Middlesex Water (MSEX) 10-K 4 Mar 16 2015 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2015	Feb. 29, 2016	Jun. 30, 2015
Document And Entity Information [Abstract]
Entity Registrant Name	MIDDLESEX WATER CO
Entity Central Index Key	66,004
Document Type	10-K
Document Period End Date	Dec. 31, 2015
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity a Well-known Seasoned Issuer	No
Entity a Voluntary Filer	No
Entity Reporting Status Current	Yes
Entity Filer Category	Accelerated Filer
Entity Public Float			$ 364,603,131
Entity Common Stock, Shares Outstanding		16,229,682
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2,015

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
CONSOLIDATED STATEMENTS OF INCOME [Abstract]
Operating Revenues	$ 126,025	$ 117,139	$ 114,846
Operating Expenses:
Operations and Maintenance	65,167	59,129	60,748
Depreciation	12,051	11,444	10,988
Other Taxes	12,967	12,174	12,140
Total Operating Expenses	90,185	82,747	83,876
Operating Income	35,840	34,392	30,970
Other Income (Expense):
Allowance for Funds Used During Construction	380	317	314
Other Income	208	281	183
Other Expense	(295)	(1,001)	(406)
Total Other Income, net	293	(403)	91
Interest Charges	5,554	5,607	5,807
Income before Income Taxes	30,579	28,382	25,254
Income Taxes	10,551	9,937	8,621
Net Income	20,028	18,445	16,633
Preferred Stock Dividend Requirements	144	151	190
Earnings Applicable to Common Stock	$ 19,884	$ 18,294	$ 16,443
Earnings per share of Common Stock:
Basic	$ 1.23	$ 1.14	$ 1.04
Diluted	$ 1.22	$ 1.13	$ 1.03
Average Number of Common Shares Outstanding :
Basic	16,175	16,052	15,868
Diluted	16,331	16,226	16,110
Cash Dividends Paid per Common Share (in dollars per share)	$ 0.776	$ 0.763	$ 0.753

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
UTILITY PLANT:
Water Production	$ 142,794	$ 138,242
Transmission and Distribution	398,363	378,154
General	61,322	58,851
Construction Work in Progress	5,734	8,145
TOTAL	608,213	583,392
Less Accumulated Depreciation	126,343	117,986
UTILITY PLANT - NET	481,870	465,406
CURRENT ASSETS:
Cash and Cash Equivalents	3,469	2,673
Accounts Receivable, net	10,060	10,012
Unbilled Revenues	6,246	5,937
Materials and Supplies (at average cost)	2,600	2,253
Prepayments	2,035	1,989
TOTAL CURRENT ASSETS	24,410	22,864
DEFERRED CHARGES AND OTHER ASSETS:
Unamortized Debt Expense	3,339	3,474
Preliminary Survey and Investigation Charges	2,199	2,211
Regulatory Assets	58,552	66,216
Operations Contracts, Developer and Other Receivables	2,921	3,313
Restricted Cash	439	2,573
Non-utility Assets - Net	9,199	$ 9,197
Federal Income Tax Receivable	1,408
Other	385	$ 518
TOTAL DEFERRED CHARGES AND OTHER ASSETS	78,442	87,502
TOTAL ASSETS	584,722	575,772
CAPITALIZATION:
Common Stock, No Par Value	150,763	148,668
Retained Earnings	55,931	48,623
TOTAL COMMON EQUITY	206,694	197,291
Preferred Stock	2,436	2,436
Long-term Debt	136,247	136,039
TOTAL CAPITALIZATION	345,377	335,766
CURRENT LIABILITIES:
Current Portion of Long-term Debt	5,739	5,910
Notes Payable	3,000	19,000
Accounts Payable	6,525	6,354
Accrued Taxes	9,126	8,948
Accrued Interest	1,104	1,134
Unearned Revenues and Advanced Service Fees	880	839
Other	1,945	1,687
TOTAL CURRENT LIABILITIES	$ 28,319	$ 43,872
COMMITMENTS AND CONTINGENT LIABILITIES (Note 4)
DEFERRED CREDITS AND OTHER LIABILITIES:
Customer Advances for Construction	$ 20,461	$ 21,978
Accumulated Deferred Investment Tax Credits	832	910
Accumulated Deferred Income Taxes	67,702	47,306
Employee Benefit Plans	36,515	45,135
Regulatory Liability - Cost of Utility Plant Removal	10,876	10,273
Other	1,597	1,277
TOTAL DEFERRED CREDITS AND OTHER LIABILITIES	137,983	126,879
CONTRIBUTIONS IN AID OF CONSTRUCTION	73,043	69,255
TOTAL CAPITALIZATION AND LIABILITIES	$ 584,722	$ 575,772

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	$ 20,028	$ 18,445	$ 16,633
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Depreciation and Amortization	13,087	12,191	11,858
Provision for Deferred Income Taxes and Investment Tax Credits	15,753	3,130	2,915
Equity Portion of Allowance for Funds Used During Construction (AFUDC)	(228)	(207)	(201)
Cash Surrender Value of Life Insurance	(76)	(108)	(226)
Stock Compensation Expense	633	$ 539	$ 493
Adoption of Repairs on Tangible Property Regulations, net	2,680
Changes in Assets and Liabilities:
Accounts Receivable	(48)	$ 1,950	$ 1,201
Unbilled Revenues	(309)	(285)	(169)
Materials & Supplies	(347)	(269)	(581)
Prepayments	(46)	(261)	527
Accounts Payable	171	26	2,520
Accrued Taxes	178	816	(1,134)
Accrued Interest	(30)	(17)	196
Employee Benefit Plans	(129)	(3,243)	(1,140)
Unearned Revenue & Advanced Service Fees	41	2	81
Other Assets and Liabilities	(146)	(138)	832
NET CASH PROVIDED BY OPERATING ACTIVITIES	51,212	32,571	33,805
CASH FLOWS FROM INVESTING ACTIVITIES:
Utility Plant Expenditures, Including AFUDC of $152 in 2015, $110 in 2014 and $113 in 2013	(25,773)	(22,596)	(20,080)
Restricted Cash	$ 1,390	(100)	323
Distribution From/(Investment In) Joint Venture		857	(1,655)
NET CASH USED IN INVESTING ACTIVITIES	$ (24,383)	(21,839)	(21,412)
CASH FLOWS FROM FINANCING ACTIVITIES:
Redemption of Long-term Debt	(6,284)	(5,481)	(11,230)
Proceeds from Issuance of Long-term Debt	7,000	12,246	4,045
Net Short-term Bank Borrowings	(16,000)	(9,450)	500
Deferred Debt Issuance Expense	(65)	$ (141)	$ (57)
Common Stock Issuance Expense	(22)
Restricted Cash	744		$ 6,070
Proceeds from Issuance of Common Stock	1,462	$ 1,493	1,368
Payment of Common Dividends	(12,553)	(12,231)	(11,943)
Payment of Preferred Dividends	(144)	(151)	(190)
Construction Advances and Contributions-Net	(171)	822	853
NET CASH USED IN FINANCING ACTIVITIES	(26,033)	(12,893)	(10,584)
NET CHANGES IN CASH AND CASH EQUIVALENTS	796	(2,161)	1,809
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	2,673	4,834	3,025
CASH AND CASH EQUIVALENTS AT END OF PERIOD	3,469	2,673	4,834
SUPPLEMENTAL DISCLOSURE OF NON-CASH ACTIVITY:
Utility Plant received as Construction Advances and Contributions	2,441	$ 6,598	3,176
Long-term Debt Deobligation	466		64
Cash Paid During the Year for:
Interest	5,702	$ 5,745	5,743
Interest Capitalized	152	110	113
Income Taxes	$ 1,391	$ 5,903	$ 7,009

CONSOLIDATED STATEMENTS OF CAS5

CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
CONSOLIDATED STATEMENTS OF CASH FLOWS [Abstract]
Allowance for funds used during construction	$ 152	$ 110	$ 113

CONSOLIDATED STATEMENTS OF CAPI

CONSOLIDATED STATEMENTS OF CAPITAL STOCK AND LONG-TERM DEBT - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Common Stock, No Par Value	$ 150,763	$ 148,668
Retained Earnings	55,931	48,623
TOTAL COMMON EQUITY	206,694	197,291
TOTAL PREFERRED STOCK	2,436	2,436
SUBTOTAL LONG-TERM DEBT	140,279	140,029
Add: Premium on Issuance of Long-term Debt	1,707	1,920
Less: Current Portion of Long-term Debt	(5,739)	(5,910)
TOTAL LONG-TERM DEBT	136,247	136,039
Amortizing Secured Note, due December 20, 2021 [Member]
SUBTOTAL LONG-TERM DEBT	1,629	1,825
Amortizing Secured Note, due May 19, 2028 [Member]
SUBTOTAL LONG-TERM DEBT	5,215	5,635
Amortizing Secured Note, due August 25, 2030 [Member]
SUBTOTAL LONG-TERM DEBT	4,107	4,387
Amortizing Secured Note, due September 19, 2031 [Member]
SUBTOTAL LONG-TERM DEBT	4,387	4,667
State Revolving Trust Note, due December 31, 2022 [Member]
SUBTOTAL LONG-TERM DEBT	376	421
State Revolving Trust Note, due May 1, 2025 [Member]
SUBTOTAL LONG-TERM DEBT	2,267	2,463
State Revolving Trust Note, due March 1, 2026 [Member]
SUBTOTAL LONG-TERM DEBT	469	506
State Revolving Trust Note, due January 25, 2027 [Member]
SUBTOTAL LONG-TERM DEBT	501	536
State Revolving Trust Note, due December 1, 2026 [Member]
SUBTOTAL LONG-TERM DEBT	651	697
State Revolving Trust Bond 4.00% to 5.00%, due August 1, 2021 [Member]
SUBTOTAL LONG-TERM DEBT	254	299
State Revolving Trust Bond 0.00%, due August 1, 2021 [Member]
SUBTOTAL LONG-TERM DEBT	203	241
State Revolving Trust Note, due July 1, 2028 [Member]
SUBTOTAL LONG-TERM DEBT	294	313
State Revolving Trust Note, due January 1, 2028 [Member]
SUBTOTAL LONG-TERM DEBT	97	104
State Revolving Trust Note, due August 1, 2031 [Member]
SUBTOTAL LONG-TERM DEBT	1,066	1,115
Amortizing Secured Note, due April 20, 2029 [Member]
SUBTOTAL LONG-TERM DEBT	4,651	4,999
Amortizing Secured Note 7.05%, due January 20, 2030 [Member]
SUBTOTAL LONG-TERM DEBT	3,521	3,771
Amortizing Secured Note 5.69%, due January 20, 2030 [Member]
SUBTOTAL LONG-TERM DEBT	7,222	7,735
Amortizing Secured Note, due April 20, 2040 [Member]
SUBTOTAL LONG-TERM DEBT	14,707	8,000
State Revolving Trust Note, due July 1, 2031 [Member]
SUBTOTAL LONG-TERM DEBT	2,303	2,411
State Revolving Trust Note, due November 30, 2030 [Member]
SUBTOTAL LONG-TERM DEBT	1,216	1,276
First Mortgage Bonds - Series X [Member]
SUBTOTAL LONG-TERM DEBT	162	215
First Mortgage Bonds - Series Y [Member]
SUBTOTAL LONG-TERM DEBT	185	245
First Mortgage Bonds - Series Z [Member]
SUBTOTAL LONG-TERM DEBT	446	559
First Mortgage Bonds - Series AA [Member]
SUBTOTAL LONG-TERM DEBT	565	700
First Mortgage Bonds - Series BB [Member]
SUBTOTAL LONG-TERM DEBT	723	845
First Mortgage Bonds - Series CC [Member]
SUBTOTAL LONG-TERM DEBT	895	1,025
First Mortgage Bonds - Series EE [Member]
SUBTOTAL LONG-TERM DEBT	3,132	3,550
First Mortgage Bonds - Series FF [Member]
SUBTOTAL LONG-TERM DEBT	3,690	4,900
First Mortgage Bonds - Series GG [Member]
SUBTOTAL LONG-TERM DEBT	993	1,083
First Mortgage Bonds - Series HH [Member]
SUBTOTAL LONG-TERM DEBT	1,300	1,390
First Mortgage Bonds - Series II [Member]
SUBTOTAL LONG-TERM DEBT	789	881
First Mortgage Bonds - Series JJ [Member]
SUBTOTAL LONG-TERM DEBT	1,010	1,090
First Mortgage Bonds - Series KK [Member]
SUBTOTAL LONG-TERM DEBT	1,167	1,255
First Mortgage Bonds - Series LL [Member]
SUBTOTAL LONG-TERM DEBT	1,365	1,435
First Mortgage Bonds - Series MM [Member]
SUBTOTAL LONG-TERM DEBT	1,437	1,537
First Mortgage Bonds - Series NN [Member]
SUBTOTAL LONG-TERM DEBT	1,675	1,755
First Mortgage Bonds - Series OO [Member]
SUBTOTAL LONG-TERM DEBT	2,408	2,559
First Mortgage Bonds - Series PP [Member]
SUBTOTAL LONG-TERM DEBT	815	850
First Mortgage Bonds - Series QQ [Member]
SUBTOTAL LONG-TERM DEBT	9,915	9,915
First Mortgage Bonds - Series RR [Member]
SUBTOTAL LONG-TERM DEBT	22,500	22,500
First Mortgage Bonds - Series SS [Member]
SUBTOTAL LONG-TERM DEBT	23,000	23,000
First Mortgage Bonds - Series TT [Member]
SUBTOTAL LONG-TERM DEBT	2,559	2,709
First Mortgage Bonds - Series UU [Member]
SUBTOTAL LONG-TERM DEBT	935	975
First Mortgage Bonds - Series VV [Member]
SUBTOTAL LONG-TERM DEBT	2,577	2,720
First Mortgage Bonds - Series WW [Member]
SUBTOTAL LONG-TERM DEBT	900	935
Convertible Preferred Stock $7.00 Series
TOTAL PREFERRED STOCK	1,007	1,007
Convertible Preferred Stock $8.00 Series [Member]
TOTAL PREFERRED STOCK	349	349
Nonredeemable Preferred Stock $7.00 Series
TOTAL PREFERRED STOCK	80	80
Nonredeemable Preferred Stock $4.75 Series [Member]
TOTAL PREFERRED STOCK	$ 1,000	$ 1,000

