with its current distribution system on January 9, 2017. The acquisition resulted in the addition of approximately 80 new water customers with purchase price and acquisition costs of approximately $24. The purchase price and acquisition costs were more than the depreciated original cost of the assets. The Company recorded an acquisition adjustment of approximately $17 and will seek approval from the Pennsylvania Public Utility Commission, or PPUC, to amortize the acquisition adjustment over the remaining life of the acquired assets. On February 23, 2017, the Company completed the acquisition of the wastewater collection assets of West York Borough in York County, Pennsylvania. The Company began operating the existing collection facilities on February 27, 2017. The acquisition resulted in the addition of approximately 1,700 wastewater customers, representing more than 2,200 units, with purchase price and acquisition costs of approximately $448. The purchase price and acquisition costs were more than the depreciated original cost of the assets. The Company recorded an acquisition adjustment of approximately $358 and will seek approval from the PPUC to amortize the acquisition adjustment over the remaining life of the acquired assets. The result of these acquisitions has been immaterial to total Company results.

Stock-Based Compensation

Stock-Based Compensation	6 Months Ended
	Jun. 30, 2017
Stock-Based Compensation [Abstract]
Stock-Based Compensation	10. Stock-Based Compensation On May 2, 2016, the Company's stockholders approved The York Water Company Long-Term Incentive Plan, or LTIP. The LTIP was adopted to provide the incentive of long-term stock-based awards to officers, directors and key employees. The LTIP provides for the granting of nonqualified stock options, incentive stock options, stock appreciation rights, performance restricted stock grants and units, restricted stock grants and units, and unrestricted stock grants. A maximum of 100,000 shares of common stock may be issued under the LTIP over the ten-year life of the plan. The maximum number of shares of common stock subject to awards that may be granted to any participant in any one calendar year is 2,000. Shares of common stock issued under the LTIP may be treasury shares or authorized but unissued shares. The LTIP will be administered by the Compensation Committee of the Board, or the full Board, provided that the full Board will administer the LTIP as it relates to awards to non-employee directors of the Company. The Company filed a registration statement with the Securities and Exchange Commission on May 11, 2016 covering the offering of stock under the LTIP. The LTIP was effective on July 1, 2016. On April 26, 2017, the Board awarded stock to non-employee directors effective May 1, 2017. This stock award vested immediately. On April 26, 2017, the Compensation Committee awarded restricted stock to officers and key employees effective May 1, 2017. This restricted stock award vests ratably over three years beginning May 1, 2017. In addition, the Board of Directors accelerated the vesting period for restricted stock granted in 2016 to two retiring officers from three years to their 2017 retirement dates. The Company will recognize the acceleration on the books from the approval date to the retirement dates. The restricted stock awards provide the grantee with the rights of a shareholder, including the right to receive dividends and to vote such shares, but not the right to sell or otherwise transfer the shares during the restriction period. As a result, the awards are included in common shares outstanding on the balance sheet. Restricted stock awards result in compensation expense valued at the fair market value of the stock on the date of the grant and are amortized ratably over the restriction period. The following tables summarize the stock grant amounts and activity for the six months ended June 30, 2017. Number of Shares Grant Date Weighted Average Fair Value Nonvested at beginning of the period 660 $37.20 Granted 1,505 $38.00 Vested (711) $38.00 Forfeited - - Nonvested at end of the period 1,454 $37.64 For the three months ended June 30, 2017, the statement of income includes $32 of stock-based compensation and related recognized tax benefits of $13. For the six months ended June 30, 2017, the statement of income includes $34 of stock-based compensation and related recognized tax benefits of $14. The total fair value of the shares vested in the six months ended June 30, 2017 was $27. Total stock-based compensation related to nonvested awards not yet recognized is $47 which will be recognized over the next three years.

