Middlesex Water (MSEX) 10-K 25 Feb 22 2021 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2021	Feb. 25, 2022	Jun. 30, 2021
Cover [Abstract]
Entity Central Index Key	0000066004
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2021
Current Fiscal Year End Date	--12-31
Amendment Flag	false
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2021
Document Transition Report	false
Entity File Number	0-422
Entity Registrant Name	MIDDLESEX WATER COMPANY
Entity Incorporation State Country Code	NJ
Entity Tax Identification Number	22-1114430
Entity Address, Address Line One	485C Route 1 South
Entity Address, Address Line Two	Suite 400
Entity Address, City or Town	Iselin
Entity Address, State or Province	NJ
Entity Address, Postal Zip Code	08830
City Area Code	732
Local Phone Number	634-1500
Title of 12(b) Security	Common Stock, No Par Value
Trading Symbol	MSEX
Name of Exchange on which Security is Registered	NASDAQ
Entity a Well-known Seasoned Issuer	Yes
Entity a Voluntary Filer	No
Entity Reporting Status Current	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 1,392,996,885
Entity Common Stock, Shares Outstanding		17,535,572
Documents Incorporated By Reference Text Block	Proxy Statement to be filed in connection with the Registrant’s Annual Meeting of Stockholders to be held on May 23, 2022, which will be filed with the Securities and Exchange Commission within 120 days of the end of our 2021 fiscal year, is incorporated by reference into Part III of this Annual Report on Form 10-K to the extent described herein.
Auditor Name	Baker Tilly US, LLP
Auditor Location	Philadelphia, PA
Auditor Firm Id	23

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Statement [Abstract]
Operating Revenues	$ 143,141	$ 141,592	$ 134,598
Operating Expenses:
Operations and Maintenance	73,671	70,796	67,980
Depreciation	21,109	18,472	16,716
Other Taxes	15,150	14,904	14,382
Total Operating Expenses	109,930	104,172	99,078
Operating Income	33,211	37,420	35,520
Other Income (Expense):
Allowance for Funds Used During Construction	2,653	4,016	3,146
Other Income (Expense), net	3,305	363	(654)
Total Other Income, net	5,958	4,379	2,492
Interest Charges	8,114	7,493	7,264
Income before Income Taxes	31,055	34,306	30,748
Income Taxes	(5,488)	(4,119)	(3,140)
Net Income	36,543	38,425	33,888
Preferred Stock Dividend Requirements	120	120	132
Earnings Applicable to Common Stock	$ 36,423	$ 38,305	$ 33,756
Earnings per share of Common Stock:
Basic	$ 2.08	$ 2.19	$ 2.02
Diluted	$ 2.07	$ 2.18	$ 2.01
Average Number of Common Shares Outstanding :
Basic	17,492	17,459	16,685
Diluted	17,607	17,574	16,829