CONSOLIDATED STATEMENTS OF CAP7

CONSOLIDATED STATEMENTS OF CAPITAL STOCK AND LONG-TERM DEBT (Parenthetical) - shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Common Stock, Shares Authorized	40,000,000	40,000,000
Common Stock, Shares Outstanding	16,225,000	16,124,000
Preferred Stock, Shares Authorized	126,000	126,000
Preferred Stock, Shares Outstanding	24,000	24,000
Amortizing Secured Note, due December 20, 2021 [Member]
Due date of debt	Dec. 20, 2021
Interest rate	8.05%
Amortizing Secured Note, due May 19, 2028 [Member]
Due date of debt	May 19, 2028
Interest rate	6.25%
Amortizing Secured Note, due August 25, 2030 [Member]
Due date of debt	Aug. 25, 2030
Interest rate	6.44%
Amortizing Secured Note, due September 19, 2031 [Member]
Due date of debt	Sep. 19, 2031
Interest rate	6.46%
State Revolving Trust Note, due December 31, 2022 [Member]
Due date of debt	Dec. 31, 2022
Interest rate	4.22%
State Revolving Trust Note, due May 1, 2025 [Member]
Due date of debt	May 1, 2025
Interest rate	3.60%
State Revolving Trust Note, due March 1, 2026 [Member]
Due date of debt	Mar. 1, 2026
Interest rate	3.30%
State Revolving Trust Note, due January 25, 2027 [Member]
Due date of debt	Jan. 25, 2027
Interest rate	3.49%
State Revolving Trust Note, due December 1, 2026 [Member]
Due date of debt	Dec. 1, 2026
Interest rate	4.03%
State Revolving Trust Bond 4.00% to 5.00%, due August 1, 2021 [Member]
Due date of debt	Aug. 1, 2021
Interest rate - minimum	4.00%
Interest rate - maximum	5.00%
State Revolving Trust Bond 0.00%, due August 1, 2021 [Member]
Due date of debt	Aug. 1, 2021
Interest rate	0.00%
State Revolving Trust Note, due July 1, 2028 [Member]
Due date of debt	Jul. 1, 2028
Interest rate	3.64%
State Revolving Trust Note, due January 1, 2028 [Member]
Due date of debt	Jan. 1, 2028
Interest rate	3.64%
State Revolving Trust Note, due August 1, 2031 [Member]
Due date of debt	Aug. 1, 2031
Interest rate	3.45%
Amortizing Secured Note, due April 20, 2029 [Member]
Due date of debt	Apr. 20, 2029
Interest rate	6.59%
Amortizing Secured Note 7.05%, due January 20, 2030 [Member]
Due date of debt	Jan. 20, 2030
Interest rate	7.05%
Amortizing Secured Note 5.69%, due January 20, 2030 [Member]
Due date of debt	Jan. 20, 2030
Interest rate	5.69%
Amortizing Secured Note, due April 20, 2040 [Member]
Due date of debt	Apr. 20, 2040
Interest rate	4.45%
State Revolving Trust Note, due July 1, 2031 [Member]
Due date of debt	Jul. 1, 2031
Interest rate	3.75%
State Revolving Trust Note, due November 30, 2030 [Member]
Due date of debt	Nov. 30, 2030
Interest rate	3.75%
First Mortgage Bonds - Series X [Member]
Due date of debt	Sep. 1, 2018
Interest rate	0.00%
First Mortgage Bonds - Series Y [Member]
Due date of debt	Sep. 1, 2018
Interest rate - minimum	4.25%
Interest rate - maximum	4.63%
First Mortgage Bonds - Series Z [Member]
Due date of debt	Sep. 1, 2019
Interest rate	0.00%
First Mortgage Bonds - Series AA [Member]
Due date of debt	Sep. 1, 2019
Interest rate - minimum	5.25%
Interest rate - maximum	5.75%
First Mortgage Bonds - Series BB [Member]
Due date of debt	Sep. 1, 2021
Interest rate	0.00%
First Mortgage Bonds - Series CC [Member]
Due date of debt	Sep. 1, 2021
Interest rate - minimum	4.00%
Interest rate - maximum	5.00%
First Mortgage Bonds - Series EE [Member]
Due date of debt	Aug. 1, 2023
Interest rate	0.00%
First Mortgage Bonds - Series FF [Member]
Due date of debt	Aug. 1, 2024
Interest rate - minimum	3.00%
Interest rate - maximum	5.50%
First Mortgage Bonds - Series GG [Member]
Due date of debt	Aug. 1, 2026
Interest rate	0.00%
First Mortgage Bonds - Series HH [Member]
Due date of debt	Aug. 1, 2026
Interest rate - minimum	4.00%
Interest rate - maximum	5.00%
First Mortgage Bonds - Series II [Member]
Due date of debt	Aug. 1, 2024
Interest rate	0.00%
First Mortgage Bonds - Series JJ [Member]
Due date of debt	Aug. 1, 2027
Interest rate - minimum	3.40%
Interest rate - maximum	5.00%
First Mortgage Bonds - Series KK [Member]
Due date of debt	Aug. 1, 2028
Interest rate	0.00%
First Mortgage Bonds - Series LL [Member]
Due date of debt	Aug. 1, 2028
Interest rate - minimum	5.00%
Interest rate - maximum	5.50%
First Mortgage Bonds - Series MM [Member]
Due date of debt	Aug. 1, 2030
Interest rate	0.00%
First Mortgage Bonds - Series NN [Member]
Due date of debt	Aug. 1, 2030
Interest rate - minimum	3.00%
Interest rate - maximum	4.375%
First Mortgage Bonds - Series OO [Member]
Due date of debt	Aug. 1, 2031
Interest rate	0.00%
First Mortgage Bonds - Series PP [Member]
Due date of debt	Aug. 1, 2031
Interest rate - minimum	2.00%
Interest rate - maximum	5.00%
First Mortgage Bonds - Series QQ [Member]
Due date of debt	Oct. 1, 2023
Interest rate	5.00%
First Mortgage Bonds - Series RR [Member]
Due date of debt	Oct. 1, 2038
Interest rate	3.80%
First Mortgage Bonds - Series SS [Member]
Due date of debt	Oct. 1, 2047
Interest rate	4.25%
First Mortgage Bonds - Series TT [Member]
Due date of debt	Aug. 1, 2032
Interest rate	0.00%
First Mortgage Bonds - Series UU [Member]
Due date of debt	Aug. 1, 2032
Interest rate - minimum	3.00%
Interest rate - maximum	3.25%
First Mortgage Bonds - Series VV [Member]
Due date of debt	Aug. 1, 2033
Interest rate	0.00%
First Mortgage Bonds - Series WW [Member]
Due date of debt	Aug. 1, 2033
Interest rate - minimum	3.00%
Interest rate - maximum	5.00%
Convertible Preferred Stock $7.00 Series
Preferred Stock, Shares Outstanding	10,000	10,000
Convertible Preferred Stock $8.00 Series [Member]
Preferred Stock, Shares Outstanding	3,000	3,000
Nonredeemable Preferred Stock $7.00 Series
Preferred Stock, Shares Outstanding	1,000	1,000
Nonredeemable Preferred Stock $4.75 Series [Member]
Preferred Stock, Shares Outstanding	10,000	10,000

CONSOLIDATED STATEMENTS OF COMM

CONSOLIDATED STATEMENTS OF COMMON STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock [Member]	Retained Earnings [Member]	Total
Balance at Dec. 31, 2012	$ 143,572	$ 38,060	$ 181,632
Balance, shares at Dec. 31, 2012	15,795
Net Income		16,633	16,633
Dividend Reinvestment & Common Stock Purchase Plan	$ 1,653		1,653
Dividend Reinvestment & Common Stock Purchase Plan, shares	82
Restricted Stock Award, Net - Employees	$ 388		388
Restricted Stock Award, Net - Employees, shares	26
Stock Award - Board Of Directors	$ 105		105
Stock Award - Board Of Directors, shares	5
Conversion of Convertible Preferred Stock	$ 467		467
Conversion of Convertible Preferred Stock, shares	55
Cash Dividends on Common Stock		(11,943)	(11,943)
Cash Dividends on Preferred Stock		(190)	(190)
Balance at Dec. 31, 2013	$ 146,185	42,560	188,745
Balance, shares at Dec. 31, 2013	15,963
Net Income		18,445	18,445
Dividend Reinvestment & Common Stock Purchase Plan	$ 1,493		1,493
Dividend Reinvestment & Common Stock Purchase Plan, shares	71
Restricted Stock Award, Net - Employees	$ 434		434
Restricted Stock Award, Net - Employees, shares	33
Stock Award - Board Of Directors	$ 105		105
Stock Award - Board Of Directors, shares	5
Conversion of Convertible Preferred Stock	$ 451		451
Conversion of Convertible Preferred Stock, shares	52
Cash Dividends on Common Stock		(12,231)	(12,231)
Cash Dividends on Preferred Stock		(151)	(151)
Balance at Dec. 31, 2014	$ 148,668	48,623	197,291
Balance, shares at Dec. 31, 2014	16,124
Net Income		20,028	20,028
Dividend Reinvestment & Common Stock Purchase Plan	$ 1,462		1,462
Dividend Reinvestment & Common Stock Purchase Plan, shares	63
Restricted Stock Award, Net - Employees	$ 528		528
Restricted Stock Award, Net - Employees, shares	33
Stock Award - Board Of Directors	$ 105		105
Stock Award - Board Of Directors, shares	5
Cash Dividends on Common Stock		(12,554)	(12,554)
Cash Dividends on Preferred Stock		(144)	(144)
Common Stock Expenses		(22)	(22)
Balance at Dec. 31, 2015	$ 150,763	$ 55,931	$ 206,694
Balance, shares at Dec. 31, 2015	16,225

CONSOLIDATED STATEMENTS OF COM9

CONSOLIDATED STATEMENTS OF COMMON STOCKHOLDERS' EQUITY (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
CONSOLIDATED STATEMENTS OF COMMON STOCKHOLDERS' EQUITY [Abstract]
Conversion of Convertible Preferred Stock Value Per Share	$ 7	$ 8

Organization, Summary of Signif

Organization, Summary of Significant Accounting Policies and Recent Developments	12 Months Ended
	Dec. 31, 2015
Organization Summary Of Significant Accounting Policies And Recent Developments [Abstract]
Organization, Summary of Significant Accounting Policies and Recent Developments	Note 1 – Organization, Summary of Significant Accounting Policies and Recent Developments (a) Organization Middlesex Water Company has operated as a water utility in New Jersey since 1897, in Delaware, through our wholly-owned subsidiary, Tidewater, since 1992 and in Pennsylvania, through our wholly-owned subsidiary, Twin Lakes, since 2009. We are in the business of collecting, treating, distributing and selling water for domestic, commercial, municipal, industrial and fire protection purposes. We also operate New Jersey municipal water, wastewater and storm water systems under contract and provide unregulated water and wastewater services in New Jersey and Delaware through our subsidiaries. We also have an investment in a joint venture, Ridgewood Green RME, LLC, that owns and operates facilities which optimize the production of electricity at the Village of Ridgewood, New Jersey wastewater treatment plant and other municipal facilities. Our rates charged to customers for water and wastewater services, the quality of services we provide and certain other matters are regulated in New Jersey, Delaware and Pennsylvania by the New Jersey Board of Public Utilities (NJBPU), Delaware Public Service Commission (DEPSC) and Pennsylvania Public Utilities Commission (PAPUC), respectively. Our USA, USA-PA and White Marsh subsidiaries are not regulated utilities. (b) Principles of Consolidation – The financial statements for Middlesex and its wholly-owned subsidiaries (the Company) are reported on a consolidated basis. All significant intercompany accounts and transactions have been eliminated. Other financial investments in which the Company holds a 50 % or less voting interest and cannot exercise control over the operation and policies of the investments are accounted for under the equity method of accounting. Under the equity method of accounting, the Company records its investment interests in Non Utility Assets and its percentage share of the earnings or losses of the investees in Other Income (Expense). (c) System of Accounts – Middlesex, Pinelands Water and Pinelands Wastewater maintain their accounts in accordance with the Uniform System of Accounts prescribed by the NJBPU. Tidewater, TESI and Southern Shores maintain their accounts in accordance with DEPSC requirements. Twin Lakes maintains its accounts in accordance with PAPUC requirements. (d) Regulatory Accounting 88 99 Accounting Standards Codification (ASC) Regulated Operations In accordance with ASC 980, Regulated Operations no (e) Retirement Benefit Plans The Company's costs for providing retirement benefits are dependent upon numerous factors, including actual plan experience and assumptions of future experience. Retirement benefit plan obligations and expense are determined based on investment performance, discount rates and various other demographic factors related to the population participating in the Company's retirement benefit plans, all of which can change significantly in future years. For more information on the Company's Retirement Benefit Plans, see Note 7 (f) Utility Plant – Utility Plant is stated at original cost as defined for regulatory purposes. Property accounts are charged with the cost of betterments and major replacements of property. Cost includes direct material, labor and indirect charges for pension benefits and payroll taxes. The cost of labor, materials, supervision and other expenses incurred in making repairs and minor replacements and in maintaining the properties is charged to the appropriate expense accounts. At December 31, 2015, there was no event or change in circumstance that would indicate that the carrying amount of any long-lived asset was not recoverable. (g) Depreciation – These rates have been approved by the NJBPU, DEPSC or PAPUC: Source of Supply 1.15 3.44 Transmission and Distribution (T&D): Pumping 2.87 5.39 T&D – Mains 1.10 3.13 Water Treatment 1.65 7.09 T&D – Services 2.12 3.16 General Plant 2.08 17.84 T&D – Other 1.61 4.63 Non-regulated fixed assets consist primarily of office buildings, furniture and fixtures, and transportation equipment. These assets are recorded at original cost and depreciation is calculated based on the estimated useful lives, ranging from 3 40 (h) Preliminary Survey and Investigation (PS&I) Costs – In the design of water and wastewater systems that the Company ultimately intends to construct, own and operate certain expenditures are incurred to advance those project activities. These PS&I costs are recorded as deferred charges on the balance sheet because these costs are expected to be recovered through future rates charged to customers as the underlying projects are placed into service as utility plant. If it is subsequently determined that costs for a project recorded as PS&I are not recoverable through rates charged to our customers, the applicable PS&I costs are recorded as Other Expense on the statement of income at that time. (i) Customers' Advances for Construction (CAC) – plant and/or cash advances are provided to the Company by customers, real estate developers and builders in order to extend utility service to their properties. These transactions are recorded as CAC. Contractual Refunds of CACs in the form of cash are made by the Company and are based on either additional operating revenues generated from new customers or as new customers are connected to the respective system. After all refunds are made and/or contract terms have expired, any remaining balance is transferred to Contributions in Aid of Construction. Contributions in Aid of Construction (CIAC) CAC and CIAC are not depreciated in accordance with regulatory requirements. In addition, these amounts reduce the investment base for purposes of setting rates. (j) Allowance for Funds Used During Construction (AFUDC) The AFUDC rates for the years ended December 31, 2015, 2014 and 2013 for Middlesex and Tidewater are as follows: 2015 2014 2013 Middlesex 6.72 7.03 7.34 Tidewater 7.92 7.91 7.91 (k) Accounts Receivable – We record bad debt expense based on historical write-offs combined with an evaluation of current conditions. The allowance for doubtful accounts was $ 0.8 million and $ 0.7 million as of December 31, 2015 and 2014 , respectively. For the years ended December 31, 2015, 2014 and 2013 , bad debt expense was $ 0.8 million, $ 0.7 0.7 For the years ended December 31, 2015, 2014 and 2013, write-offs were $ 0.6 0.6 0.9 Receivables not expected to be received in 2016 are included as non-current assets in Operations Contracts, Developer and Other Receivables. (l) Revenues Retail customer invoices for regulated utility service are typically comprised of two components; a fixed service charge and a volumetric or consumption charge. Revenues from retail customers, except Tidewater fixed service charges, include amounts billed in arrears on a cycle basis and unbilled amounts estimated from the last meter reading date to the end of the accounting period. The estimated unbilled amounts are determined by utilizing factors which include historical volumetric or consumption usage and current climate and economic conditions. Actual billings may differ from our estimates. Tidewater customers are billed in advance for their fixed service charge and these revenues are recognized as the service is provided to the customer. Southern Shores is an unmetered system. Customers are billed a fixed service charge in advance at the beginning of each month and revenues are recognized as earned. Customers in portions of the TESI system are billed a fixed service charge in arrears. Revenues from the City of Perth Amboy management contract are comprised of fixed and variable fees. Fixed fees, which have been set for the life of the contract, are billed monthly and recorded as earned. Variable fees, which are not significant, are recorded upon approval of the amount by the City of Perth Amboy. Revenues from USA's operations and maintenance contract for the Borough of Avalon, New Jersey (Avalon) water utility, sewer utility and storm water system are fixed for the life of the contract, are billed monthly and recorded as earned. USA also provides services to Avalon in addition to the base services provided under the operation and maintenance contract. These additional services are recorded as earned and billed upon approval of Avalon. (m) Deferred Charges and Other Assets - Unamortized Debt Expense is amortized over the lives of the related issues. Restricted Cash represents proceeds from loans entered into through state financing programs and is held in trusts. The proceeds are restricted for specific capital expenditures and debt service requirements. (n) Income Taxes - Middlesex files a consolidated federal income tax return for the Company and income taxes are allocated based on the separate return method. Investment tax credits have been deferred and are amortized over the estimated useful life of the related property. For more information on income taxes, see Note 3 – Income Taxes (o) Statements of Cash Flows - For purposes of reporting cash flows, the Company considers all highly liquid investments with original maturity dates of three months or less to be cash equivalents. Cash and cash equivalents represent bank balances and money market funds with investments maturing in less than 90 days. (p) Use of Estimates - Conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts in the financial statements. Actual results could differ from those estimates. (q) Recent Accounting Pronouncements Revenue Recognition - Consolidation Debt Issuance Costs Inventory Deferred Income Taxes Recognition and Measurement of Financial Assets and Financial Liabilities (r) Recent Developments Middlesex Base Water Rate Increase 5.0 Note 2 – Rate and Regulatory Matters Pinelands and Twin Lakes Rate Increase Requests 0.3 0.2 0.2 Note 2 – Rate and Regulatory Matters

Rate and Regulatory Matters

Rate and Regulatory Matters	12 Months Ended
	Dec. 31, 2015
Rate and Regulatory Matters [Abstract]
Rate and Regulatory Matters	Note 2 - Rate and Regulatory Matters Rate Matters Middlesex - 5.0 9.5 219.0 9.75 0.1 4.2 10.6 8.1 208.6 9.75 . Tidewater 0.8 3.9 2.5 6.5 0.4 0.2 50 TESI - 0.4 600 0.2 In October 2014, TESI implemented a 33.5 Plantations base wastewater rate increase (approximately $ 0.1 Pinelands - 0.3 0.2 0.2 0.3 50 one Southern Shores - 0.1 Twin Lakes - 0.2 Regulatory Matters We have recorded certain costs as regulatory assets because we expect full recovery of, or are currently recovering, these costs in the rates we charge customers. These deferred costs have been excluded from rate base and, therefore, we are not earning a return on the unamortized balances. These items are detailed as follows: (Thousands of Dollars) December 31, Remaining Regulatory Assets 2015 2014 Recovery Periods Retirement Benefits $ 39,378 $ 47,868 Various Income Taxes 15,541 17,195 Various Rate Cases, Tank Painting, and Other 3,633 1,153 2 9 years Total $ 58,552 $ 66,216 Retirement benefits include pension and other retirement benefits that have been recorded on the Consolidated Balance Sheet in accordance with the guidance provided in ASC 715 , Compensation – Retirement Benefits. The recovery period for income taxes is dependent upon when the temporary differences between the tax and book treatment of various items reverse. The Company uses composite depreciation rates for its regulated utility assets, which is currently an acceptable method under generally accepted accounting principles and is widely used in the utility industry. Historically, under the composite depreciation method, the anticipated costs of removing assets upon retirement are provided for over the life of those assets as a component of depreciation expense. The Company recovers certain asset retirement costs through rates charged to customers as an approved component of depreciation expense. As of December 31, 2015 and 2014, the Company has approximately $ 10.9 10.3 The Company is recovering in current rates acquisition premiums totaling $ 0.6