Rate Matters

Rate Matters	6 Months Ended
	Jun. 30, 2017
Rate Matters [Abstract]
Rate Matters	11. Rate Matters From time to time, the Company files applications for rate increases with the PPUC and is granted rate relief as a result of such requests. Most recently, the PPUC authorized an increase in rates effective February 28, 2014. The PPUC permits water utilities to collect a distribution system improvement charge, or DSIC. The DSIC allows the Company to add a charge to customers' bills for qualified replacement costs of certain infrastructure without submitting a rate filing. This surcharge mechanism typically adjusts periodically based on additional qualified capital expenditures completed or anticipated in a future period. The DSIC is capped at 5% of base rates, and is reset to zero when new base rates that reflect the costs of those additions become effective or when a utility's earnings exceed a regulatory benchmark. During its most recent quarterly reporting period, the Company's earnings were below the regulatory benchmark and the Company began recognizing DSIC in June 2017 for bills rendered after July 1, 2017 that included June consumption. The DSIC provided revenues of $62 for the three and six months ended June 30, 2017 and $0 for the three and six months ended June 30, 2016.

Impact of Recent Accounting Pro

Impact of Recent Accounting Pronouncements	6 Months Ended
	Jun. 30, 2017
Impact of Recent Accounting Pronouncements [Abstract]
Impact of Recent Accounting Pronouncements	12. Impact of Recent Accounting Pronouncements In May 2017, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2017-09, Compensation – Stock Compensation (Topic 718): Scope of Modification Accounting . This ASU clarifies when a change to the terms or conditions of a share-based payment award must be accounted for as a modification. The guidance requires modification accounting if the fair value, vesting condition or the classification of the award is not the same immediately before and after a change to the terms and conditions of the award. The ASU is effective for annual periods beginning after December 15, 2017, and interim periods within those fiscal years, with early adoption available. The Company does not expect the adoption of this standard to have a material impact on its financial position, results of operations and cash flows. In March 2017, the FASB issued ASU No. 2017-07, Compensation – Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Post-Retirement Benefit Cost . This ASU requires employers to report the service cost component in the same line item as other compensation costs arising from services rendered by employees during the reporting period. The other components of net benefit costs will be presented in the income statement separately from the service cost and outside of a subtotal of income from operations. In addition, only the service cost component may be eligible for capitalization where applicable. The ASU is effective for annual periods beginning after December 15, 2017, and interim periods within those fiscal years, with early adoption available. The Company is currently assessing the impact of the adoption of the standard. In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers. Revenue from Contracts with Customers (Topic 606): Deferral of the Effective Date

Impact of Recent Accounting P20

Impact of Recent Accounting Pronouncements (Policies)	6 Months Ended
	Jun. 30, 2017
Impact of Recent Accounting Pronouncements [Abstract]
Impact of Recent Accounting Pronouncements	In May 2017, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2017-09, Compensation – Stock Compensation (Topic 718): Scope of Modification Accounting . This ASU clarifies when a change to the terms or conditions of a share-based payment award must be accounted for as a modification. The guidance requires modification accounting if the fair value, vesting condition or the classification of the award is not the same immediately before and after a change to the terms and conditions of the award. The ASU is effective for annual periods beginning after December 15, 2017, and interim periods within those fiscal years, with early adoption available. The Company does not expect the adoption of this standard to have a material impact on its financial position, results of operations and cash flows. In March 2017, the FASB issued ASU No. 2017-07, Compensation – Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Post-Retirement Benefit Cost . This ASU requires employers to report the service cost component in the same line item as other compensation costs arising from services rendered by employees during the reporting period. The other components of net benefit costs will be presented in the income statement separately from the service cost and outside of a subtotal of income from operations. In addition, only the service cost component may be eligible for capitalization where applicable. The ASU is effective for annual periods beginning after December 15, 2017, and interim periods within those fiscal years, with early adoption available. The Company is currently assessing the impact of the adoption of the standard. In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers. Revenue from Contracts with Customers (Topic 606): Deferral of the Effective Date

Common Stock and Earnings Per21

Common Stock and Earnings Per Share (Tables)	6 Months Ended
	Jun. 30, 2017
Common Stock and Earnings Per Share [Abstract]
Shares Used in Computing Basic and Diluted Net Income per Share	Net income of $2,935 and $2,847 for the three months ended June 30, 2017 and 2016, respectively, and $5,516 and $5,333 for the six months ended June 30, 2017 and 2016 respectively, is used to calculate both basic and diluted earnings per share. Basic earnings per share is based on the weighted average number of common shares outstanding. Diluted earnings per share is based on the weighted average number of common shares outstanding plus potentially dilutive shares. The dilutive effect of employee stock-based compensation is included in the computation of diluted earnings per share and is calculated using the treasury stock method and expected proceeds upon exercise or issuance of the stock-based compensation. The following table summarizes the shares used in computing basic and diluted earnings per share. Three Months Ended June 30 Six Months Ended June 30 2017 2016 2017 2016 Weighted average common shares, basic 12,839,968 12,849,884 12,844,500 12,835,495 Effect of dilutive securities: Employee stock-based compensation 80 - 81 - Weighted average common shares, diluted 12,840,048 12,849,884 12,844,581 12,835,495