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
UTILITY PLANT:
Water Production	$ 247,286	$ 168,080
Transmission and Distribution	697,200	648,763
General	95,658	85,056
Construction Work in Progress	24,947	80,055
TOTAL	1,065,091	981,954
Less Accumulated Depreciation	199,723	185,356
UTILITY PLANT - NET	865,368	796,598
CURRENT ASSETS:
Cash and Cash Equivalents	3,533	4,491
Accounts Receivable, net of allowance for uncollectible accounts of $2,574 and $2,053, respectively	15,311	14,569
Unbilled Revenues	7,273	7,065
Materials and Supplies (at average cost)	5,358	5,112
Prepayments	2,880	2,886
TOTAL CURRENT ASSETS	34,355	34,123
Operating Lease Right of Use Asset	4,503	5,209
Preliminary Survey and Investigation Charges	3,540	5,192
Regulatory Assets	100,738	118,144
Restricted Cash		5,913
Non-utility Assets - Net	11,428	11,207
Other	83	84
TOTAL OTHER ASSETS	120,292	145,749
TOTAL ASSETS	1,020,015	976,470
CAPITALIZATION:
Common Stock, No Par Value	221,919	217,451
Retained Earnings	145,807	128,757
TOTAL COMMON EQUITY	367,726	346,208
Preferred Stock	2,084	2,084
Long-term Debt	306,520	273,244
TOTAL CAPITALIZATION	676,330	621,536
CURRENT LIABILITIES:
Current Portion of Long-term Debt	6,731	7,255
Notes Payable	13,000	2,000
Accounts Payable	21,125	30,443
Accrued Taxes	8,621	10,138
Accrued Interest	1,986	2,137
Unearned Revenues and Advanced Service Fees	1,330	1,255
Other	3,826	3,620
TOTAL CURRENT LIABILITIES	56,619	56,848
COMMITMENTS AND CONTINGENT LIABILITIES (Note 4)
OTHER LIABILITIES:
Customer Advances for Construction	23,529	23,404
Lease Obligations	4,367	5,042
Accumulated Deferred Income Taxes	69,500	61,297
Employee Benefit Plans	11,290	34,426
Regulatory Liabilities	49,431	60,792
Other	1,086	1,135
TOTAL OTHER LIABILITIES	159,203	186,096
CONTRIBUTIONS IN AID OF CONSTRUCTION	127,863	111,990
TOTAL CAPITALIZATION AND LIABILITIES	$ 1,020,015	$ 976,470

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Consolidated Balance Sheets
Allowance for uncollectible accounts	$ 2,574	$ 2,053

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	$ 36,543	$ 38,425	$ 33,888
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Depreciation and Amortization	26,799	20,838	17,232
Provision for Deferred Income Taxes	(10,989)	(13,490)	(11,719)
Equity Portion of Allowance for Funds Used During Construction (AFUDC)	(1,505)	(2,503)	(1,997)
Cash Surrender Value of Life Insurance	(136)	(391)	(252)
Stock Compensation Expense	1,338	1,096	637
Changes in Assets and Liabilities:
Accounts Receivable	(742)	(2,661)	(146)
Unbilled Revenues	(208)	118	110
Materials & Supplies	(246)	333	(34)
Prepayments	6	(519)	277
Accounts Payable	(9,318)	7,137	3,981
Accrued Taxes	(1,517)	2,503	(6,595)
Accrued Interest	(151)	106	742
Employee Benefit Plans	(2,645)	(1,377)	(1,112)
Unearned Revenue & Advanced Service Fees	75	44	175
Other Assets and Liabilities	(4,276)	3,696	866
NET CASH PROVIDED BY OPERATING ACTIVITIES	33,028	53,355	36,053
CASH FLOWS FROM INVESTING ACTIVITIES:
Utility Plant Expenditures, Including AFUDC of $1,148 in 2021, $1,513 in 2020 and $1,149 in 2019	(79,378)	(105,619)	(89,125)
NET CASH USED IN INVESTING ACTIVITIES	(79,378)	(105,619)	(89,125)
CASH FLOWS FROM FINANCING ACTIVITIES:
Redemption of Long-term Debt	(52,691)	(7,472)	(7,343)
Proceeds from Issuance of Long-term Debt	86,595	50,316	78,967
Proceeds from Premium Issuance of Long-term Debt			7,083
Net Short-term Bank Borrowings	11,000	(18,000)	(28,500)
Deferred Debt Issuance Expense	(994)	(148)	(769)
Common Stock Issuance Expense		(37)	(357)
Proceeds from Issuance of Common Stock	3,837	1,230	56,784
Payment of Common Dividends	(19,373)	(18,178)	(16,165)
Payment of Preferred Dividends	(120)	(120)	(132)
Construction Advances and Contributions-Net	11,225	8,578	4,342
NET CASH PROVIDED BY FINANCING ACTIVITIES	39,479	16,169	93,910
NET CHANGES IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH	(6,871)	(36,095)	40,838
CASH, CASH EQUIVALENTS AND RESTRICTED CASH AT BEGINNING OF PERIOD	10,404	46,499	5,661
CASH, CASH EQUIVALENTS AND RESTRICTED CASH AT END OF PERIOD	3,533	10,404	46,499
SUPPLEMENTAL DISCLOSURE OF NON-CASH ACTIVITY:
Utility Plant received as Construction Advances and Contributions	4,750	5,080	7,770
Long-term Debt Deobligation	64	258	130
Cash Paid During the Year for:
Interest	8,546	7,644	6,938
Interest Capitalized	1,148	1,513	1,149
Income Taxes	$ 3,335	$ 2,509	$ 10,339