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2015
Income Taxes [Abstract]
Income Taxes	Note 3 – Income Taxes Income tax expense differs from the amount computed by applying the statutory rate on book income subject to tax for the following reasons: (Thousands of Dollars) Years Ended December 31, 2015 2014 2013 Income Tax at Statutory Rate $ 10,703 $ 9,786 $ 8,638 Tax Effect of: Utility Plant Related (920 ) (572 ) (527 ) State Income Taxes – Net 745 711 546 Employee Benefits 7 (6 ) (46 ) Other 16 18 10 Total Income Tax Expense $ 10,551 $ 9,937 $ 8,621 Income tax expense is comprised of the following: (Thousands of Dollars) Years Ended December 31, 2015 2014 2013 Current: Federal $ (15,203 ) $ 5,920 $ 5,018 State 1,153 887 688 Deferred: Federal 24,686 3,018 2,855 State (6 ) 191 139 Investment Tax Credits (79 ) (79 ) (79 ) Total Income Tax Expense $ 10,551 $ 9,937 $ 8,621 The statutory review periods for income tax returns for the years prior to 2012 have been closed. The Company has been notified by the Internal Revenue Service (IRS) that the Company's 2014 federal income tax return has been selected for examination. In the event that there is interest and penalties associated with income tax adjustments in future examinations, these amounts will be reported under interest expense and other expense, respectively. Other than the effects of the provision against refundable taxes discussed below, there are no unrecognized tax benefits resulting from prior period tax positions. Deferred income taxes reflect the net tax effect of temporary differences between the carrying amounts of assets and liabilities for financial purposes and the amounts used for income tax purposes. The components of the net deferred tax liability are as follows: (Thousands of Dollars) December 31, 2015 2014 Utility Plant Related $ 63,281 $ 43,996 Customer Advances (3,510 ) (3,570 ) Employee Benefits 5,796 7,223 Investment Tax Credits (ITC) 832 910 Net Operating Loss Carryforwards 2,311 — Other (176 ) (343 ) Total Deferred Tax Liability and ITC $ 68,534 $ 48,216 The IRS has issued final regulations pertaining to the deductibility of costs that qualify as repairs on tangible property. The regulations, which the Company adopted by filing a change in accounting method request with its 2014 Federal income tax return, redefine the characteristics previously used by the Company to determine tax deductibility of expenditures associated with tangible property. Under the regulations, the IRS has provided guidelines for certain industries, but not for regulated public water utilities. Consequently, the Company undertook a comprehensive study to support the adoption and integration of the new regulations into its tax policies prospectively, and to also determine the level of deductibility for income tax purposes for expenditures incurred on projects completed in prior years where such expenditures were capitalized, but may now be considered currently deductible as repairs under the new regulations. Included in its 2014 Federal income tax return, filed in September 2015, the Company submitted support which results in a net reduction of $ 17.6 2.3 7.8 10.3 1.5 5.0 16.8

Commitments and Contingent Liab

Commitments and Contingent Liabilities	12 Months Ended
	Dec. 31, 2015
Commitments and Contingent Liabilities [Abstract]
Commitments and Contingent Liabilities	Note 4 - Commitments and Contingent Liabilities Water Supply 27.0 Middlesex also has an agreement with a non-affiliated regulated water utility for the purchase of treated water. This agreement, which expires February 27, 2021, provides for the minimum purchase of 3.0 Tidewater contracts with the City of Dover, Delaware to purchase treated water 15.0 Purchased water costs are shown below: (Millions of Dollars) Years Ended December 31, Purchased Water 2015 2014 2013 Untreated $ 2.5 $ 2.4 $ 2.4 Treated 3.1 3.1 3.2 Total Costs $ 5.6 $ 5.5 $ 5.6 Contract Operations - 20 20 Guarantees - In September 2013, Middlesex entered into an agreement with the County of Monmouth, New Jersey (Monmouth County) to serve as guarantor of the performance of Applied Water Management, Inc. (AWM) to operate a leachate pretreatment facility, owned by Monmouth County, at the Monmouth County Reclamation Center in Tinton Falls, New Jersey. Middlesex expects to act as guarantor of AWM's performance through at least August 2018 and is contractually obligated to act as guarantor of AWM's performance through unless another guarantor, acceptable to Monmouth County, is identified. In addition, Middlesex entered into agreements with AWM and Natural Systems Utilities, Inc. (NSU), the parent company of AWM, whereby, Middlesex earns a fee for providing the guaranty of AWM's performance to Monmouth County, Middlesex provides operational support to the project if necessary, and AWM and NSU, serving as guarantor to Middlesex with respect to the performance of AWM, indemnify Middlesex against any claims that may arise under the Middlesex guaranty to Monmouth County. Middlesex believes it is unlikely any payments would need to be made under Middlesex's guaranty of AWM's performance to Monmouth County. If asked to perform under the guaranty to Monmouth County, and, if AWM and NSU, as guarantor to Middlesex, do not fulfill their obligations to indemnify Middlesex against any claims that may arise under the Middlesex guaranty to Monmouth County, Middlesex would be required to fulfill the remaining operational commitments of AWM. As of December 31, 2015 and December 31, 2014, the liability recognized in Other Non-Current Liabilities on the balance sheet for the guaranty is approximately $ 0.2 0.3 Construction 47.3 45.4 67.0 no Litigation Change in Control Agreements

Short-term Borrowings

Short-term Borrowings	12 Months Ended
	Dec. 31, 2015
Short-term Borrowings [Abstract]
Short-term Borrowings	Note 5 – Short-term Borrowings Information regarding the Company's short-term borrowings for the years ended December 31, 2015 and 2014 is summarized below: (Millions of Dollars) 2015 2014 Established Lines at Year-End $ 60.0 $ 60.0 Maximum Amount Outstanding 19.0 33.5 Average Outstanding 15.3 27.4 Notes Payable at Year-End 3.0 19.0 Weighted Average Interest Rate 1.19 % 1.41 % Weighted Average Interest Rate at Year-End 1.41 % 1.17 % The maturity dates for the Notes Payable as of December 31, 2015 are in January 2016 and are extendable at the discretion of the Company. Interest rates for short-term borrowings are below the prime rate with no requirement for compensating balances.

Capitalization

Capitalization	12 Months Ended
	Dec. 31, 2015
Capitalization [Abstract]
Capitalization	Note 6 - Capitalization All the transactions discussed below related to the issuance of securities were approved by either the NJBPU or DEPSC, except where otherwise noted. Common Stock The Company periodically issues shares of common stock in connection with its Middlesex Water Company Investment Plan (the Investment Plan), a direct share purchase and sale and dividend reinvestment plan for Middlesex common stock. In July 2015, the Company registered an additional 700,000 3.0 2.3 1.5 1.5 1.7 7 The Company maintains a stock plan for its outside directors (the Outside Director Stock Compensation Plan). For the years ended December 31, 2015, 2014 and 2013, 4,795 5,082 5,432 72,120 100,000 In the event dividends on the preferred stock are in arrears, no no Preferred Stock If four or more quarterly dividends are in arrears, the preferred shareholders, as a class, are entitled to elect two members to the Board of Directors in addition to Directors elected by holders of the common stock. At December 31, 2015 and 2014, there were 0.1 0.1 The Company may not pay any dividends on its common stock unless full cumulative dividends to the preceding dividend date for all outstanding shares of preferred stock have been paid or set aside for payment. All such preferred dividends have been paid. In addition, if Middlesex were to liquidate, holders of preferred stock would be paid back the stated value of their preferred shares before any distributions could be made to common stockholders. The conversion feature of the no 7.00 one twelve 10 twelve In 2014, 4,293 0.5 no 7.00 51,516 The conversion feature of the no 8.00 one 13.714 4,000 0.5 no 8.00 54,856 Long-term Debt In 2014, Tidewater completed a $ 15.0 8.0 7.0 11.0 4.45 4.0 3.8 2.8 0.9 zero 3.0 5.0 In 2014, Tidewater borrowed $ 0.6 1.1 3.45 Bond Series QQ, RR and SS are term bonds with single maturity dates subsequent to 2020. Principal repayments for all series of the Company's long-term debt except for Bond Series X, Y, Z and AA extend beyond 2020. The aggregate annual principal repayment obligations for all long-term debt over the next five Year (Millions of Dollars) Annual Maturities 2016 $ 5.7 2017 $ 6.0 2018 $ 6.4 2019 $ 6.4 2020 $ 6.3 The weighted average interest rate on all long-term debt at both December 31, 2015 and 2014 was 3.87 3.99 45.4 55.4 30.2 9.3 Restricted cash proceeds from New Jersey SRF loans are held in trusts until authorized for distribution. In addition, certain restricted cash proceeds from New Jersey SRF loans are held for debt service requirements. In 2015 2013 0.5 0.1 There were no Substantially all of the Utility Plant of the Company is subject to the lien of its mortgage, which includes debt service and capital ratio covenants. The Company is in compliance with all of its mortgage covenants and restrictions. Earnings Per Share The following table presents the calculation of basic and diluted earnings per share (EPS) for the three 7.00 8.00 (In Thousands, Except Per Share Amounts) 2015 2014 2013 Basic: Income Shares Income Shares Income Shares Net Income $ 20,028 16,175 $ 18,445 16,052 $ 16,633 15,868 Preferred Dividend (144 ) (151 ) (190 ) Earnings Applicable to Common Stock $ 19,884 16,175 $ 18,294 16,052 $ 16,443 15,868 Basic EPS $ 1.23 $ 1.14 $ 1.04 Diluted: Earnings Applicable to Common Stock $ 19,884 16,175 $ 18,294 16,052 $ 16,443 15,868 $ 7.00 67 115 74 133 97 166 $ 8.00 24 41 24 41 40 76 Adjusted Earnings Applicable to Common Stock $ 19,975 16,331 $ 18,392 16,226 $ 16,580 16,110 Diluted EPS $ 1.22 $ 1.13 $ 1.03 Fair Value of Financial Instruments The following methods and assumptions were used by the Company in estimating its fair value disclosure for financial instruments for which it is practicable to estimate that value. The carrying amounts reflected in the consolidated balance sheets for cash and cash equivalents, accounts receivable, accounts payable and notes payable approximate their respective fair values due to the short-term maturities of these instruments. The fair value of the Company's long-term debt relating to Bonds and SRF Notes is based on quoted market prices for similar issues. Under the fair value hierarchy, the fair value of cash and cash equivalents is classified as a Level 1 measurement and the fair value of notes payable and the Bonds and SRF Bonds in the table below are classified as Level 2 (Thousands of Dollars) At December 31, 2015 2014 Carrying Fair Carrying Fair Amount Value Amount Value Bonds $ 85,143 $ 87,972 $ 88,628 $ 90,115 State Revolving Notes $ 457 $ 459 $ 540 $ 542 For other long-term debt for which there was no 54.7 50.8 20.5 22.0