Pensions (Tables)

Pensions (Tables)	6 Months Ended
	Jun. 30, 2017
Pensions [Abstract]
Components of Net Periodic Pension Cost	Components of Net Periodic Pension Cost Three Months Ended June 30 Six Months Ended June 30 2017 2016 2017 2016 Service cost $ 270 $ 255 $ 540 $ 509 Interest cost 398 400 796 800 Expected return on plan assets (598 ) (559 ) (1,197 ) (1,117 ) Amortization of actuarial loss 123 140 246 280 Amortization of prior service cost (3 ) (3 ) (6 ) (6 ) Rate-regulated adjustment 385 342 771 684 Net periodic pension expense $ 575 $ 575 $ 1,150 $ 1,150

Debt (Tables)

Debt (Tables)	6 Months Ended
	Jun. 30, 2017
Debt [Abstract]
Debt	As of Jun. 30, 2017 As of Dec. 31, 2016 10.17% Senior Notes, Series A, due 2019 $ 6,000 $ 6,000 9.60% Senior Notes, Series B, due 2019 5,000 5,000 1.00% Pennvest Note, due 2019 96 118 10.05% Senior Notes, Series C, due 2020 6,500 6,500 8.43% Senior Notes, Series D, due 2022 7,500 7,500 Variable Rate Pennsylvania Economic Development Financing Authority Exempt Facilities Revenue Refunding Bonds, Series 2008A, due 2029 12,000 12,000 4.75% York County Industrial Development Authority Revenue Bonds, Series 2006, due 2036 10,500 10,500 4.50% Pennsylvania Economic Development Financing Authority Exempt Facilities Revenue Refunding Bonds, Series 2014, due 2038 14,870 14,870 5.00% Monthly Senior Notes, Series 2010A, due 2040 15,000 15,000 4.00% - 4.50% York County Industrial Development Authority Exempt Facilities Revenue Bonds, Series 2015, due 2029 - 2045 10,000 10,000 Committed Line of Credit, due 2019 3,507 - Total long-term debt 90,973 87,488 Less discount on issuance of long-term debt (220 ) (226 ) Less unamortized debt issuance costs (2,543 ) (2,609 ) Less current maturities (44 ) (44 ) Long-term portion 88,166 84,609

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	6 Months Ended
	Jun. 30, 2017
Fair Value Measurements [Abstract]
Fair Value of Interest Rate Swap	The Company has recorded its interest rate swap liability at fair value in accordance with the standards. The liability is recorded under the caption "Other deferred credits" on the balance sheet. The table below illustrates the fair value of the interest rate swap as of the end of the reporting period. Description June 30, 2017 Fair Value Measurements at Reporting Date Using Significant Other Observable Inputs (Level 2) Interest Rate Swap $2,263 $2,263 Fair values are measured as the present value of all expected future cash flows based on the LIBOR-based swap yield curve as of the date of the valuation. These inputs to this calculation are deemed to be Level 2 inputs. The balance sheet carrying value reflects the Company's credit quality as of June 30, 2017. The rate used in discounting all prospective cash flows anticipated to be made under this swap reflects a representation of the yield to maturity for 30-year debt on utilities rated A- as of June 30, 2017. The use of the Company's credit rating resulted in a reduction in the fair value of the swap liability of $138 as of June 30, 2017. The fair value of the swap reflecting the Company's credit quality as of December 31, 2016 is shown in the table below. Description December 31, 2016 Fair Value Measurements at Reporting Date Using Significant Other Observable Inputs (Level 2) Interest Rate Swap $2,292 $2,292

Stock Based Compensation (Table

Stock Based Compensation (Tables)	6 Months Ended
	Jun. 30, 2017
Stock-Based Compensation [Abstract]
Restricted Stock	The following tables summarize the stock grant amounts and activity for the six months ended June 30, 2017. Number of Shares Grant Date Weighted Average Fair Value Nonvested at beginning of the period 660 $37.20 Granted 1,505 $38.00 Vested (711) $38.00 Forfeited - - Nonvested at end of the period 1,454 $37.64