CONSOLIDATED STATEMENTS OF CA_2

CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of Cash Flows [Abstract]
Allowance for funds used during construction	$ 1,148	$ 1,513	$ 1,149

CONSOLIDATED STATEMENTS OF CAPI

CONSOLIDATED STATEMENTS OF CAPITAL STOCK AND LONG-TERM DEBT - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Common Stock, No Par Value	$ 221,919	$ 217,451
Retained Earnings	145,807	128,757
TOTAL COMMON EQUITY	367,726	346,208
TOTAL PREFERRED STOCK	2,084	2,084
SUBTOTAL LONG-TERM DEBT	311,146	277,241
Add: Premium on Issuance of Long-term Debt	7,271	7,669
Less: Unamortized Debt Expense	(5,166)	(4,411)
Less: Current Portion of Long-term Debt	(6,731)	(7,255)
TOTAL LONG-TERM DEBT	306,520	273,244
Convertible Preferred Stock $7.00 Series
TOTAL PREFERRED STOCK	1,005	1,005
Nonredeemable Preferred Stock $7.00 Series
TOTAL PREFERRED STOCK	79	79
Nonredeemable Preferred Stock $4.75 Series [Member]
TOTAL PREFERRED STOCK	1,000	1,000
First Mortgage Bonds [Member]
SUBTOTAL LONG-TERM DEBT	203,892	187,667
Amortizing Secured Notes [Member]
SUBTOTAL LONG-TERM DEBT	47,613	30,643
State Revolving Trust Notes [Member]
SUBTOTAL LONG-TERM DEBT	7,510	8,384
State Revolving Fund Bond [Member]
SUBTOTAL LONG-TERM DEBT		11
Construction Loans [Member]
SUBTOTAL LONG-TERM DEBT	$ 52,131	$ 50,536

CONSOLIDATED STATEMENTS OF CA_3

CONSOLIDATED STATEMENTS OF CAPITAL STOCK AND LONG-TERM DEBT (Parenthetical) - shares shares in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Common Stock, Shares Authorized	40,000	40,000
Common Stock, Shares Outstanding	17,522	17,473
Preferred Stock, Shares Authorized	120	120
Preferred Stock, Shares Outstanding	20	20
Convertible Preferred Stock $7.00 Series
Preferred Stock, Shares Outstanding	10	10
Nonredeemable Preferred Stock $7.00 Series
Preferred Stock, Shares Outstanding	1	1
Nonredeemable Preferred Stock $4.75 Series [Member]
Preferred Stock, Shares Outstanding	10	10
First Mortgage Bonds due 2023-2059 [Member]
Long term debt maturity period	2023-2059
First Mortgage Bonds due 2023-2059 [Member] | Minimum [Member]
Interest rate	0.00%
First Mortgage Bonds due 2023-2059 [Member] | Maximum [Member]
Interest rate	5.50%
Amortizing Secured Notes due 2028-2046 [Member]
Long term debt maturity period	2028-2046
Amortizing Secured Notes due 2028-2046 [Member] | Minimum [Member]
Interest rate	3.94%
Amortizing Secured Notes due 2028-2046 [Member] | Maximum [Member]
Interest rate	7.05%
State Revolving Trust Notes due 2022-2038 [Member]
Long term debt maturity period	2022-2038
State Revolving Trust Notes due 2022-2038 [Member] | Minimum [Member]
Interest rate	2.00%
State Revolving Trust Notes due 2022-2038 [Member] | Maximum [Member]
Interest rate	4.22%
State Revolving Fund Bond due 2021 [Member]
Interest rate	0.00%
Long term debt maturity period	2021
Construction Loans [Member]
Interest rate	0.00%