Employee Benefit Plans

Employee Benefit Plans	12 Months Ended
	Dec. 31, 2015
Employee Benefit Plans [Abstract]
Employee Benefit Plans	Note 7 - Employee Benefit Plans Pension Benefits The Company's Pension Plan covers all active employees hired prior to April 1, 2007. Employees hired after March 31, 2007 are not eligible to participate in this plan, but can participate in a defined contribution profit sharing plan that provides an annual contribution at the discretion of the Company, based upon a percentage of the participants' annual paid compensation. In order to be eligible for contribution, the eligible employee must be employed by the Company on December 31 st 2014 62.3 61.9 Other Benefits The Company's Other Benefits Plan covers substantially all of its current retired employees. Employees hired after March 31, 2007 are not eligible to participate in this plan. Coverage includes healthcare and life insurance. Accrued retirement benefit costs are recorded each year. Regulatory Treatment of Over/Underfunded Retirement Obligations Because the Company is subject to regulation in the states in which it operates, it is required to maintain its accounts in accordance with the regulatory authority's rules and guidelines, which may differ from other authoritative accounting pronouncements. In those instances, the Company follows the guidance of ASC 980 Regulated Operations 980 Regulated Operations 715 Compensation – Retirement Benefits The Company uses a December 31 measurement date for all of its employee benefit plans. The tables below sets forth information relating to the Company's Pension Plan and Other Benefits Plan for 2015 and 2014. ( Thousands of Dollars) Pension Plan Other Benefits Plan December 31, 2015 2014 2015 2014 Change in Projected Benefit Obligation: Beginning Balance $ 75,043 $ 56,041 $ 49,578 $ 37,212 Service Cost 2,558 1,894 1,373 1,032 Interest Cost 2,894 2,682 1,921 1,792 Actuarial (Gain) Loss (5,915 ) 16,429 (6,062 ) 10,092 Benefits Paid (2,038 ) (2,003 ) (561 ) (550 ) Ending Balance $ 72,542 $ 75,043 $ 46,249 $ 49,578 ( Thousands of Dollars) Pension Plan Other Benefits Plan December 31, 2015 2014 2015 2014 Change in Fair Value of Plan Assets: Beginning Balance $ 51,623 $ 46,443 $ 27,535 $ 25,145 Actual Return on Plan Assets 11 3,603 350 1,243 Employer Contributions 3,335 3,580 1,694 1,697 Benefits Paid (2,038 ) (2,003 ) (561 ) (550 ) Ending Balance $ 52,931 $ 51,623 $ 29,018 $ 27,535 Funded Status $ (19,611 ) $ (23,420 ) $ (17,231 ) $ (22,043 ) ( Thousands of Dollars) Pension Plan Other Benefits Plan December 31, 2015 2014 2015 2014 Amounts Recognized in the Consolidated Balance Sheets consist of : Current Liability 327 328 — — Noncurrent Liability 19,284 23,092 17,231 22,043 Net Liability Recognized $ 19,611 $ 23,420 $ 17,231 $ 22,043 (Thousands of Dollars) Pension Plan Other Benefits Plan Years Ended December 31, 2015 2014 2013 2015 2014 2013 Components of Net Periodic Benefit Cost Service Cost $ 2,558 $ 1,894 $ 2,300 $ 1,373 $ 1,032 $ 1,338 Interest Cost 2,894 2,682 2,468 1,921 1,792 1,594 Expected Return on Plan Assets (3,919 ) (3,534 ) (2,894 ) (2,107 ) (1,937 ) (1,622 ) Amortization of Net Actuarial Loss 1,645 416 1,632 2,261 1,413 2,066 Amortization of Prior Service Cost/(Credit) — 2 10 (1,728 ) (1,728 ) (1,728 ) Net Periodic Benefit Cost $ 3,178 $ 1,460 $ 3,516 $ 1,720 $ 572 $ 1,648 Amounts that are expected to be amortized from Regulatory Assets into Net Periodic Benefit Cost in 2016 (Thousands of Dollars) Pension Other Actuarial Loss $ 1,426 $ 1,773 Prior Service Credit — (1,728 ) The discount rate and compensation increase rate for determining our postretirement benefit plans' benefit obligations and costs as of December 31, 2015, 2014 and 2013, respectively, are as follows: Pension Plan Other Benefits Plan 2015 2014 2013 2015 2014 2013 Weighted Average Assumptions: Expected Return on Plan Assets 7.50 % 7.50 % 7.50 % 7.50 % 7.50 % 7.50 % Discount Rate for: Benefit Obligation 4.26 % 3.91 % 4.87 % 4.26 % 3.91 % 4.87 % Benefit Cost 3.91 % 4.87 % 3.99 % 3.91 % 4.87 % 3.99 % Compensation Increase for: Benefit Obligation 3.00 % 3.00 % 3.00 % 3.00 % 3.00 % 3.00 % Benefit Cost 3.00 % 3.00 % 3.00 % 3.00 % 3.00 % 3.00 % The compensation increase assumption for the Other Benefits Plan is attributable to life insurance provided to qualifying employees upon their retirement. The insurance coverage will be determined based on the employee's base compensation as of their retirement date. The Company adopted the use of the most recent Society of Actuaries' mortality table (RP 2014) (Mortality Improvement Scale MP2015 for the 2015 valuation). RP 2014 was first used in the determination of our postretirement benefit obligations as of December 31, 2014 and costs for 2015. Use of the RP 2014 mortality table, which extends the assumed life expectancies of our postretirement benefit plan participants, resulted in significant increases to our postretirement benefit obligations and costs. For the 2015 valuation, costs and obligations for our Other Benefits Plan assumed a 9.0 1.0 0.5 5 A one (Thousands of Dollars) 1 Increase Decrease Effect on Current Year's Service and Interest Cost $ 781 $ (589 ) Effect on Projected Benefit Obligation $ 8,267 $ (6,482 ) The following benefit payments, which reflect expected future service, are expected to be paid: (Thousands of Dollars) Year Pension Plan Other Benefits Plan 2016 $ 2,123 $ 876 2017 2,342 1,119 2018 2,393 1,315 2019 2,411 1,512 2020 2,795 1,645 2021-2025 19,641 10,473 Totals $ 31,705 $ 16,940 Benefit Plans Assets The allocation of plan assets at December 31, 2015 and 2014 by asset category is as follows: Pension Plan Other Benefits Plan Asset Category 2015 2014 Target 2015 2014 Target Equity Securities 59.1 % 60.7 % 55 % 50.0 % 49.5 % 43 % Debt Securities 37.8 % 35.8 % 38 % 47.4 % 47.5 % 50 % Cash 1.3 % 1.2 % 2 % 2.4 % 2.8 % 2 % Real Estate/Commodities 1.8 % 2.3 % 5 % 0.2 % 0.2 % 5 % Total 100.0 % 100.0 % 100.0 % 100.0 % Two One The objective of the Company is to maximize the long-term return on retirement plan assets, relative to a reasonable level of risk, maintain a diversified investment portfolio and maintain compliance with the Employee Retirement Income Security Act of 1974. The expected long-term rate of return is based on the various asset categories in which plan assets are invested and the current expectations and historical performance for these categories. Equity securities include Middlesex common stock in the amounts of $ 1.0 2.0 0.9 1.8 Fair Value Measurements Accounting guidance provides a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. The hierarchy gives the 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 described as follows: • Level 1 – Inputs to the valuation methodology are unadjusted quoted market prices for identical assets or liabilities in accessible active markets. • Level 2 – Inputs to the valuation methodology that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. If the asset or liability has a specified contractual term, the Level 2 input must be observable for substantially the full term of the asset or liability. • Level 3 – Inputs to the valuation methodology are unobservable and significant to the fair value measurement. Certain investments in cash and cash equivalents, equity securities, and commodities are valued based on quoted market prices in active markets and are classified as Level 1 investments. Certain investments in cash and cash equivalents, equity securities and fixed income securities are valued using prices received from pricing vendors that utilize observable inputs and are therefore classified as Level 2 investments. The following table presents Middlesex's Pension Plan assets measured and recorded at fair value within the fair value hierarchy as of December 31, 2015 (amounts in thousands): Level 1 Level 2 Level 3 Total Mutual Funds: Small Cap Core $ 251 $ — $ — 251 Small Cap Growth 217 — — 217 Small Cap Value 1,107 — — 1,107 Mid Cap Core 998 — — 998 Mid Cap Value 606 — — 606 Large Cap Blend 955 — — 955 Large Cap Core 15,432 — — 15,432 Foreign Large Core 284 — — 284 Foreign Large Blend 3,775 — — 3,775 Intermediate Term Bond 8,707 — — 8,707 World Bond 11,291 — — 11,291 Money Market Funds: Cash and Cash Equivalents 652 — — 652 Common Equity Securities: Non-Financial Services 202 — — 202 Financial Services 1,704 — — 1,704 Utilities 1,754 — — 1,754 Consumer Growth 1,191 — — 1,191 Consumer Staples 553 — — 553 Consumer Cyclicals 946 — — 946 Industrial Resources 284 — — 284 Capital Equipment 527 — — 527 Technology 1,118 — — 1,118 Energy 377 — — 377 Total Investments $ 52,931 $ — $ — $ 52,931 The following table presents Middlesex's Pension Plan assets measured and recorded at fair value within the fair value hierarchy as of December 31, 2014 (amounts in thousands): Level 1 Level 2 Level 3 Total Mutual Funds: Small Cap Core $ 261 $ — $ — 261 Small Cap Value 876 — — 876 Mid Cap Core 1,013 — — 1,013 Mid Cap Value 627 — — 627 Large Cap Blend 1,187 — — 1,187 Large Cap Core 15,321 — — 15,321 Foreign Large Core 989 — — 989 Foreign Large Growth 449 — — 449 Foreign Large Blend 2,566 — — 2,566 Diversified Emerging Markets 737 — — 737 Intermediate Term Bond 9,824 — — 9,824 World Bond 8,668 — — 8,668 Money Market Funds: Cash and Cash Equivalents 127 386 — 513 Common Equity Securities: Non-Financial Services 280 — — 280 Financial Services 1,656 — — 1,656 Utilities 1,504 — — 1,504 Consumer Growth 1,123 — — 1,123 Consumer Staples 459 — — 459 Consumer Cyclicals 922 — — 922 Industrial Resources 155 — — 155 Capital Equipment 453 — — 453 Technology 1,328 — — 1,328 Energy 712 — — 712 Total Investments $ 51,237 $ 386 $ — $ 51,623 The following table presents Middlesex's Other Benefits Plan assets measured and recorded at fair value within the fair value hierarchy as of December 31, 2015 (amounts in thousands): Level 1 Level 2 Level 3 Total Mutual Funds: Small Cap Core 594 $ — $ — $ 594 Small Cap Growth 40 — — 40 Small Cap Value 101 101 Mid Cap Core 295 — — 295 Mid Cap Growth 135 — — 135 Mid Cap Value 762 — — 762 Large Cap Core 10,912 — — 10,912 Foreign Small Mid Growth 116 — — 116 Foreign Large Blend 413 413 Foreign Large Core 666 — — 666 Foreign Large Growth 138 — — 138 Diversified Emerging Markets 339 — — 339 Real Estate Index 61 — — 61 Money Market Funds: Cash and Cash Equivalents 688 — 688 Preferred Equity Securities 224 — — 224 Agency/US/State/Municipal Debt 13,534 — 13,534 Total Investments $ 15,484 $ 13,534 $ — $ 29,018 The following table presents Middlesex's Other Benefits Plan assets measured and recorded at fair value within the fair value hierarchy as of December 31, 2014 (amounts in thousands): Level 1 Level 2 Level 3 Total Mutual Funds: Small Cap Core $ 491 $ — $ — $ 491 Small Cap Growth 82 — — 82 Mid Cap Core 292 — — 292 Mid Cap Growth 121 — — 121 Mid Cap Value 768 — — 768 Large Cap Core 10,516 — — 10,516 Foreign Small Mid Growth 119 — — 119 Foreign Large Core 735 — — 735 Foreign Large Value 113 — — 113 Diversified Emerging Markets 371 — — 371 Real Estate Index 62 — — 62 Money Market Funds: Cash and Cash Equivalents 450 332 — 782 Preferred Equity Securities 221 — — 221 Agency/US/State/Municipal Debt — 12,862 — 12,862 Total Investments $ 14,341 $ 13,194 $ — $ 27,535 Benefit Plans Contributions For the Pension Plan, Middlesex made total cash contributions of $ 3.3 3.3 For the Other Benefits Plan, Middlesex made total cash contributions of $ 1.7 1.5 401(k) Plan The Company has a 401(k) defined contribution plan, which covers substantially all employees with more than 1,000 100 1 50 1 6 0.6 0.6 0.5 For those employees hired after March 31, 2007, and still actively employed on December 31, 2015, the Company approved, and will fund, a discretionary contribution of $ 0.4 5.0 0.3 Stock-Based Compensation The Company has a stock compensation plan for certain management employees (the 2008 Restricted Stock Plan). The Company maintains an escrow account for 0.1 five 0.3 0.1 The Company recognizes compensation expense at fair value for the restricted stock awards in accordance with ASC 718, Compensation – Stock Compensation five The following table presents information on the 2008 Restricted Stock Plan: Shares (thousands) Unearned (thousands) Weighted Balance, January 1, 2013 114 $ 1,039 Granted 28 589 $ 21.20 Vested (24 ) — Forfeited (1 ) (12 ) Amortization of Compensation Expense — (400 ) Balance, December 31, 2013 117 $ 1,216 Granted 33 711 $ 21.46 Vested (22 ) — Forfeited (1 ) (10 ) Amortization of Compensation Expense — (434 ) Balance, December 31, 2014 127 $ 1,483 Granted 33 741 $ 22.65 Vested (12 ) — Forfeited — — Amortization of Compensation Expense — (528 ) Balance, December 31, 2015 148 $ 1,696 The fair value of vested restricted shares was $ 0.3 0.5 0.5

Business Segment Data

Business Segment Data	12 Months Ended
	Dec. 31, 2015
Business Segment Data [Abstract]
Business Segment Data	Note 8 – Business Segment Data The Company has identified two reportable segments. One is the regulated business of collecting, treating and distributing water on a retail and wholesale basis to residential, commercial, industrial and fire protection customers in parts of New Jersey, Delaware and Pennsylvania. This segment also includes regulated wastewater systems in New Jersey and Delaware. The Company is subject to regulations as to its rates, services and other matters by the states of New Jersey, Delaware and Pennsylvania with respect to utility service within these states. The other segment is primarily comprised of non-regulated contract services for the operation and maintenance of municipal and private water and wastewater systems in New Jersey and Delaware. Inter-segment transactions relating to operational costs are treated as pass-through expenses. Finance charges on inter-segment loan activities are based on interest rates that are below what would normally be charged by a third party lender. (Thousands of Dollars) Years Ended December 31, Operations by Segments: 2015 2014 2013 Revenues: Regulated $ 111,247 $ 103,556 $ 100,910 Non – Regulated 15,238 14,143 14,463 Inter-segment Elimination (460 ) (560 ) (527 ) Consolidated Revenues $ 126,025 $ 117,139 $ 114,846 Operating Income: Regulated $ 33,603 $ 32,000 $ 28,744 Non – Regulated 2,237 2,392 2,226 Consolidated Operating Income $ 35,840 $ 34,392 $ 30,970 Depreciation: Regulated $ 11,874 $ 11,262 $ 10,807 Non – Regulated 177 182 181 Consolidated Depreciation $ 12,051 $ 11,444 $ 10,988 Other Income (Expense), Net: Regulated $ 619 $ 157 $ 828 Non – Regulated 20 (75 ) (14 Inter-segment Elimination (346 ) (485 ) (723 ) Consolidated Other Income (Expense), Net $ 293 $ (403 ) $ 91 Interest Expense: Regulated $ 5,554 $ 5,607 $ 5,807 Non – Regulated 89 91 97 Inter-segment Elimination (89 ) (91 ) (97 ) Consolidated Interest Charges $ 5,554 $ 5,607 $ 5,807 Income Taxes: Regulated $ 9,522 $ 8,907 $ 7,635 Non – Regulated 1,029 1,030 986 Consolidated Income Taxes $ 10,551 $ 9,937 $ 8,621 Net Income: Regulated $ 18,889 $ 17,249 $ 15,504 Non – Regulated 1,139 1,196 1,129 Consolidated Net Income $ 20,028 $ 18,445 $ 16,633 Capital Expenditures: Regulated $ 25,706 $ 22,498 $ 19,894 Non – Regulated 67 98 186 Total Capital Expenditures $ 25,773 $ 22,596 $ 20,080 (Thousands of Dollars) As of December 31, 2015 As of December 31, 2014 Assets: Regulated $ 584,660 $ 574,854 Non – Regulated 6,436 7,252 Inter-segment Elimination (6,374 ) (6,334 ) Consolidated Assets $ 584,722 $ 575,772

Quarterly Operating Results - U

Quarterly Operating Results - Unaudited	12 Months Ended
	Dec. 31, 2015
Quarterly Operating Results - Unaudited [Abstract]
Quarterly Operating Results - Unaudited	Note 9 - Quarterly Operating Results - Unaudited Operating results for each quarter of 2015 and 2014 are as follows: (Thousands of Dollars, Except per Share Data) 2015 1 st 2 nd 3 rd 4 th Total Operating Revenues $ 28,780 $ 31,666 $ 34,654 $ 30,925 $ 126,025 Operating Income 6,685 9,235 11,460 8,460 35,840 Net Income 3,636 5,089 6,743 4,560 20,028 Basic Earnings per Share $ 0.22 $ 0.31 $ 0.41 $ 0.29 $ 1.23 Diluted Earnings per Share $ 0.22 $ 0.31 $ 0.41 $ 0.28 $ 1.22 2014 1 st 2 nd 3 rd 4 th Total Operating Revenues $ 27,173 $ 29,190 $ 32,669 $ 28,107 $ 117,139 Operating Income 5,967 8,747 11,620 8,058 34,392 Net Income 3,169 4,728 6,758 3,790 18,445 Basic Earnings per Share $ 0.20 $ 0.29 $ 0.42 $ 0.23 $ 1.14 Diluted Earnings per Share $ 0.20 $ 0.29 $ 0.42 $ 0.22 $ 1.13 The information above, in the opinion of the Company, includes all adjustments consisting only of normal recurring accruals necessary for a fair presentation of such amounts. The business of the Company is subject to seasonal fluctuation with the peak period usually occurring during the summer months. The quarterly earnings per share amounts above may differ from previous filings due to the effects of rounding.