Common Stock and Earnings Per26

Common Stock and Earnings Per Share (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Mar. 11, 2013
Common Stock and Earnings Per Share [Abstract]
Net income	$ 2,935	$ 2,847	$ 5,516	$ 5,333
Shares Used in Computing Basic and Diluted Net Income per Share [Abstract]
Weighted average common shares, basic (in shares)	12,839,968	12,849,884	12,844,500	12,835,495
Effect of dilutive securities [Abstract]
Employee stock-based compensation	80	0	81	0
Weighted average common shares, diluted (in shares)	12,840,048	12,849,884	12,844,581	12,835,495
Stock Repurchase Program [Abstract]
Number of shares authorized to be repurchased under the stock repurchase program (in shares)					1,200,000
Number of shares repurchased under the stock repurchase program (in shares)	12,900	0	37,229	0
Number of remaining shares authorized to be repurchased under the stock repurchase program (in shares)	618,004		618,004

Commitments (Details)

Commitments (Details) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2017USD ($)SampleHomePartsPerBillion	Jun. 30, 2017USD ($)gal / moSampleHomePartsPerBillionServiceLine
Company-Owned Lead Service Lines [Member]
Other Commitments [Abstract]
Number of samples that can exceed action level | Sample	5	5
Number of high-risk homes tested for lead | Home	50	50
Action level for lead | PartsPerBillion	15	15
Number of samples that exceeded action level | Sample	6	6
Amount of exceedance | PartsPerBillion	1	1
Percentage of company-owned lead service lines	3.00%	3.00%
Percentage of company-owned lead service lines to be replaced annually	7.00%	7.00%
Monthly credit provided to affected customers to flush line | gal / mo		200
Water testing expenses and flushing credits incurred	$ 4	$ 11
Term for water testing expense and flushing credits		3 years 6 months
Term to replace all remaining company-owned lead service lines		3 years 6 months
Costs incurred to replace company-owned lead service lines		$ 1,030
Costs to be incurred to replace company-owned lead service lines	1,600	$ 1,600
Term to integrate service line replacement costs into annual capital budgets		3 years 6 months
Customer-Owned Lead Service Lines [Member]
Other Commitments [Abstract]
Term to replace all remaining customer-owned lead service lines		3 years 6 months
Term of tariff modification to replace customer-owned lead service lines connected to company-owned lead service lines		4 years
Number of lead customer-owned service lines to be replaced annually | ServiceLine		400
Term of tariff modification to replace customer-owned lead service lines regardless of material used for company-owned service lines		9 years
Costs incurred to replace customer-owned lead service lines connected to company-owned lead service lines		$ 93
Costs to be incurred to replace customer-owned lead service lines connected to company-owned lead service lines	130	130
Costs to be incurred to replace customer-owned lead service lines regardless of material used for company-owned lead service lines	1,040	$ 1,040
Customer-Owned Lead Service Lines [Member] | Minimum [Member]
Other Commitments [Abstract]
Remaining recovery period		4 years
Customer-Owned Lead Service Lines [Member] | Maximum [Member]
Other Commitments [Abstract]
Remaining recovery period		6 years
Commitment for Additional Raw Water Pumping Station and Force Main [Member]
Capital Commitments [Abstract]
Total capital commitments	11,598	$ 11,598
Remaining capital commitments to be incurred	$ 3,490	$ 3,490

Pensions (Details)

Pensions (Details) - Pension Plans [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Components of Net Periodic Benefit Cost [Abstract]
Service cost	$ 270	$ 255	$ 540	$ 509
Interest cost	398	400	796	800
Expected return on plan assets	(598)	(559)	(1,197)	(1,117)
Amortization of actuarial loss	123	140	246	280
Amortization of prior service credit	(3)	(3)	(6)	(6)
Rate-regulated adjustment	385	342	771	684
Net periodic pension expense	$ 575	$ 575	1,150	$ 1,150
Employer Contributions [Abstract]
Estimated employer contributions in 2017					$ 2,300
Contributions made by employer			1,150
Estimated future contributions in current year			$ 1,150