CONSOLIDATED STATEMENTS OF COMM

CONSOLIDATED STATEMENTS OF COMMON STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Common Stock [Member]	Retained Earnings [Member]	Total
Balance at Dec. 31, 2018	$ 157,354	$ 91,433	$ 248,787
Balance, shares at Dec. 31, 2018	16,403
Net Income		33,888	33,888
Dividend Reinvestment & Common Stock Purchase Plan	$ 12,738		12,738
Dividend Reinvestment & Common Stock Purchase Plan, shares	226
Restricted Stock Award, Net - Employees	$ 907		907
Restricted Stock Award, Net - Employees, shares	18
Stock Award - Board Of Directors	$ 196		196
Stock Award - Board Of Directors, shares	4
Shares Forefeited	$ (466)		(466)
Shares Forfeited, shares	(18)
Conversion of Convertible Preferred Stock	$ 350		350
Conversion of Convertible Preferred Stock, shares	41
Issuance of Common Stock	$ 44,046		44,046
Issuance of Common Stock, shares	760
Cash Dividends on Common Stock		(16,165)	(16,165)
Cash Dividends on Preferred Stock		(132)	(132)
Common Stock Expenses		(357)	(357)
Balance at Dec. 31, 2019	$ 215,125	108,667	323,792
Balance, shares at Dec. 31, 2019	17,434
Net Income		38,425	38,425
Dividend Reinvestment & Common Stock Purchase Plan	$ 1,230		1,230
Dividend Reinvestment & Common Stock Purchase Plan, shares	19
Restricted Stock Award, Net - Employees	$ 851		851
Restricted Stock Award, Net - Employees, shares	16
Stock Award - Board Of Directors	$ 245		245
Stock Award - Board Of Directors, shares	4
Cash Dividends on Common Stock		(18,178)	(18,178)
Cash Dividends on Preferred Stock		(120)	(120)
Common Stock Expenses		(37)	(37)
Balance at Dec. 31, 2020	$ 217,451	128,757	346,208
Balance, shares at Dec. 31, 2020	17,473
Net Income		36,543	36,543
Dividend Reinvestment & Common Stock Purchase Plan	$ 3,837		3,837
Dividend Reinvestment & Common Stock Purchase Plan, shares	40
Restricted Stock Award, Net - Employees	$ 350		350
Restricted Stock Award, Net - Employees, shares	6
Stock Award - Board Of Directors	$ 281		281
Stock Award - Board Of Directors, shares	3
Cash Dividends on Common Stock		(19,373)	(19,373)
Cash Dividends on Preferred Stock		(120)	(120)
Balance at Dec. 31, 2021	$ 221,919	$ 145,807	$ 367,726
Balance, shares at Dec. 31, 2021	17,522

CONSOLIDATED STATEMENTS OF CO_2

CONSOLIDATED STATEMENTS OF COMMON STOCKHOLDERS' EQUITY (Parenthetical) - $ / shares	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of Stockholders' Equity [Abstract]
Cash dividends paid, per share	$ 0.2900	$ 0.2725	$ 0.2725	$ 0.2725	$ 0.2725	$ 0.2563	$ 0.2563	$ 0.2563	$ 1.108	$ 1.041	$ 0.976