Organization, Summary of Sign19

Organization, Summary of Significant Accounting Policies and Recent Developments (Policies)	12 Months Ended
	Dec. 31, 2015
Organization Summary Of Significant Accounting Policies And Recent Developments [Abstract]
Organization	(a) Organization Middlesex Water Company has operated as a water utility in New Jersey since 1897, in Delaware, through our wholly-owned subsidiary, Tidewater, since 1992 and in Pennsylvania, through our wholly-owned subsidiary, Twin Lakes, since 2009. We are in the business of collecting, treating, distributing and selling water for domestic, commercial, municipal, industrial and fire protection purposes. We also operate New Jersey municipal water, wastewater and storm water systems under contract and provide unregulated water and wastewater services in New Jersey and Delaware through our subsidiaries. We also have an investment in a joint venture, Ridgewood Green RME, LLC, that owns and operates facilities which optimize the production of electricity at the Village of Ridgewood, New Jersey wastewater treatment plant and other municipal facilities. Our rates charged to customers for water and wastewater services, the quality of services we provide and certain other matters are regulated in New Jersey, Delaware and Pennsylvania by the New Jersey Board of Public Utilities (NJBPU), Delaware Public Service Commission (DEPSC) and Pennsylvania Public Utilities Commission (PAPUC), respectively. Our USA, USA-PA and White Marsh subsidiaries are not regulated utilities.
Principles of Consolidation	(b) Principles of Consolidation – The financial statements for Middlesex and its wholly-owned subsidiaries (the Company) are reported on a consolidated basis. All significant intercompany accounts and transactions have been eliminated. Other financial investments in which the Company holds a 50 % or less voting interest and cannot exercise control over the operation and policies of the investments are accounted for under the equity method of accounting. Under the equity method of accounting, the Company records its investment interests in Non Utility Assets and its percentage share of the earnings or losses of the investees in Other Income (Expense).
System of Accounts	(c) System of Accounts – Middlesex, Pinelands Water and Pinelands Wastewater maintain their accounts in accordance with the Uniform System of Accounts prescribed by the NJBPU. Tidewater, TESI and Southern Shores maintain their accounts in accordance with DEPSC requirements. Twin Lakes maintains its accounts in accordance with PAPUC requirements.
Regulatory Accounting	(d) Regulatory Accounting 88 99 Accounting Standards Codification (ASC) Regulated Operations In accordance with ASC 980, Regulated Operations no
Retirement Benefit Plans	(e) Retirement Benefit Plans The Company's costs for providing retirement benefits are dependent upon numerous factors, including actual plan experience and assumptions of future experience. Retirement benefit plan obligations and expense are determined based on investment performance, discount rates and various other demographic factors related to the population participating in the Company's retirement benefit plans, all of which can change significantly in future years. For more information on the Company's Retirement Benefit Plans, see Note 7
Utility Plant	(f) Utility Plant – Utility Plant is stated at original cost as defined for regulatory purposes. Property accounts are charged with the cost of betterments and major replacements of property. Cost includes direct material, labor and indirect charges for pension benefits and payroll taxes. The cost of labor, materials, supervision and other expenses incurred in making repairs and minor replacements and in maintaining the properties is charged to the appropriate expense accounts. At December 31, 2015, there was no event or change in circumstance that would indicate that the carrying amount of any long-lived asset was not recoverable.
Depreciation	(g) Depreciation – These rates have been approved by the NJBPU, DEPSC or PAPUC: Source of Supply 1.15 3.44 Transmission and Distribution (T&D): Pumping 2.87 5.39 T&D – Mains 1.10 3.13 Water Treatment 1.65 7.09 T&D – Services 2.12 3.16 General Plant 2.08 17.84 T&D – Other 1.61 4.63 Non-regulated fixed assets consist primarily of office buildings, furniture and fixtures, and transportation equipment. These assets are recorded at original cost and depreciation is calculated based on the estimated useful lives, ranging from 3 40
Preliminary Survey and Investigation (PS&I) Costs	(h) Preliminary Survey and Investigation (PS&I) Costs – In the design of water and wastewater systems that the Company ultimately intends to construct, own and operate certain expenditures are incurred to advance those project activities. These PS&I costs are recorded as deferred charges on the balance sheet because these costs are expected to be recovered through future rates charged to customers as the underlying projects are placed into service as utility plant. If it is subsequently determined that costs for a project recorded as PS&I are not recoverable through rates charged to our customers, the applicable PS&I costs are recorded as Other Expense on the statement of income at that time.
Customers' Advances for Construction (CAC)	(i) Customers' Advances for Construction (CAC) – plant and/or cash advances are provided to the Company by customers, real estate developers and builders in order to extend utility service to their properties. These transactions are recorded as CAC. Contractual Refunds of CACs in the form of cash are made by the Company and are based on either additional operating revenues generated from new customers or as new customers are connected to the respective system. After all refunds are made and/or contract terms have expired, any remaining balance is transferred to Contributions in Aid of Construction. Contributions in Aid of Construction (CIAC) CAC and CIAC are not depreciated in accordance with regulatory requirements. In addition, these amounts reduce the investment base for purposes of setting rates.
Allowance for Funds Used During Construction (AFUDC)	(j) Allowance for Funds Used During Construction (AFUDC) The AFUDC rates for the years ended December 31, 2015, 2014 and 2013 for Middlesex and Tidewater are as follows: 2015 2014 2013 Middlesex 6.72 7.03 7.34 Tidewater 7.92 7.91 7.91
Accounts Receivable	(k) Accounts Receivable – We record bad debt expense based on historical write-offs combined with an evaluation of current conditions. The allowance for doubtful accounts was $ 0.8 million and $ 0.7 million as of December 31, 2015 and 2014 , respectively. For the years ended December 31, 2015, 2014 and 2013 , bad debt expense was $ 0.8 million, $ 0.7 0.7 For the years ended December 31, 2015, 2014 and 2013, write-offs were $ 0.6 0.6 0.9 Receivables not expected to be received in 2016 are included as non-current assets in Operations Contracts, Developer and Other Receivables.
Revenues	(l) Revenues Retail customer invoices for regulated utility service are typically comprised of two components; a fixed service charge and a volumetric or consumption charge. Revenues from retail customers, except Tidewater fixed service charges, include amounts billed in arrears on a cycle basis and unbilled amounts estimated from the last meter reading date to the end of the accounting period. The estimated unbilled amounts are determined by utilizing factors which include historical volumetric or consumption usage and current climate and economic conditions. Actual billings may differ from our estimates. Tidewater customers are billed in advance for their fixed service charge and these revenues are recognized as the service is provided to the customer. Southern Shores is an unmetered system. Customers are billed a fixed service charge in advance at the beginning of each month and revenues are recognized as earned. Customers in portions of the TESI system are billed a fixed service charge in arrears. Revenues from the City of Perth Amboy management contract are comprised of fixed and variable fees. Fixed fees, which have been set for the life of the contract, are billed monthly and recorded as earned. Variable fees, which are not significant, are recorded upon approval of the amount by the City of Perth Amboy. Revenues from USA's operations and maintenance contract for the Borough of Avalon, New Jersey (Avalon) water utility, sewer utility and storm water system are fixed for the life of the contract, are billed monthly and recorded as earned. USA also provides services to Avalon in addition to the base services provided under the operation and maintenance contract. These additional services are recorded as earned and billed upon approval of Avalon.
Deferred Charges and Other Assets	(m) Deferred Charges and Other Assets - Unamortized Debt Expense is amortized over the lives of the related issues. Restricted Cash represents proceeds from loans entered into through state financing programs and is held in trusts. The proceeds are restricted for specific capital expenditures and debt service requirements.
Income Taxes	(n) Income Taxes - Middlesex files a consolidated federal income tax return for the Company and income taxes are allocated based on the separate return method. Investment tax credits have been deferred and are amortized over the estimated useful life of the related property. For more information on income taxes, see Note 3 – Income Taxes
Statements of Cash Flows	(o) Statements of Cash Flows - For purposes of reporting cash flows, the Company considers all highly liquid investments with original maturity dates of three months or less to be cash equivalents. Cash and cash equivalents represent bank balances and money market funds with investments maturing in less than 90 days.
Use of Estimates	(p) Use of Estimates - Conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts in the financial statements. Actual results could differ from those estimates.
Recent Accounting Pronouncements	(q) Recent Accounting Pronouncements Revenue Recognition - Consolidation Debt Issuance Costs Inventory Deferred Income Taxes Recognition and Measurement of Financial Assets and Financial Liabilities

Organization, Summary of Sign20

Organization, Summary of Significant Accounting Policies and Recent Developments (Tables)	12 Months Ended
	Dec. 31, 2015
Organization Summary Of Significant Accounting Policies And Recent Developments [Abstract]
Range of depreciation rates	Source of Supply 1.15 3.44 Transmission and Distribution (T&D): Pumping 2.87 5.39 T&D – Mains 1.10 3.13 Water Treatment 1.65 7.09 T&D – Services 2.12 3.16 General Plant 2.08 17.84 T&D – Other 1.61 4.63
Allowance for Funds Used During Construction Rates	2015 2014 2013 Middlesex 6.72 7.03 7.34 Tidewater 7.92 7.91 7.91

Rate and Regulatory Matters (Ta

Rate and Regulatory Matters (Tables)	12 Months Ended
	Dec. 31, 2015
Rate and Regulatory Matters [Abstract]
Schedule of regulatory assets	(Thousands of Dollars) December 31, Remaining Regulatory Assets 2015 2014 Recovery Periods Retirement Benefits $ 39,378 $ 47,868 Various Income Taxes 15,541 17,195 Various Rate Cases, Tank Painting, and Other 3,633 1,153 2 9 years Total $ 58,552 $ 66,216

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2015
Income Taxes [Abstract]
Income tax expense reconciliation	(Thousands of Dollars) Years Ended December 31, 2015 2014 2013 Income Tax at Statutory Rate $ 10,703 $ 9,786 $ 8,638 Tax Effect of: Utility Plant Related (920 ) (572 ) (527 ) State Income Taxes – Net 745 711 546 Employee Benefits 7 (6 ) (46 ) Other 16 18 10 Total Income Tax Expense $ 10,551 $ 9,937 $ 8,621
Income tax expense	(Thousands of Dollars) Years Ended December 31, 2015 2014 2013 Current: Federal $ (15,203 ) $ 5,920 $ 5,018 State 1,153 887 688 Deferred: Federal 24,686 3,018 2,855 State (6 ) 191 139 Investment Tax Credits (79 ) (79 ) (79 ) Total Income Tax Expense $ 10,551 $ 9,937 $ 8,621
Deferred tax liability	(Thousands of Dollars) December 31, 2015 2014 Utility Plant Related $ 63,281 $ 43,996 Customer Advances (3,510 ) (3,570 ) Employee Benefits 5,796 7,223 Investment Tax Credits (ITC) 832 910 Net Operating Loss Carryforwards 2,311 — Other (176 ) (343 ) Total Deferred Tax Liability and ITC $ 68,534 $ 48,216

Commitments and Contingent Li23

Commitments and Contingent Liabilities (Tables)	12 Months Ended
	Dec. 31, 2015
Commitments and Contingent Liabilities [Abstract]
Schedule of water cost purchased	(Millions of Dollars) Years Ended December 31, Purchased Water 2015 2014 2013 Untreated $ 2.5 $ 2.4 $ 2.4 Treated 3.1 3.1 3.2 Total Costs $ 5.6 $ 5.5 $ 5.6

Short Term Borrowings (Tables)

Short Term Borrowings (Tables)	12 Months Ended
	Dec. 31, 2015
Short-term Borrowings [Abstract]
Schedule of information regarding short-term borrowings	Information regarding the Company's short-term borrowings for the years ended December 31, 2015 and 2014 is summarized below: (Millions of Dollars) 2015 2014 Established Lines at Year-End $ 60.0 $ 60.0 Maximum Amount Outstanding 19.0 33.5 Average Outstanding 15.3 27.4 Notes Payable at Year-End 3.0 19.0 Weighted Average Interest Rate 1.19 % 1.41 % Weighted Average Interest Rate at Year-End 1.41 % 1.17 %

Capitalization (Tables)

Capitalization (Tables)	12 Months Ended
	Dec. 31, 2015
Capitalization [Abstract]
Schedule of maturities of long term debt	Year (Millions of Dollars) Annual Maturities 2016 $ 5.7 2017 $ 6.0 2018 $ 6.4 2019 $ 6.4 2020 $ 6.3
Schedule of earnings per share	(In Thousands, Except Per Share Amounts) 2015 2014 2013 Basic: Income Shares Income Shares Income Shares Net Income $ 20,028 16,175 $ 18,445 16,052 $ 16,633 15,868 Preferred Dividend (144 ) (151 ) (190 ) Earnings Applicable to Common Stock $ 19,884 16,175 $ 18,294 16,052 $ 16,443 15,868 Basic EPS $ 1.23 $ 1.14 $ 1.04 Diluted: Earnings Applicable to Common Stock $ 19,884 16,175 $ 18,294 16,052 $ 16,443 15,868 $ 7.00 67 115 74 133 97 166 $ 8.00 24 41 24 41 40 76 Adjusted Earnings Applicable to Common Stock $ 19,975 16,331 $ 18,392 16,226 $ 16,580 16,110 Diluted EPS $ 1.22 $ 1.13 $ 1.03
Schedule of carrying amount and estimated fair value of bonds	(Thousands of Dollars) At December 31, 2015 2014 Carrying Fair Carrying Fair Amount Value Amount Value Bonds $ 85,143 $ 87,972 $ 88,628 $ 90,115 State Revolving Notes $ 457 $ 459 $ 540 $ 542

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	12 Months Ended
	Dec. 31, 2015
Employee Benefit Plans [Abstract]
Change in projected benefit obligation and fair value of plan assets	( Thousands of Dollars) Pension Plan Other Benefits Plan December 31, 2015 2014 2015 2014 Change in Projected Benefit Obligation: Beginning Balance $ 75,043 $ 56,041 $ 49,578 $ 37,212 Service Cost 2,558 1,894 1,373 1,032 Interest Cost 2,894 2,682 1,921 1,792 Actuarial (Gain) Loss (5,915 ) 16,429 (6,062 ) 10,092 Benefits Paid (2,038 ) (2,003 ) (561 ) (550 ) Ending Balance $ 72,542 $ 75,043 $ 46,249 $ 49,578 ( Thousands of Dollars) Pension Plan Other Benefits Plan December 31, 2015 2014 2015 2014 Change in Fair Value of Plan Assets: Beginning Balance $ 51,623 $ 46,443 $ 27,535 $ 25,145 Actual Return on Plan Assets 11 3,603 350 1,243 Employer Contributions 3,335 3,580 1,694 1,697 Benefits Paid (2,038 ) (2,003 ) (561 ) (550 ) Ending Balance $ 52,931 $ 51,623 $ 29,018 $ 27,535 Funded Status $ (19,611 ) $ (23,420 ) $ (17,231 ) $ (22,043 )
Amounts recognized in balance sheet	( Thousands of Dollars) Pension Plan Other Benefits Plan December 31, 2015 2014 2015 2014 Amounts Recognized in the Consolidated Balance Sheets consist of : Current Liability 327 328 — — Noncurrent Liability 19,284 23,092 17,231 22,043 Net Liability Recognized $ 19,611 $ 23,420 $ 17,231 $ 22,043
Components of net benefit cost	(Thousands of Dollars) Pension Plan Other Benefits Plan Years Ended December 31, 2015 2014 2013 2015 2014 2013 Components of Net Periodic Benefit Cost Service Cost $ 2,558 $ 1,894 $ 2,300 $ 1,373 $ 1,032 $ 1,338 Interest Cost 2,894 2,682 2,468 1,921 1,792 1,594 Expected Return on Plan Assets (3,919 ) (3,534 ) (2,894 ) (2,107 ) (1,937 ) (1,622 ) Amortization of Net Actuarial Loss 1,645 416 1,632 2,261 1,413 2,066 Amortization of Prior Service Cost/(Credit) — 2 10 (1,728 ) (1,728 ) (1,728 ) Net Periodic Benefit Cost $ 3,178 $ 1,460 $ 3,516 $ 1,720 $ 572 $ 1,648
Amounts expected to be amortized from regulatory assets	(Thousands of Dollars) Pension Other Actuarial Loss $ 1,426 $ 1,773 Prior Service Credit — (1,728 )
Discount and compensation rates	Pension Plan Other Benefits Plan 2015 2014 2013 2015 2014 2013 Weighted Average Assumptions: Expected Return on Plan Assets 7.50 % 7.50 % 7.50 % 7.50 % 7.50 % 7.50 % Discount Rate for: Benefit Obligation 4.26 % 3.91 % 4.87 % 4.26 % 3.91 % 4.87 % Benefit Cost 3.91 % 4.87 % 3.99 % 3.91 % 4.87 % 3.99 % Compensation Increase for: Benefit Obligation 3.00 % 3.00 % 3.00 % 3.00 % 3.00 % 3.00 % Benefit Cost 3.00 % 3.00 % 3.00 % 3.00 % 3.00 % 3.00 %
Effect of One-Percentage-Point Change in Assumed Health Care Cost Trend Rates	(Thousands of Dollars) 1 Increase Decrease Effect on Current Year's Service and Interest Cost $ 781 $ (589 ) Effect on Projected Benefit Obligation $ 8,267 $ (6,482 )
Expected benefit payments	(Thousands of Dollars) Year Pension Plan Other Benefits Plan 2016 $ 2,123 $ 876 2017 2,342 1,119 2018 2,393 1,315 2019 2,411 1,512 2020 2,795 1,645 2021-2025 19,641 10,473 Totals $ 31,705 $ 16,940
Allocation of plan assets	Pension Plan Other Benefits Plan Asset Category 2015 2014 Target 2015 2014 Target Equity Securities 59.1 % 60.7 % 55 % 50.0 % 49.5 % 43 % Debt Securities 37.8 % 35.8 % 38 % 47.4 % 47.5 % 50 % Cash 1.3 % 1.2 % 2 % 2.4 % 2.8 % 2 % Real Estate/Commodities 1.8 % 2.3 % 5 % 0.2 % 0.2 % 5 % Total 100.0 % 100.0 % 100.0 % 100.0 %
Fair value of plan assets	The following table presents Middlesex's Pension Plan assets measured and recorded at fair value within the fair value hierarchy as of December 31, 2015 (amounts in thousands): Level 1 Level 2 Level 3 Total Mutual Funds: Small Cap Core $ 251 $ — $ — 251 Small Cap Growth 217 — — 217 Small Cap Value 1,107 — — 1,107 Mid Cap Core 998 — — 998 Mid Cap Value 606 — — 606 Large Cap Blend 955 — — 955 Large Cap Core 15,432 — — 15,432 Foreign Large Core 284 — — 284 Foreign Large Blend 3,775 — — 3,775 Intermediate Term Bond 8,707 — — 8,707 World Bond 11,291 — — 11,291 Money Market Funds: Cash and Cash Equivalents 652 — — 652 Common Equity Securities: Non-Financial Services 202 — — 202 Financial Services 1,704 — — 1,704 Utilities 1,754 — — 1,754 Consumer Growth 1,191 — — 1,191 Consumer Staples 553 — — 553 Consumer Cyclicals 946 — — 946 Industrial Resources 284 — — 284 Capital Equipment 527 — — 527 Technology 1,118 — — 1,118 Energy 377 — — 377 Total Investments $ 52,931 $ — $ — $ 52,931 The following table presents Middlesex's Pension Plan assets measured and recorded at fair value within the fair value hierarchy as of December 31, 2014 (amounts in thousands): Level 1 Level 2 Level 3 Total Mutual Funds: Small Cap Core $ 261 $ — $ — 261 Small Cap Value 876 — — 876 Mid Cap Core 1,013 — — 1,013 Mid Cap Value 627 — — 627 Large Cap Blend 1,187 — — 1,187 Large Cap Core 15,321 — — 15,321 Foreign Large Core 989 — — 989 Foreign Large Growth 449 — — 449 Foreign Large Blend 2,566 — — 2,566 Diversified Emerging Markets 737 — — 737 Intermediate Term Bond 9,824 — — 9,824 World Bond 8,668 — — 8,668 Money Market Funds: Cash and Cash Equivalents 127 386 — 513 Common Equity Securities: Non-Financial Services 280 — — 280 Financial Services 1,656 — — 1,656 Utilities 1,504 — — 1,504 Consumer Growth 1,123 — — 1,123 Consumer Staples 459 — — 459 Consumer Cyclicals 922 — — 922 Industrial Resources 155 — — 155 Capital Equipment 453 — — 453 Technology 1,328 — — 1,328 Energy 712 — — 712 Total Investments $ 51,237 $ 386 $ — $ 51,623 The following table presents Middlesex's Other Benefits Plan assets measured and recorded at fair value within the fair value hierarchy as of December 31, 2015 (amounts in thousands): Level 1 Level 2 Level 3 Total Mutual Funds: Small Cap Core 594 $ — $ — $ 594 Small Cap Growth 40 — — 40 Small Cap Value 101 101 Mid Cap Core 295 — — 295 Mid Cap Growth 135 — — 135 Mid Cap Value 762 — — 762 Large Cap Core 10,912 — — 10,912 Foreign Small Mid Growth 116 — — 116 Foreign Large Blend 413 413 Foreign Large Core 666 — — 666 Foreign Large Growth 138 — — 138 Diversified Emerging Markets 339 — — 339 Real Estate Index 61 — — 61 Money Market Funds: Cash and Cash Equivalents 688 — 688 Preferred Equity Securities 224 — — 224 Agency/US/State/Municipal Debt 13,534 — 13,534 Total Investments $ 15,484 $ 13,534 $ — $ 29,018 The following table presents Middlesex's Other Benefits Plan assets measured and recorded at fair value within the fair value hierarchy as of December 31, 2014 (amounts in thousands): Level 1 Level 2 Level 3 Total Mutual Funds: Small Cap Core $ 491 $ — $ — $ 491 Small Cap Growth 82 — — 82 Mid Cap Core 292 — — 292 Mid Cap Growth 121 — — 121 Mid Cap Value 768 — — 768 Large Cap Core 10,516 — — 10,516 Foreign Small Mid Growth 119 — — 119 Foreign Large Core 735 — — 735 Foreign Large Value 113 — — 113 Diversified Emerging Markets 371 — — 371 Real Estate Index 62 — — 62 Money Market Funds: Cash and Cash Equivalents 450 332 — 782 Preferred Equity Securities 221 — — 221 Agency/US/State/Municipal Debt — 12,862 — 12,862 Total Investments $ 14,341 $ 13,194 $ — $ 27,535
Restricted stock plan	Shares (thousands) Unearned (thousands) Weighted Balance, January 1, 2013 114 $ 1,039 Granted 28 589 $ 21.20 Vested (24 ) — Forfeited (1 ) (12 ) Amortization of Compensation Expense — (400 ) Balance, December 31, 2013 117 $ 1,216 Granted 33 711 $ 21.46 Vested (22 ) — Forfeited (1 ) (10 ) Amortization of Compensation Expense — (434 ) Balance, December 31, 2014 127 $ 1,483 Granted 33 741 $ 22.65 Vested (12 ) — Forfeited — — Amortization of Compensation Expense — (528 ) Balance, December 31, 2015 148 $ 1,696