Debt (Details)

Debt (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Dec. 31, 2016
Debt [Abstract]
Total long-term debt	$ 90,973	$ 87,488
Less discount on issuance of long-term debt	(220)	(226)
Less unamortized debt issuance costs	(2,543)	(2,609)
Less current maturities	(44)	(44)
Long-term portion	88,166	84,609
10.17% Senior Notes, Series A, due 2019 [Member]
Debt [Abstract]
Total long-term debt	$ 6,000	6,000
Interest rate	10.17%
9.60% Senior Notes, Series B, due 2019 [Member]
Debt [Abstract]
Total long-term debt	$ 5,000	5,000
Interest rate	9.60%
1.00% Pennvest Note, due 2019 [Member]
Debt [Abstract]
Total long-term debt	$ 96	118
Interest rate	1.00%
10.05% Senior Notes, Series C, due 2020 [Member]
Debt [Abstract]
Total long-term debt	$ 6,500	6,500
Interest rate	10.05%
8.43% Senior Notes, Series D, due 2022 [Member]
Debt [Abstract]
Total long-term debt	$ 7,500	7,500
Interest rate	8.43%
Variable Rate Pennsylvania Economic Development Financing Authority Exempt Facilities Revenue Refunding Bonds, Series 2008A, due 2029 [Member]
Debt [Abstract]
Total long-term debt	$ 12,000	12,000
4.75% York County Industrial Development Authority Revenue Bonds, series 2006, due 2036 [Member]
Debt [Abstract]
Total long-term debt	$ 10,500	10,500
Interest rate	4.75%
4.50% Pennsylvania Economic Development Financing Authority Exempt Facilities Revenue Refunding Bonds, Series 2014, due 2038 [Member]
Debt [Abstract]
Total long-term debt	$ 14,870	14,870
Interest rate	4.50%
5.00% Monthly Senior Notes, Series 2010A, due 2040 [Member]
Debt [Abstract]
Total long-term debt	$ 15,000	15,000
Interest rate	5.00%
4.00% - 4.50% York County Industrial Development Authority Exempt Facilities Revenue Bonds, Series 2015, due 2029 - 2045 [Member]
Debt [Abstract]
Total long-term debt	$ 10,000	10,000
4.00% - 4.50% York County Industrial Development Authority Exempt Facilities Revenue Bonds, Series 2015, due 2029 - 2045 [Member] | Maximum [Member]
Debt [Abstract]
Interest rate	4.50%
4.00% - 4.50% York County Industrial Development Authority Exempt Facilities Revenue Bonds, Series 2015, due 2029 - 2045 [Member] | Minimum [Member]
Debt [Abstract]
Interest rate	4.00%
Committed Line of Credit, due 2019 [Member]
Debt [Abstract]
Total long-term debt	$ 3,507	$ 0
First Line of Credit [Member]
Debt [Abstract]
Renewed line of credit	$ 13,000
Maturity date	May 31, 2019
Second Line of Credit [Member]
Debt [Abstract]
Renewed line of credit	$ 11,000
Maturity date	May 31, 2019
Third Line of Credit [Member]
Debt [Abstract]
Renewed line of credit	$ 7,500
Maturity date	Jun. 30, 2018

Interest Rate Swap Agreement (D

Interest Rate Swap Agreement (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Interest Rate Swap Agreement [Abstract]
Long-term debt	$ 90,973		$ 90,973		$ 87,488
Variable Rate Pennsylvania Economic Development Financing Authority Exempt Facilities Revenue Refunding Bonds, Series 2008A, due 2029 [Member]
Interest Rate Swap Agreement [Abstract]
Long-term debt	12,000		12,000		$ 12,000
Variable Rate Pennsylvania Economic Development Financing Authority Exempt Facilities Revenue Refunding Bonds, Series 2008A, due 2029 [Member] | Interest Rate Swap [Member]
Interest Rate Swap Agreement [Abstract]
Notional amount of swap	$ 12,000		$ 12,000
Fixed interest rate	3.16%		3.16%
Net payment rate on swap	2.53%	2.88%	2.59%	2.84%
Interest rate swap settlements reclassified from regulatory assets to interest expense	$ 76	$ 86	$ 155	$ 173
Interest rate swap loss capitalized	(120)	$ (334)	(129)	$ (843)
Interest rate swap settlements to be reclassified during the next 12 months	281		281
Potential payment to counterparty	$ 2,401		$ 2,401
Variable Rate Pennsylvania Economic Development Financing Authority Exempt Facilities Revenue Refunding Bonds, Series 2008A, due 2029 [Member] | LIBOR [Member] | Interest Rate Swap [Member]
Interest Rate Swap Agreement [Abstract]
Percentage of variable interest rate	59.00%		59.00%
Term of variable rate			1 month