Organization, Summary of Signif

Organization, Summary of Significant Accounting Policies and Recent Developments	12 Months Ended
	Dec. 31, 2021
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 and in Delaware, through our wholly-owned subsidiary, Tidewater, since 1992. 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. 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 and Delaware by the New Jersey Board of Public Utilities (NJBPU) and the Delaware Public Service Commission (DEPSC), respectively. Our USA, USA-PA and White Marsh subsidiaries are not regulated utilities. (b) Principles of Consolidation - (c) System of Accounts - (d) Regulatory Accounting Regulated Operations In accordance with ASC 980, Regulated Operations Rate and Regulatory Matters (e) Retirement Benefit Plans 46 Index 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 – Employee Benefit Plans (f) Utility Plant - (g) Depreciation - Source of Supply 1.15% - 3.44% Transmission and Distribution (T&D): Pumping 2.00% - 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% Wastewater Collection 1.42% - 1.81% 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 to 42 years. (h) Preliminary Survey and Investigation (PS&I) Costs - (i) Customers’ Advances for Construction (CAC) - Contributions in Aid of Construction (CIAC) In accordance with regulatory requirements, CAC and CIAC are not depreciated. In addition, these amounts reduce the investment base for purposes of setting rates. (j) Allowance for Funds Used During Construction (AFUDC) 2021 2020 2019 Middlesex 6.50% 6.50% 6.50% Tidewater 7.92% 7.92% 7.92% 47 Index (k) Accounts Receivable Note 1 (s), COVID-19 (l) Revenues The Company’s regulated revenue results from tariff-based sales from the provision of water and wastewater services to residential, industrial, commercial, fire-protection and wholesale customers. Residential customers are billed quarterly while most industrial, commercial, fire-protection and wholesale customers are billed monthly. Payments by customers are due between 15 to 30 days after the invoice date. Revenue is recognized as the water and wastewater services are delivered to customers as well as from accrual of unbilled revenues estimated from the last meter reading date to the end of the accounting period utilizing factors such as historical customer data, regional weather indicators and general economic conditions in the relevant service territories. Unearned Revenues and Advance Service Fees include fixed service charge billings in advance to Tidewater customers recognized as service is provided to the customer. Non-regulated service contract revenues consist of base service fees as well as fees for additional billable services provided to customers. Fees are billed monthly and are due within 30 days after the invoice date. The Company considers the amounts billed to represent the value of these services provided to customers. These contracts expire at various times through June 2030 and contain remaining performance obligations for which the Company expects to recognize revenue in the future. These contracts also contain customary termination provisions. Substantially all of the amounts included in operating revenues and accounts receivable are from contracts with customers. The Company records its allowance for doubtful accounts based on historical write-offs combined with an evaluation of current economic conditions within its service territories. The Company’s contracts do not contain any significant financing components. 