Business Segment Data (Tables)

Business Segment Data (Tables)	12 Months Ended
	Dec. 31, 2015
Business Segment Data [Abstract]
Schedule of Segment Reporting Information, by Segment	(Thousands of Dollars) Years Ended December 31, Operations by Segments: 2015 2014 2013 Revenues: Regulated $ 111,247 $ 103,556 $ 100,910 Non – Regulated 15,238 14,143 14,463 Inter-segment Elimination (460 ) (560 ) (527 ) Consolidated Revenues $ 126,025 $ 117,139 $ 114,846 Operating Income: Regulated $ 33,603 $ 32,000 $ 28,744 Non – Regulated 2,237 2,392 2,226 Consolidated Operating Income $ 35,840 $ 34,392 $ 30,970 Depreciation: Regulated $ 11,874 $ 11,262 $ 10,807 Non – Regulated 177 182 181 Consolidated Depreciation $ 12,051 $ 11,444 $ 10,988 Other Income (Expense), Net: Regulated $ 619 $ 157 $ 828 Non – Regulated 20 (75 ) (14 Inter-segment Elimination (346 ) (485 ) (723 ) Consolidated Other Income (Expense), Net $ 293 $ (403 ) $ 91 Interest Expense: Regulated $ 5,554 $ 5,607 $ 5,807 Non – Regulated 89 91 97 Inter-segment Elimination (89 ) (91 ) (97 ) Consolidated Interest Charges $ 5,554 $ 5,607 $ 5,807 Income Taxes: Regulated $ 9,522 $ 8,907 $ 7,635 Non – Regulated 1,029 1,030 986 Consolidated Income Taxes $ 10,551 $ 9,937 $ 8,621 Net Income: Regulated $ 18,889 $ 17,249 $ 15,504 Non – Regulated 1,139 1,196 1,129 Consolidated Net Income $ 20,028 $ 18,445 $ 16,633 Capital Expenditures: Regulated $ 25,706 $ 22,498 $ 19,894 Non – Regulated 67 98 186 Total Capital Expenditures $ 25,773 $ 22,596 $ 20,080 (Thousands of Dollars) As of December 31, 2015 As of December 31, 2014 Assets: Regulated $ 584,660 $ 574,854 Non – Regulated 6,436 7,252 Inter-segment Elimination (6,374 ) (6,334 ) Consolidated Assets $ 584,722 $ 575,772

Quarterly Operating Results -28

Quarterly Operating Results - Unaudited (Tables)	12 Months Ended
	Dec. 31, 2015
Quarterly Operating Results - Unaudited [Abstract]
Quarterly financial information	(Thousands of Dollars, Except per Share Data) 2015 1 st 2 nd 3 rd 4 th Total Operating Revenues $ 28,780 $ 31,666 $ 34,654 $ 30,925 $ 126,025 Operating Income 6,685 9,235 11,460 8,460 35,840 Net Income 3,636 5,089 6,743 4,560 20,028 Basic Earnings per Share $ 0.22 $ 0.31 $ 0.41 $ 0.29 $ 1.23 Diluted Earnings per Share $ 0.22 $ 0.31 $ 0.41 $ 0.28 $ 1.22 2014 1 st 2 nd 3 rd 4 th Total Operating Revenues $ 27,173 $ 29,190 $ 32,669 $ 28,107 $ 117,139 Operating Income 5,967 8,747 11,620 8,058 34,392 Net Income 3,169 4,728 6,758 3,790 18,445 Basic Earnings per Share $ 0.20 $ 0.29 $ 0.42 $ 0.23 $ 1.14 Diluted Earnings per Share $ 0.20 $ 0.29 $ 0.42 $ 0.22 $ 1.13

Organization, Summary of Sign29

Organization, Summary of Significant Accounting Policies and Recent Developments (Narrative) (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended		12 Months Ended
	Nov. 30, 2015	Dec. 31, 2015	Jun. 30, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Organization, Summary Of Significant Accounting Policies And Recent Developments [Line Items]
Percent voting interest				50.00%
Percent of operating revenues				88.00%
Percent of total assets				99.00%
Allowance for doubtful accounts		$ 0.8		$ 0.8	$ 0.7
Bad debt expense				0.8	0.7	$ 0.7
Write-offs				$ 0.6	$ 0.6	$ 0.9
Pinelands Water [Member]
Organization, Summary Of Significant Accounting Policies And Recent Developments [Line Items]
Originally filed increase in annual operating revenue		0.3
Pinelands Wastewater [Member]
Organization, Summary Of Significant Accounting Policies And Recent Developments [Line Items]
Originally filed increase in annual operating revenue		0.2
Twin Lakes [Member]
Organization, Summary Of Significant Accounting Policies And Recent Developments [Line Items]
Originally filed increase in annual operating revenue	$ 0.2	$ 0.2
New Jersey Board of Public Utilities [Member]
Organization, Summary Of Significant Accounting Policies And Recent Developments [Line Items]
Approved increase in annual operating revenues			$ 5

Organization, Summary of Sign30

Organization, Summary of Significant Accounting Policies and Recent Developments (Schedule of Depreciation Rates) (Details)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Source of Supply [Member] | Minimum [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Disclosure of Composite Depreciation Rate for Plants in Service	1.15%	1.15%	1.15%
Source of Supply [Member] | Maximum [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Disclosure of Composite Depreciation Rate for Plants in Service	3.44%	3.44%	3.44%
Pumping [Member] | Minimum [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Disclosure of Composite Depreciation Rate for Plants in Service	2.87%	2.87%	2.87%
Pumping [Member] | Maximum [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Disclosure of Composite Depreciation Rate for Plants in Service	5.39%	5.39%	5.39%
Water Treatment [Member] | Minimum [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Disclosure of Composite Depreciation Rate for Plants in Service	1.65%	1.65%	1.65%
Water Treatment [Member] | Maximum [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Disclosure of Composite Depreciation Rate for Plants in Service	7.09%	7.09%	7.09%
General Plant [Member] | Minimum [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Disclosure of Composite Depreciation Rate for Plants in Service	2.08%	2.08%	2.08%
General Plant [Member] | Maximum [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Disclosure of Composite Depreciation Rate for Plants in Service	17.84%	17.84%	17.84%
T&D Mains [Member] | Minimum [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Disclosure of Composite Depreciation Rate for Plants in Service	1.10%	1.10%	1.10%
T&D Mains [Member] | Maximum [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Disclosure of Composite Depreciation Rate for Plants in Service	3.13%	3.13%	3.13%
T&D Services [Member] | Minimum [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Disclosure of Composite Depreciation Rate for Plants in Service	2.12%	2.12%	2.12%
T&D Services [Member] | Maximum [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Disclosure of Composite Depreciation Rate for Plants in Service	3.16%	3.16%	3.16%
T&D Other [Member] | Minimum [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Disclosure of Composite Depreciation Rate for Plants in Service	1.61%	1.61%	1.61%
T&D Other [Member] | Maximum [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Disclosure of Composite Depreciation Rate for Plants in Service	4.63%	4.63%	4.63%

Organization, Summary of Sign31

Organization, Summary of Significant Accounting Policies and Recent Developments (Schedule of AFUDC Rates) (Details)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Middlesex [Member]
Organization, Summary Of Significant Accounting Policies And Recent Developments [Line Items]
Allowance for Funds Used During Construction Rates	6.72%	7.03%	7.34%
Tidewater [Member]
Organization, Summary Of Significant Accounting Policies And Recent Developments [Line Items]
Allowance for Funds Used During Construction Rates	7.92%	7.91%	7.91%

Rate and Regulatory Matters (Na

Rate and Regulatory Matters (Narrative) (Details) $ in Thousands

Jul. 02, 2014USD ($)

Apr. 19, 2014USD ($)

Nov. 25, 2013USD ($)

Nov. 08, 2013USD ($)

Nov. 30, 2015USD ($)

Mar. 31, 2015USD ($)

Oct. 31, 2014USD ($)

Jun. 30, 2014USD ($)

Oct. 31, 2013USD ($)N

Mar. 31, 2013USD ($)

Aug. 31, 2012USD ($)

Jun. 30, 2011USD ($)

Dec. 31, 2015USD ($)

Jun. 30, 2015USD ($)

Dec. 31, 2015USD ($)

Dec. 31, 2014USD ($)

Regulatory Liabilities [Line Items]

Regulatory Liability - Cost of Utility Plant Removal

$ 10,876

$ 10,876

$ 10,273

Acquisition premiums to be recovered

600

600

Pinelands Water and Wastewater [Member]

Regulatory Liabilities [Line Items]

Originally filed increase in annual operating revenue

300

Pinelands Wastewater [Member]

Regulatory Liabilities [Line Items]

Originally filed increase in annual operating revenue

200

Twin Lakes [Member]

Regulatory Liabilities [Line Items]

Originally filed increase in annual operating revenue

$ 200

$ 200

New Jersey Board of Public Utilities [Member]

Regulatory Liabilities [Line Items]

Approved increase in annual operating revenues

$ 5,000

New Jersey Board of Public Utilities [Member] | Middlesex [Member]

Regulatory Liabilities [Line Items]

Approved increase in annual operating revenues

$ 4,200

Originally filed increase in annual operating revenue

$ 10,600

$ 9,500

Amended filed increase in annual operating revenue

$ 8,100

5,000

Base rate amount

$ 208,600

$ 219,000

Return on equity

9.75%

9.75%

Projected annual revenue

$ 100

New Jersey Board of Public Utilities [Member] | TESI [Member]

Regulatory Liabilities [Line Items]

Approved increase in annual operating revenues

$ 100

New Jersey Board of Public Utilities [Member] | Pinelands Water and Pinelands Wastewater [Member]

Regulatory Liabilities [Line Items]

Approved increase in annual operating revenues

$ 200

Originally filed increase in annual operating revenue

$ 300

Approved increase in annual operating revenue (percentage)

50.00%

Delaware Public Service Commission [Member] | Tidewater [Member]

Regulatory Liabilities [Line Items]

Originally filed increase in annual operating revenue

$ 3,900

Approved increase in annual operating revenue (percentage)

6.50%

Amended filed increase in annual operating revenue

$ 2,500

$ 800

Refund of previously deferred revenues

$ 400

Delaware Public Service Commission [Member] | TESI [Member]

Regulatory Liabilities [Line Items]

Approved increase in annual operating revenues

$ 200

Approved increase in annual operating revenue (percentage)

33.50%

Number of customers | N

600

Purchase of the wastewater utility assets

$ 400

Delaware Public Service Commission [Member] | Southern Shores [Member]

Regulatory Liabilities [Line Items]

Originally filed increase in annual operating revenue

$ 100

Rate and Regulatory Matters (Sc

Rate and Regulatory Matters (Schedule of Regulatory Assets) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Regulatory Assets [Line Items]
Regulatory Assets	$ 58,552	$ 66,216
Retirement Benefits [Member]
Regulatory Assets [Line Items]
Regulatory Assets	$ 39,378	47,868
Remaining recovery period	Various
Income Taxes [Member]
Regulatory Assets [Line Items]
Regulatory Assets	$ 15,541	17,195
Remaining recovery period	Various
Rate Cases, Tank Painting, and Other [Member]
Regulatory Assets [Line Items]
Regulatory Assets	$ 3,633	$ 1,153
Remaining recovery period	2-9 years

Income Taxes (Schedule of Incom

Income Taxes (Schedule of Income Tax Expense Reconciliation) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Taxes [Abstract]
Income Tax at Statutory Rate	$ 10,703	$ 9,786	$ 8,638
Tax Effect of:
Utility Plant Related	(920)	(572)	(527)
State Income Taxes - Net	745	711	546
Employee Benefits	7	(6)	(46)
Other	16	18	10
Income Taxes	$ 10,551	$ 9,937	$ 8,621

Income Taxes (Schedule of Inc35

Income Taxes (Schedule of Income Tax Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Current:
Federal	$ (15,203)	$ 5,920	$ 5,018
State	1,153	887	688
Deferred:
Federal	24,686	3,018	2,855
State	(6)	191	139
Investment Tax Credits	(79)	(79)	(79)
Total Income Tax Expense	$ 10,551	$ 9,937	$ 8,621

Income Taxes (Schedule of Net D

Income Taxes (Schedule of Net Deferred Tax Liability) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Income Taxes [Abstract]
Utility Plant Related	$ 63,281	$ 43,996
Customer Advances	(3,510)	(3,570)
Employee Benefits	5,796	7,223
Investment Tax Credits (ITC)	832	$ 910
Net Operating Loss Carryforwards	2,311
Other	(176)	$ (343)
Total Deferred Tax Liability and ITC	$ 68,534	$ 48,216

Income Taxes (Narrative) (Detai

Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Operating Loss Carryforwards [Line Items]
Decrease in accrued taxes	$ 178	$ 816	$ (1,134)
Tax Year 2014 [Member]
Operating Loss Carryforwards [Line Items]
Net reduction in taxes due to the federal government	17,600
Reserve against tangible property deductions	2,300
Operating loss carry-forward	7,800
Income tax refund receivable	10,300
Increase in regulatory assets	1,500
Decrease in accrued taxes	5,000
Increase in accumulated deferred taxes	$ 16,800