Fair Value Measurements (Detail

Fair Value Measurements (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Dec. 31, 2016
Interest Rate Swap [Abstract]
Term of debt on utilities rated A- used to discount prospective cash flows	30 years
Reduction in fair value of swap liability	$ 138
Fair Value on a Recurring Basis [Member]
Interest Rate Swap [Abstract]
Interest rate swap	2,263	$ 2,292
Fair Value on a Recurring Basis [Member] | Fair Value Measurements Using Significant Other Observable Inputs (Level 2) [Member]
Interest Rate Swap [Abstract]
Interest rate swap	2,263	2,292
Carrying Amount [Member]
Fair Value, Financial Liabilities [Abstract]
Total long-term debt	90,973	87,488
Estimate of Fair Value [Member]
Fair Value, Financial Liabilities [Abstract]
Total long-term debt	103,000	99,000
Carrying Amount (Fair Value Not Accurately Estimated) [Member]
Liabilities [Abstract]
Customer advances for construction	7,483	7,102
Assets [Abstract]
Notes receivable	$ 255	$ 255

Income Taxes (Details)

Income Taxes (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Income Taxes [Abstract]
Effective tax rate	31.80%	34.20%	29.70%	34.40%

Acquisitions (Details)

Acquisitions (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2017USD ($)CustomerUnit	Jun. 30, 2016USD ($)	Dec. 31, 2016USD ($)
Acquisitions [Abstract]
Purchase price	$ 472	$ 29
Acquisition adjustment	$ (3,263)		$ (3,667)
Water Assets of Stockham's Village Mobile Home Park [Member]
Acquisitions [Abstract]
Number of customers acquired | Customer	80
Purchase price	$ 24
Acquisition adjustment	$ 17
Wastewater Facilities of West York Borough [Member]
Acquisitions [Abstract]
Number of customers acquired | Customer	1,700
Number of units acquired | Unit	2,200
Purchase price	$ 448
Acquisition adjustment	$ 358

Stock-Based Compensation (Detai

Stock-Based Compensation (Details) - LTIP [Member] - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2017	May 02, 2016
Stock-Based Compensation [Abstract]
Maximum number of shares of common stock that can be issued under the plan (in shares)			100,000
Term of plan		10 years
Maximum number of shares of common stock subject to awards that may be granted to a participant per calendar year (in shares)		2,000
Restricted Stock [Member]
Number of Shares [Roll Forward]
Nonvested at beginning of the period (in shares)		660
Granted (in shares)		1,505
Vested (in shares)		(711)
Forfeited (in shares)		0
Nonvested at end of the period (in shares)	1,454	1,454
Grant Date Weighted Average Fair Value [Abstract]
Nonvested at beginning of the period (in dollars per share)		$ 37.20
Granted (in dollars per share)		38
Vested (in dollars per share)		38
Forfeited (in dollars per share)		0
Nonvested at end of the period (in dollars per share)	$ 37.64	$ 37.64
Stock-Based Compensation Expense [Abstract]
Stock-based compensation expense	$ 32	$ 34
Recognized tax benefits related to stock-based compensation expense	13	14
Fair value of vested shares		27
Stock-based compensation expense not yet recognized	$ 47	$ 47
Period of recognition		3 years
Restricted Stock [Member] | Officers and Key Employees [Member]
Stock-Based Compensation [Abstract]
Vesting period		3 years

Rate Matters (Details)

Rate Matters (Details) - DSIC [Member] - PPUC [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Rate Matters [Abstract]
Distribution system improvement charge revenue	$ 62	$ 0	$ 62	$ 0
Maximum [Member]
Rate Matters [Abstract]
Distribution system improvement charge percentage over base rate			5.00%
Minimum [Member]
Rate Matters [Abstract]
Distribution system improvement charge percentage over base rate			0.00%