48 Index The Company’s operating revenues are comprised of the following: (In Thousands) Years Ended December 31, 2021 2020 2019 Regulated Tariff Sales Residential $ 77,699 $ 76,798 $ 71,487 Commercial 16,715 15,448 15,198 Industrial 8,990 9,512 9,390 Fire Protection 12,608 12,374 12,291 Wholesale 14,590 15,187 14,319 Non-Regulated Contract Operations 12,391 12,130 11,773 Total Revenue from Contracts with Customers $ 142,993 $ 141,449 $ 134,458 Other Regulated Revenues 929 532 393 Other Non-Regulated Revenues 427 415 404 Inter-segment Elimination (1,208 ) (804 ) (657 ) Total Revenue $ 143,141 $ 141,592 $ 134,598 (m) Unamortized Debt Expense and Premiums on Long-Term Debt (n) Income Taxes Income Taxes (o) Cash and Cash Equivalents (p) Restricted Cash (q) Use of Estimates (r) Recent Accounting Pronouncements (s) COVID-19 Pandemic 49 Index The NJBPU and the DEPSC have approved the tracking of COVID-19 related incremental costs for potential recovery in customer rates in future rate proceedings. Neither jurisdiction has established a timetable or definitive formal procedures for seeking cost recovery. Since March 2020, the Company has increased its allowance for doubtful accounts for expected increases in accounts receivable write-offs due to the financial impact of COVID-19 on customers. The Company has not deferred any COVID-19 related incremental costs. We will continue to monitor the effects of COVID-19. (t) Regulatory Notice of Non-Compliance – The NJDEP standard for PFOA was developed based on a Health-based Maximum Contaminant Level (MCL) of 14 parts per trillion (ppt). Although the United States Environmental Protection Agency (USEPA) has not yet implemented an enforceable regulation relative to PFOA, the water distributed from the Park Avenue Well Field Treatment Plant does meet the USEPA’s current health advisory level of 70 parts per trillion (ppt) and would meet the NJDEP’s pre-2021 standard guidance level of 40 ppt, which was not a regulation. Construction of an enhanced treatment process at the Park Avenue Well Field Treatment Plant to comply with the NJDEP standard had already begun when the Notice was issued by the NJDEP. Since completion is not expected until mid-2023, in December 2021, the Company implemented an interim solution to meet the Notice requirements. The Park Avenue Well Field Treatment Plant was taken off-line and alternate sources of supply have been obtained. The Company is in the process of implementing an acceleration of a portion of the Park Avenue Wellfield treatment upgrades in order to meet anticipated increases in the historical higher water demand periods during the summer months and is also intended to result in compliance with the requirements of the Notice. In November 2021, the Company was served with two PFOA-related class action lawsuits seeking restitution for medical, water replacement and other claimed related costs. These lawsuits are in the early stages of the legal process and their ultimate resolution cannot be predicted at this time. The Company’s insurance provider has acknowledged coverage of potential liability resulting from these lawsuits. In 2018, the Company identified the party believed to be the source of the PFAS in the wells supplying the Park Avenue Well Field Treatment Plant and filed a lawsuit against that entity seeking compensatory damages for the resulting damage to its properties and costs to remediate PFAS, punitive damages and attorney’s fees and costs. The ultimate resolution of this matter cannot be predicted at this time. In January 2022, the Company filed a petition with the NJBPU seeking to establish a regulatory asset and deferred accounting until its next base rate setting proceeding for all costs associated with the interim solution to comply with the Notice. While the Company believes other administrative or monetary penalties are unlikely, the issuance of the Notice does not preclude the State of New Jersey or any of its agencies from initiating formal administrative and/or judicial enforcement action, including assessment of penalties of up to $25,000 per day per offense if the Company is not in compliance with the requirements of the Notice by September 7, 2022. (u) Sale of Subsidiary