Commitments and Contingent Li38

Commitments and Contingent Liabilities (Narrative) (Details) gal in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2015USD ($)gal	Dec. 31, 2014USD ($)
Commitment And Contingencies [Line Items]
Period of wastewater agreement	20 years
Term of water and wastewater system agreement	USA-PA operates the City of Perth Amboy, NJ's water and wastewater systems under a 20-year agreement, which expires in 2018. In connection with the agreement with Perth Amboy, USA-PA entered into a 20-year subcontract with a wastewater operating company
Guarant liabilty for AWM's performance	$ 0.2	$ 0.3
Budgeted construction cost for construction program, 2016	47.3
Budgeted construction cost for construction program, 2017	45.4
Budgeted construction cost for construction program, 2018	$ 67
NJ Water Supply Authority [Member]
Commitment And Contingencies [Line Items]
Commitment of purchase of untreated water	Middlesex has an agreement with the NJWSA for the purchase of untreated water through November 30, 2023, which provides for an average purchase of 27 million gallons a day (mgd). Pricing is set annually by the NJWSA through a public rate making process.
Purchase commitment expiration date of contract	Nov. 30, 2023
Water purchase per commitment | gal	27
Regulated Water Authority [Member]
Commitment And Contingencies [Line Items]
Minimum treated water purchase commitment	Middlesex also has an agreement with a non-affiliated regulated water utility for the purchase of treated water. This agreement, which expires February 27, 2016, provides for the minimum purchase of 3 mgd of treated water with provisions for additional purchases.
Purchase commitment expiration date of contract	Feb. 27, 2021
Water purchase per commitment | gal	3
City of Dover [Member]
Commitment And Contingencies [Line Items]
Water purchase per commitment | gal	15

Commitments and Contingent Li39

Commitments and Contingent Liabilities (Schedule of Purchased Water Costs) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Purchased Water
Untreated	$ 3.1	$ 3.1	$ 3.2
Treated	2.5	2.4	2.4
Total Costs	$ 5.6	$ 5.5	$ 5.6

Short Term Borrowings (Details)

Short Term Borrowings (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Lines Of Credit Facility
Established Lines at Year-End	$ 60	$ 60
Maximum Amount Outstanding	19	33.5
Average Outstanding	15.3	27.4
Notes Payable at Year-End	$ 3	$ 19
Weighted Average Interest Rate	1.19%	1.41%
Weighted Average Interest Rate at Year-End	1.41%	1.17%

Capitalization (Narrative) (Det

Capitalization (Narrative) (Details) - USD ($)	1 Months Ended					12 Months Ended
	Feb. 28, 2015	Dec. 31, 2014	May. 31, 2014	Aug. 31, 2013	May. 31, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Oct. 31, 2015	Jul. 31, 2015	May. 31, 2015
Schedule of Capitalization [Line Items]
Shares authorized		40,000,000				40,000,000	40,000,000
Authorized shares under plan						300,000
Issuance of shares under the DRP						$ 1,462,000	$ 1,493,000	$ 1,653,000
Additional Shares Authorized By SEC To Be Issued										700,000
Maximum number of shares authorized for grant						100,000
Preferred Stock, Shares Authorized		126,000				126,000	126,000
Preferred Stock, Shares Outstanding		24,000				24,000	24,000
Proceeds from long-term debt borrowing						$ 7,000,000	$ 12,246,000	4,045,000
Long-term debt		$ 140,029,000				$ 140,279,000	$ 140,029,000
Weighted average interest rate		3.99%				3.87%	3.99%
Deobligated principal payments						$ 466,000		$ 64,000
Other long term debt		$ 50,800,000				54,700,000	$ 50,800,000
Customer advances		21,978,000				$ 20,461,000	$ 21,978,000
Dividend Reinvestment and Common Stock Purchase Plan [Member]
Schedule of Capitalization [Line Items]
Shares authorized						3,000,000
Dividend Reinvestment & Common Stock Purchase Plan, cumulative shares						2,300,000
Outside Director Stock Compensation Plan [Member]
Schedule of Capitalization [Line Items]
Authorized shares under plan						72,120
Common stock granted and issued under plan						4,795	5,082	5,432
Maximum number of shares authorized for grant						100,000
Preferred stock dividends in arrears						$ 0
Convertible Preferred Stock $7.00 Series [Member]
Schedule of Capitalization [Line Items]
Shares issued upon conversion						12
Convertible preferred stock converted, shares						4,293
Convertible preferred stock converted, value						$ 500,000
Stock issued upon conversion of convertible preferred stock (shares)						51,516
Percentage of stock that may be redeemed in a given calander year						10.00%
Convertible Preferred Stock $8.00 Series [Member]
Schedule of Capitalization [Line Items]
Shares issued upon conversion						13.714
Convertible preferred stock converted, shares				4,000
Convertible preferred stock converted, value				$ 500,000
Stock issued upon conversion of convertible preferred stock (shares)				54,856
Tidewater [Member]
Schedule of Capitalization [Line Items]
Loan amount	$ 4,000,000								$ 15,000,000
Proceeds from long-term debt borrowing	7,000,000	8,000,000
Long-term debt	$ 11,000,000
Interest reate	4.45%
Maturity date						Apr. 1, 2040
New Jersey Environmental Infrastructure Trust [Member]
Schedule of Capitalization [Line Items]
Proceeds from long-term debt borrowing			$ 3,800,000
Long-term debt						$ 30,200,000
Deobligated principal payments						500,000		$ 100,000
First Mortgage Bonds - Series TT [Member] | New Jersey Environmental Infrastructure Trust [Member]
Schedule of Capitalization [Line Items]
Interest reate					0.00%
Maturity date					Aug. 1, 2032
First Mortgage Bonds - Series UU [Member] | New Jersey Environmental Infrastructure Trust [Member]
Schedule of Capitalization [Line Items]
Maturity date					Aug. 1, 2032
First Mortgage Bonds - Series VV [Member] | New Jersey Environmental Infrastructure Trust [Member]
Schedule of Capitalization [Line Items]
Issuance of series bonds			$ 2,800,000
Interest reate											0.00%
Maturity date			Aug. 1, 2033
First Mortgage Bonds - Series WW [Member] | New Jersey Environmental Infrastructure Trust [Member]
Schedule of Capitalization [Line Items]
Issuance of series bonds			$ 900,000
Interest rate, minimum			3.00%
Interest rate, maximum			5.00%
Maturity date			Aug. 1, 2033
Delaware State Revolving Fund [Member]
Schedule of Capitalization [Line Items]
Long-term debt						$ 9,300,000
Delaware State Revolving Fund [Member] | Tidewater [Member]
Schedule of Capitalization [Line Items]
Proceeds from long-term debt borrowing							$ 600,000
Long-term debt		$ 1,100,000					$ 1,100,000
Interest reate		3.45%					3.45%
Maturity date						Aug. 1, 2031
New Jersey Economic Development Authority [Member]
Schedule of Capitalization [Line Items]
Long-term debt						$ 55,400,000

Capitalization (Schedule of Mat

Capitalization (Schedule of Maturities of Long-term Debt) (Details) $ in Millions	Dec. 31, 2015USD ($)
2,016	$ 5.7
2,017	6
2,018	6.4
2,019	6.4
2,020	$ 6.3

Capitalization (Schedule of Ear

Capitalization (Schedule of Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Basic:
Net Income	$ 4,560	$ 6,743	$ 5,089	$ 3,636	$ 3,790	$ 6,758	$ 4,728	$ 3,169	$ 20,028	$ 18,445	$ 16,633
Preferred Dividend									(144)	(151)	(190)
Earnings Applicable to Common Stock									$ 19,884	$ 18,294	$ 16,443
Weighted-average number of basic shares outstanding, shares									16,175	16,052	15,868
Basic EPS	$ 0.29	$ 0.41	$ 0.31	$ 0.22	$ 0.23	$ 0.42	$ 0.29	$ 0.20	$ 1.23	$ 1.14	$ 1.04
Diluted:
$7.00 Series Preferred Dividend									$ 67	$ 74	$ 97
$8.00 Series Preferred Dividend									24	24	40
Adjusted Earnings Applicable to Common Stock									$ 19,975	$ 18,392	$ 16,580
Incremental common shares attributable to $7.00 series preferred shares, shares									115	133	166
Incremental common shares attributable to $8.00 series preferred shares, shares									41	41	76
Weighted-average diluted shares outstanding, shares									16,331	16,226	16,110
Diluted EPS	$ 0.28	$ 0.41	$ 0.31	$ 0.22	$ 0.22	$ 0.42	$ 0.29	$ 0.20	$ 1.22	$ 1.13	$ 1.03

Capitalization (Schedule of Car

Capitalization (Schedule of Carrying Amount and Fair Value of Bonds) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Carrying amount [Member]
Bonds	$ 85,143	$ 88,628
State Revolving Notes	457	540
Fair value [Member]
Bonds	87,972	90,115
State Revolving Notes	$ 459	$ 542

Employee Benefit Plans (Narrati

Employee Benefit Plans (Narrative) (Details) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2015USD ($)Nshares	Dec. 31, 2014USD ($)	Dec. 31, 2013USD ($)
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation	$ 62.3	$ 61.9
Increase (decrease) in annual rate per capita cost of covered healthcare benefits, next year	9.00%
Increase (decrease) in annual rate per capita cost of covered healthcare benefits, 2017-2019	1.00%
Increase (decrease) in annual rate per capita cost of covered healthcare benefits, 2020-2021	0.50%
Annual rate of increase in the per capita cost of covered healthcare benefits	5.00%
Description of 401(k)	The Company has a 401(k) defined contribution plan, which covers substantially all employees with more than 1,000 hours of service. Under the terms of the Plan, the Company matches 100% of a participant’s contributions, which do not exceed 1% of a participant’s compensation, plus 50% of a participant’s contributions exceeding 1%, but not more than 6%. The Company’s matching contributions were $0.6 million, $0.6 million and $0.5 million for the years ended December 31, 2015, 2014 and 2013, respectively. For those employees hired after March 31, 2007 and still actively employed on December 31, 2015, the Company approved and will fund discretionary contribution of $0.4 million, which was based on 5.0% of eligible 2014 compensation. For the years ended December 31, 2013 and 2012, the Company made discretionary contributions of $0.3 million and $0.3 million, respectively, for those qualifying employees.
Number of hours required to participate in contribution plan | N	1,000
Percent of participants contributions matched by company, below one percent of participants compensation	100.00%
Percent of participants contributions matched by company, above one percent of participants compensation	50.00%
Threshold percentage of participants compensation at which matching decreases	1.00%
Matching contributions, percent	6.00%
Matching contributions	$ 0.6	0.5	$ 0.5
Discretionary contributions, percent	5.00%
Discretionary contributions	$ 0.4	0.3	0.3
Escrow account maintained for 2008 restricted stock plan | shares	0.1
Maximum number of shares authorized for grant | shares	0.3
Number of shares authorized for grant, unissued | shares	0.1
Fair value of vested restricted shares	$ 0.3	$ 0.5	$ 0.5
Pension Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Allocation of plan assets	100.00%	100.00%
Benfit plan, Cash contributions	$ 3.3
Expected cash contributions next fiscal year	$ 3.3
Other Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Allocation of plan assets	100.00%	100.00%
Benfit plan, Cash contributions	$ 1.7
Expected cash contributions next fiscal year	$ 1.5
Equity Securities [Member] | Pension Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Allocation of plan assets	59.10%	60.70%
Equity Securities [Member] | Other Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Allocation of plan assets	50.00%	49.50%
Equity Securities [Member] | Middlesex [Member]
Defined Benefit Plan Disclosure [Line Items]
Allocation of plan assets	2.00%	1.80%
Common stock in plan, value	$ 1	$ 0.9

Employee Benefit Plans (Schedul

Employee Benefit Plans (Schedule of Change in Projected Benefit Obligation) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Pension Benefit Plan [Member]
Change in Projected Benefit Obligation:
Beginning Balance	$ 75,043	$ 56,041
Service Cost	2,558	1,894	$ 2,300
Interest Cost	2,894	2,682	2,468
Actuarial (Gain) Loss	(5,915)	16,429
Benefits Paid	(2,038)	(2,003)
Ending Balance	72,542	75,043	56,041
Other Benefits Plan [Member]
Change in Projected Benefit Obligation:
Beginning Balance	49,578	37,212
Service Cost	1,373	1,032	1,338
Interest Cost	1,921	1,792	1,594
Actuarial (Gain) Loss	(6,062)	10,092
Benefits Paid	(561)	(550)
Ending Balance	$ 46,249	$ 49,578	$ 37,212

Employee Benefit Plans (Sched47

Employee Benefit Plans (Schedule of Change in Fair Value of Plan Assets) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Pension Benefit Plan [Member]
Change in Fair Value of Plan Assets:
Beginning Balance	$ 51,623	$ 46,443
Actual Return on Plan Assets	11	3,603
Employer Contributions	3,335	3,580
Benefits Paid	(2,038)	(2,003)
Ending Balance	52,931	51,623
Funded Status	(19,611)	(23,420)
Other Benefits Plan [Member]
Change in Fair Value of Plan Assets:
Beginning Balance	27,535	25,145
Actual Return on Plan Assets	350	1,243
Employer Contributions	1,694	1,697
Benefits Paid	(561)	(550)
Ending Balance	29,018	27,535
Funded Status	$ (17,231)	$ (22,043)

Employee Benefit Plans (Sched48

Employee Benefit Plans (Schedule of Employee Benefit Plans Recognized in Balance Sheet) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items]
Noncurrent Liability	$ 36,515	$ 45,135
Pension Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Current Liability	327	328
Noncurrent Liability	19,284	23,092
Net Liability Recognized	$ 19,611	$ 23,420
Other Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Current Liability
Noncurrent Liability	$ 17,231	$ 22,043
Net Liability Recognized	$ 17,231	$ 22,043

Employee Benefit Plans (Sched49

Employee Benefit Plans (Schedule of Periodic Costs For Employee Retirement Benefit Plans) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Pension Benefit Plan [Member]
Periodic costs for employee retirement benefit plans
Service Cost	$ 2,558	$ 1,894	$ 2,300
Interest Cost	2,894	2,682	2,468
Expected Return on Plan Assets	(3,919)	(3,534)	(2,894)
Amortization of Net Actuarial Loss	$ 1,645	416	1,632
Amortization of Prior Service Cost/(Credit)		2	10
Net Periodic Benefit Cost	$ 3,178	1,460	3,516
Other Benefits Plan [Member]
Periodic costs for employee retirement benefit plans
Service Cost	1,373	1,032	1,338
Interest Cost	1,921	1,792	1,594
Expected Return on Plan Assets	(2,107)	(1,937)	(1,622)
Amortization of Net Actuarial Loss	2,261	1,413	2,066
Amortization of Prior Service Cost/(Credit)	(1,728)	(1,728)	(1,728)
Net Periodic Benefit Cost	$ 1,720	$ 572	$ 1,648

Employee Benefit Plans (Sched50

Employee Benefit Plans (Schedule of Amounts Expected to be Amortized from Regulatory Assets to Net Periodic Benefit Cost) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2015USD ($)
Pension Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Actuarial Loss	$ 1,426
Prior Service Credit
Other Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Actuarial Loss	$ 1,773
Prior Service Credit	$ (1,728)

Employee Benefit Plans (Sched51

Employee Benefit Plans (Schedule of Discount and Compensation Rates) (Details)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Pension Benefit Plan [Member]
Weighted Average Assumptions:
Expected Return on Plan Assets	7.50%	7.50%	7.50%
Discount Rate for:
Benefit Obligation	4.26%	3.91%	4.87%
Benefit Cost	3.91%	4.87%	3.99%
Compensation Increase for:
Benefit Obligation	3.00%	3.00%	3.00%
Benefit Cost	3.00%	3.00%	3.00%
Other Benefits Plan [Member]
Weighted Average Assumptions:
Expected Return on Plan Assets	7.50%	7.50%	7.50%
Discount Rate for:
Benefit Obligation	4.26%	3.91%	4.87%
Benefit Cost	3.91%	4.87%	3.99%
Compensation Increase for:
Benefit Obligation	3.00%	3.00%	3.00%
Benefit Cost	3.00%	3.00%	3.00%

Employee Benefit Plans (Sched52

Employee Benefit Plans (Schedule of Effect of One-percentage Point Change in Assumed Health Care Cost Trend Rates) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2015USD ($)
Pension Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Effect on Current Year's Service and Interest Cost - Increase	$ 781
Effect on Projected Benefit Obligation - Increase	8,267
Other Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Effect on Current Year's Service and Interest Cost - Decrease	(589)
Effect on Projected Benefit Obligation - Decrease	$ (6,482)

Employee Benefit Plans (Sched53

Employee Benefit Plans (Schedule of Expected Benefit Payments) (Details) $ in Thousands	Dec. 31, 2015USD ($)
Pension Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
2,016	$ 2,123
2,017	2,342
2,018	2,393
2,019	2,411
2,020	2,795
2021-2025	19,641
Totals	31,705
Other Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
2,016	876
2,017	1,119
2,018	1,315
2,019	1,512
2,020	1,645
2021-2025	10,473
Totals	$ 16,940

Employee Benefit Plans (Sched54

Employee Benefit Plans (Schedule of Allocation of Plan Assets) (Details)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Pension Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Allocation of plan assets	100.00%	100.00%
Other Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Allocation of plan assets	100.00%	100.00%
Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target plan allocations	55.00%	43.00%
Equity Securities [Member] | Pension Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Allocation of plan assets	59.10%	60.70%
Equity Securities [Member] | Other Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Allocation of plan assets	50.00%	49.50%
Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target plan allocations	38.00%	50.00%
Debt Securities [Member] | Pension Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Allocation of plan assets	37.80%	35.80%
Debt Securities [Member] | Other Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Allocation of plan assets	47.40%	47.50%
Cash [Member]
Defined Benefit Plan Disclosure [Line Items]
Target plan allocations	2.00%	2.00%
Cash [Member] | Pension Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Allocation of plan assets	1.30%	1.20%
Cash [Member] | Other Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Allocation of plan assets	2.40%	2.80%
Commodities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target plan allocations	5.00%	5.00%
Commodities [Member] | Pension Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Allocation of plan assets	1.80%	2.30%
Commodities [Member] | Other Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Allocation of plan assets	0.20%	0.20%

Employee Benefit Plans (Sched55

Employee Benefit Plans (Schedule of Fair Value of Pension Plan Assets) (Details) - Pension Benefit Plan [Member] - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 52,931	$ 51,623	$ 46,443
Mutual Funds - Small Cap Core [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	251	261
Mutual Funds - Small Cap Growth [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	217
Mutual Funds - Small Cap Value [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,107	876
Mutual Funds - Mid Cap Core [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	998	1,013
Mutual Funds - Mid Cap Value [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	606	627
Mutual Funds - Large Cap Blend [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	955	1,187
Mutual Funds - Large Cap Core [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	15,432	15,321
Mutual Funds - Foreign Large Core [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	284	989
Mutual Funds - Foreign Large Growth [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		449
Mutual Funds - Foreign Large Blend [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	3,775	2,566
Mutual Funds - Diversified Emerging Markets [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		737
Mutual Funds - Intermediate Term Bond [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	8,707	9,824
Mutual Funds - World Bond [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	11,291	8,668
Money Market Funds - Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	652	513
Common Equity Securities - Non-Financial Services [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	202	280
Common Equity Securities - Financial Services [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,704	1,656
Common Equity Securities - Utilities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,754	1,504
Common Equity Securities - Consumer Growth [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,191	1,123
Common Equity Securities - Consumer Staples [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	553	459
Common Equity Securities - Consumer Cyclicals [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	946	922
Common Equity Securities - Industrial Resources [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	284	155
Common Equity Securities - Capital Equipment [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	527	453
Common Equity Securities - Technology [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,118	1,328
Common Equity Securities - Energy [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	377	712
Fair Value, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	52,931	51,237
Fair Value, Level 1 [Member] | Mutual Funds - Small Cap Core [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	251	261
Fair Value, Level 1 [Member] | Mutual Funds - Small Cap Growth [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	217
Fair Value, Level 1 [Member] | Mutual Funds - Small Cap Value [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,107	876
Fair Value, Level 1 [Member] | Mutual Funds - Mid Cap Core [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	998	1,013
Fair Value, Level 1 [Member] | Mutual Funds - Mid Cap Value [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	606	627
Fair Value, Level 1 [Member] | Mutual Funds - Large Cap Blend [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	955	1,187
Fair Value, Level 1 [Member] | Mutual Funds - Large Cap Core [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	15,432	15,321
Fair Value, Level 1 [Member] | Mutual Funds - Foreign Large Core [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	284	989
Fair Value, Level 1 [Member] | Mutual Funds - Foreign Large Growth [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		449
Fair Value, Level 1 [Member] | Mutual Funds - Foreign Large Blend [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	3,775	2,566
Fair Value, Level 1 [Member] | Mutual Funds - Diversified Emerging Markets [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		737
Fair Value, Level 1 [Member] | Mutual Funds - Intermediate Term Bond [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	8,707	9,824
Fair Value, Level 1 [Member] | Mutual Funds - World Bond [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	11,291	8,668
Fair Value, Level 1 [Member] | Money Market Funds - Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	652	127
Fair Value, Level 1 [Member] | Common Equity Securities - Non-Financial Services [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	202	280
Fair Value, Level 1 [Member] | Common Equity Securities - Financial Services [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,704	1,656
Fair Value, Level 1 [Member] | Common Equity Securities - Utilities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,754	1,504
Fair Value, Level 1 [Member] | Common Equity Securities - Consumer Growth [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,191	1,123
Fair Value, Level 1 [Member] | Common Equity Securities - Consumer Staples [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	553	459
Fair Value, Level 1 [Member] | Common Equity Securities - Consumer Cyclicals [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	946	922
Fair Value, Level 1 [Member] | Common Equity Securities - Industrial Resources [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	284	155
Fair Value, Level 1 [Member] | Common Equity Securities - Capital Equipment [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	527	453
Fair Value, Level 1 [Member] | Common Equity Securities - Technology [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,118	1,328
Fair Value, Level 1 [Member] | Common Equity Securities - Energy [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 377	712
Fair Value, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		$ 386
Fair Value, Level 2 [Member] | Mutual Funds - Small Cap Core [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 2 [Member] | Mutual Funds - Small Cap Growth [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 2 [Member] | Mutual Funds - Small Cap Value [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 2 [Member] | Mutual Funds - Mid Cap Core [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 2 [Member] | Mutual Funds - Mid Cap Value [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 2 [Member] | Mutual Funds - Large Cap Blend [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 2 [Member] | Mutual Funds - Large Cap Core [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 2 [Member] | Mutual Funds - Foreign Large Core [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 2 [Member] | Mutual Funds - Foreign Large Blend [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 2 [Member] | Mutual Funds - Diversified Emerging Markets [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 2 [Member] | Mutual Funds - Intermediate Term Bond [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 2 [Member] | Mutual Funds - World Bond [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 2 [Member] | Money Market Funds - Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		$ 386
Fair Value, Level 2 [Member] | Common Equity Securities - Non-Financial Services [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 2 [Member] | Common Equity Securities - Financial Services [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 2 [Member] | Common Equity Securities - Utilities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 2 [Member] | Common Equity Securities - Consumer Growth [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 2 [Member] | Common Equity Securities - Consumer Staples [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 2 [Member] | Common Equity Securities - Consumer Cyclicals [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 2 [Member] | Common Equity Securities - Industrial Resources [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 2 [Member] | Common Equity Securities - Capital Equipment [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 2 [Member] | Common Equity Securities - Technology [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 2 [Member] | Common Equity Securities - Energy [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 3 [Member] | Mutual Funds - Small Cap Core [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 3 [Member] | Mutual Funds - Small Cap Growth [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 3 [Member] | Mutual Funds - Small Cap Value [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 3 [Member] | Mutual Funds - Mid Cap Core [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 3 [Member] | Mutual Funds - Mid Cap Value [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 3 [Member] | Mutual Funds - Large Cap Blend [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 3 [Member] | Mutual Funds - Large Cap Core [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 3 [Member] | Mutual Funds - Foreign Large Core [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 3 [Member] | Mutual Funds - Foreign Large Blend [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 3 [Member] | Mutual Funds - Diversified Emerging Markets [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 3 [Member] | Mutual Funds - Intermediate Term Bond [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 3 [Member] | Mutual Funds - World Bond [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 3 [Member] | Money Market Funds - Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 3 [Member] | Common Equity Securities - Non-Financial Services [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 3 [Member] | Common Equity Securities - Financial Services [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 3 [Member] | Common Equity Securities - Utilities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 3 [Member] | Common Equity Securities - Consumer Growth [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 3 [Member] | Common Equity Securities - Consumer Staples [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 3 [Member] | Common Equity Securities - Consumer Cyclicals [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 3 [Member] | Common Equity Securities - Industrial Resources [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 3 [Member] | Common Equity Securities - Capital Equipment [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 3 [Member] | Common Equity Securities - Technology [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 3 [Member] | Common Equity Securities - Energy [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets

Employee Benefit Plans (Sched56

Employee Benefit Plans (Schedule of Fair Value of Other Benefits Plan Assets) (Details) - Other Benefits Plan [Member] - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 29,018	$ 27,535	$ 25,145
Mutual Funds - Small Cap Core [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	594	491
Mutual Funds - Small Cap Growth [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	40	82
Mutual Funds - Small Cap Value [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	101
Mutual Funds - Mid Cap Core [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	295	292
Mutual Funds - Mid Cap Growth [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	135	121
Mutual Funds - Mid Cap Value [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	762	768
Mutual Funds - Large Cap Core [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	10,912	10,516
Mutual Funds - Foreign Small Mid Growth [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	116	119
Mutual Funds - Foreign Large Blend [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	413
Mutual Funds - Foreign Large Core [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	666	735
Mutual Funds - Foreign Large Growth [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	138
Mutual Funds - Foreign Large Value [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		113
Mutual Funds - Diversified Emerging Markets [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	339	371
Mutual Funds - Real Estate Index [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	61	62
Money Market Funds - Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	688	782
Preferred Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	224	221
Agency/US/State/Municipal Debt [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	13,534	12,862
Fair Value, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	15,484	14,341
Fair Value, Level 1 [Member] | Mutual Funds - Small Cap Core [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	594	491
Fair Value, Level 1 [Member] | Mutual Funds - Small Cap Growth [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	40	82
Fair Value, Level 1 [Member] | Mutual Funds - Small Cap Value [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	101
Fair Value, Level 1 [Member] | Mutual Funds - Mid Cap Core [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	295	292
Fair Value, Level 1 [Member] | Mutual Funds - Mid Cap Growth [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	135	121
Fair Value, Level 1 [Member] | Mutual Funds - Mid Cap Value [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	762	768
Fair Value, Level 1 [Member] | Mutual Funds - Large Cap Core [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	10,912	10,516
Fair Value, Level 1 [Member] | Mutual Funds - Foreign Small Mid Growth [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	116	119
Fair Value, Level 1 [Member] | Mutual Funds - Foreign Large Blend [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	413
Fair Value, Level 1 [Member] | Mutual Funds - Foreign Large Core [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	666	735
Fair Value, Level 1 [Member] | Mutual Funds - Foreign Large Growth [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	138
Fair Value, Level 1 [Member] | Mutual Funds - Foreign Large Value [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		113
Fair Value, Level 1 [Member] | Mutual Funds - Diversified Emerging Markets [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	339	371
Fair Value, Level 1 [Member] | Mutual Funds - Real Estate Index [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	61	62
Fair Value, Level 1 [Member] | Money Market Funds - Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	688	450
Fair Value, Level 1 [Member] | Preferred Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 224	$ 221
Fair Value, Level 1 [Member] | Agency/US/State/Municipal Debt [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 13,534	$ 13,194
Fair Value, Level 2 [Member] | Mutual Funds - Small Cap Core [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 2 [Member] | Mutual Funds - Small Cap Growth [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 2 [Member] | Mutual Funds - Small Cap Value [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 2 [Member] | Mutual Funds - Mid Cap Core [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 2 [Member] | Mutual Funds - Mid Cap Growth [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 2 [Member] | Mutual Funds - Mid Cap Value [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 2 [Member] | Mutual Funds - Large Cap Core [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 2 [Member] | Mutual Funds - Foreign Small Mid Growth [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 2 [Member] | Mutual Funds - Foreign Large Blend [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 2 [Member] | Mutual Funds - Foreign Large Core [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 2 [Member] | Mutual Funds - Foreign Large Growth [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 2 [Member] | Mutual Funds - Foreign Large Value [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 2 [Member] | Mutual Funds - Diversified Emerging Markets [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 2 [Member] | Mutual Funds - Real Estate Index [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 2 [Member] | Money Market Funds - Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		$ 332
Fair Value, Level 2 [Member] | Preferred Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 2 [Member] | Agency/US/State/Municipal Debt [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 13,534	$ 12,862
Fair Value, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 3 [Member] | Mutual Funds - Small Cap Core [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 3 [Member] | Mutual Funds - Small Cap Growth [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 3 [Member] | Mutual Funds - Small Cap Value [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 3 [Member] | Mutual Funds - Mid Cap Core [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 3 [Member] | Mutual Funds - Mid Cap Growth [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 3 [Member] | Mutual Funds - Mid Cap Value [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 3 [Member] | Mutual Funds - Large Cap Core [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 3 [Member] | Mutual Funds - Foreign Small Mid Growth [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 3 [Member] | Mutual Funds - Foreign Large Blend [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 3 [Member] | Mutual Funds - Foreign Large Core [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 3 [Member] | Mutual Funds - Foreign Large Growth [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 3 [Member] | Mutual Funds - Foreign Large Value [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 3 [Member] | Mutual Funds - Diversified Emerging Markets [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 3 [Member] | Mutual Funds - Real Estate Index [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 3 [Member] | Money Market Funds - Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 3 [Member] | Preferred Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 3 [Member] | Agency/US/State/Municipal Debt [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets

Employee Benefit Plans (Sched57

Employee Benefit Plans (Schedule of Restricted Stock Plan) (Details) - 2008 Restricted Stock Plan [Member] - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Shares
Balance	127	117	114
Granted	33	33	28
Vested	(12)	(22)	(24)
Forfeited		(1)	(1)
Amortization of Compensation Expense
Balance	148	127	117
Unearned compensation
Balance	$ 1,483	$ 1,216	$ 1,039
Granted	$ 741	$ 711	$ 589
Vested
Forfeited		$ (10)	$ (12)
Amortization of Compensation Expense	$ (528)	(434)	(400)
Balance	$ 1,696	$ 1,483	$ 1,216
Weighted Average Grant Price
Granted	$ 22.65	$ 21.46	$ 21.20

Business Segment Data (Details)

Business Segment Data (Details) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015USD ($)	Sep. 30, 2015USD ($)	Jun. 30, 2015USD ($)	Mar. 31, 2015USD ($)	Dec. 31, 2014USD ($)	Sep. 30, 2014USD ($)	Jun. 30, 2014USD ($)	Mar. 31, 2014USD ($)	Dec. 31, 2015USD ($)N	Dec. 31, 2014USD ($)	Dec. 31, 2013USD ($)
Segment Reporting Information [Line Items]
Number of Reportable Segments | N									2
Revenues	$ 30,925	$ 34,654	$ 31,666	$ 28,780	$ 28,107	$ 32,669	$ 29,190	$ 27,173	$ 126,025	$ 117,139	$ 114,846
Operating Income	8,460	11,460	9,235	6,685	8,058	11,620	8,747	5,967	35,840	34,392	30,970
Depreciation									12,051	11,444	10,988
Other Income (Expense), Net									293	(403)	91
Interest Expense									5,554	5,607	5,807
Income Taxes									10,551	9,937	8,621
Net Income	4,560	$ 6,743	$ 5,089	$ 3,636	3,790	$ 6,758	$ 4,728	$ 3,169	20,028	18,445	16,633
Capital Expenditures									25,773	22,596	20,080
Assets	584,722				575,772				584,722	575,772
Inter-segment Elimination [Member]
Segment Reporting Information [Line Items]
Revenues									(460)	(560)	(527)
Other Income (Expense), Net									(346)	(485)	(723)
Interest Expense									(89)	(91)	(97)
Assets	(6,374)				(6,334)				(6,374)	(6,334)
Regulated [Member]
Segment Reporting Information [Line Items]
Revenues									111,247	103,556	100,910
Operating Income									33,603	32,000	28,744
Depreciation									11,874	11,262	10,807
Other Income (Expense), Net									619	157	828
Interest Expense									5,554	5,607	5,807
Income Taxes									9,522	8,907	7,635
Net Income									18,889	17,249	15,504
Capital Expenditures									25,706	22,498	19,894
Assets	584,660				574,854				584,660	574,854
Non - Regulated [Member]
Segment Reporting Information [Line Items]
Revenues									15,238	14,143	14,463
Operating Income									2,237	2,392	2,226
Depreciation									177	182	181
Other Income (Expense), Net									20	(75)	(14)
Interest Expense									89	91	97
Income Taxes									1,029	1,030	986
Net Income									1,139	1,196	1,129
Capital Expenditures									67	98	$ 186
Assets	$ 6,436				$ 7,252				$ 6,436	$ 7,252

Quarterly Operating Results -59

Quarterly Operating Results - Unaudited (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Quarterly Operating Results - Unaudited [Abstract]
Operating Revenues	$ 30,925	$ 34,654	$ 31,666	$ 28,780	$ 28,107	$ 32,669	$ 29,190	$ 27,173	$ 126,025	$ 117,139	$ 114,846
Operating Income	8,460	11,460	9,235	6,685	8,058	11,620	8,747	5,967	35,840	34,392	30,970
Net Income	$ 4,560	$ 6,743	$ 5,089	$ 3,636	$ 3,790	$ 6,758	$ 4,728	$ 3,169	$ 20,028	$ 18,445	$ 16,633
Basic Earnings per Share	$ 0.29	$ 0.41	$ 0.31	$ 0.22	$ 0.23	$ 0.42	$ 0.29	$ 0.20	$ 1.23	$ 1.14	$ 1.04
Diluted Earnings per Share	$ 0.28	$ 0.41	$ 0.31	$ 0.22	$ 0.22	$ 0.42	$ 0.29	$ 0.20	$ 1.22	$ 1.13	$ 1.03