Rate and Regulatory Matters

Rate and Regulatory Matters	12 Months Ended
	Dec. 31, 2021
Regulated Operations [Abstract]
Rate and Regulatory Matters	Note 2 - Rate and Regulatory Matters Rate Matters Middlesex In March 2021, the NJBPU approved Middlesex’s annual petition to reset its PWAC tariff rate to recover additional costs of $1.1 million for the purchase of treated water from a non-affiliated regulated water utility. The new PWAC rate became effective April 4, 2021. In March 2020, the NJBPU approved Middlesex’s annual petition to reset its PWAC tariff rate to recover additional costs of $0.6 million for the purchase of treated water from a non-affiliated water utility regulated by the NJBPU. The new PWAC rate became effective on April 4, 2020. Tidewater - In March 2021, Tidewater was notified by the DEPSC that it had determined Tidewater’s earned rate of return exceeded the rate of return authorized by the DEPSC. Consequently, Tidewater reset its DSIC rate to zero effective April 1, 2021 and has refunded customers, with interest, primarily in the form of an account credit for DSIC revenue billed between April 1, 2020 and March 31, 2021. Accordingly, in March 2021, Tidewater recorded a $0.8 million reserve, net of tax, for such refunds. Tidewater applied the refund credits to individual customer accounts during the second quarter of 2021. Effective March 1, 2019, Tidewater received approval from the DEPSC to reduce its rates to reflect the lower corporate income tax rate enacted by the Tax Cuts and Jobs Act of 2017 (2017 Tax Act), resulting in a 3.35% rate decrease for certain customer classes. Pinelands - Southern Shores - 51 Index Twin Lakes Utilities, Inc. (Twin Lakes) - The financial results, total assets and financial obligations of Twin Lakes are not material to Middlesex. 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 2021 2020 Recovery Periods Retirement Benefits $ 24,926 $ 45,419 Various Income Taxes 70,427 66,759 Various Rate Cases, Tank Painting, and Other 5,385 5,966 2-10 years Total $ 100,738 $ 118,144 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 2017 Tax Act reduced the statutory corporate federal income tax rate from 35% to 21%. The tariff rates charged to customers effective prior to 2018 in the Company’s regulated companies include recovery of income taxes at the statutory rate in effect at the time those rates were approved by the respective state public utility commissions. As of December 31, 2021 and 2020, the Company has recorded regulatory liabilities of $30.4 million and $31.0 million, respectively for excess income taxes collected through rates due to the lower income tax rate under the 2017 Tax Act. These regulatory liabilities are overwhelmingly related to utility plant depreciation deduction timing differences, which are subject to Internal Revenue Service (IRS) normalization rules. The IRS rules limit how quickly the excess taxes attributable to accelerated taxes can be returned to customers. The current base rates for Middlesex, Pinelands and Twin Lakes’ customers became effective after 2017 and reflect the impact of the 2017 Tax Act on their revenue requirements. In February 2019, Tidewater received approval from the DEPSC to reduce its base rates to reflect the lower statutory corporate income tax rate enacted by the 2017 Tax Act (see Rate Matters-Tidewater As part of Middlesex’s March 2018 base water rate settlement with the NJBPU, Middlesex received approval for regulatory accounting treatment of income tax benefits associated with the adoption of tangible property regulations issued by the IRS (see Rate Matters-Middlesex 52 Index 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, 2021 and 2020, the Company has approximately $16.1 million and $14.9 million, respectively, of expected costs of removal recovered currently in rates in excess of actual costs incurred as regulatory liabilities.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Income Taxes	Note 3 - Income Taxes Income tax (benefit) 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, 2021 2020 2019 Income Tax at Statutory Rate $ 6,521 $ 7,204 $ 6,457 Tax Effect of: Utility Plant Related (1,290 ) (1,356 ) (802 ) Tangible Property Repairs (12,281 ) (11,298 ) (10,156 ) State Income Taxes – Net 1,499 1,364 1,173 Other 63 (33 ) 188 Total Income Tax (Benefit) Expense $ (5,488 ) $ (4,119 ) $ (3,140 ) Income tax (benefit) expense is comprised of the following: (Thousands of Dollars) Years Ended December 31, 2021 2020 2019 Current: Federal $ (8,247 ) $ (4,281 ) $ (3,822 ) State 1,467 2,598 2,246 Deferred: Federal 933 (1,490 ) (726 ) State 431 (871 ) (761 ) Investment Tax Credits (72 ) (75 ) (77 ) Total Income Tax (Benefit) Expense $ (5,488 ) $ (4,119 ) $ (3,140 ) As part of Middlesex’s March 2018 base water rate settlement with the NJBPU, Middlesex received approval for regulatory accounting treatment of income tax benefits associated with the adoption of tangible property regulations issued by the IRS as well as prospective recognition of the income tax benefits for the immediate deduction of repair costs on tangible property. This results in significant reductions in the Company’s effective income tax rate, current income tax (benefit) expense and deferred income tax (benefit) expense. 53 Index 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, 2021 2020 Utility Plant Related $ 65,107 $ 56,868 Customer Advances (3,595 ) (3,626 ) Employee Benefits 7,091 7,339 Investment Tax Credits 373 445 Other 524 271 Total Accumulated Deferred Income Taxes $ 69,500 $ 61,297 The Company’s federal income tax returns for the tax years 2014 through 2017 were selected for examination by the IRS, which included the tax year in which the Company had adopted the final IRS tangible property regulations and changed its accounting method for the tax treatment of expenditures that qualified as deductible repairs. As a result of the audit examination, the Company agreed to certain modifications of its accounting method for expenditures that qualify as deductible repairs. In 2019, the Company paid $2.7 million in income taxes and $0.1 million in interest in connection with the conclusion of the 2014 through 2017 federal income tax return audits. As of December 31, 2021, the Company’s income tax reserve provision and interest expense liability are $0.5 million and $0.2 million, respectively. The statutory review periods for federal income tax returns for the years prior to 2018 have been closed. Other than the effects of the provision against refundable taxes discussed above, there are no unrecognized tax benefits resulting from prior period tax positions.

Commitments and Contingent Liab

Commitments and Contingent Liabilities	12 Months Ended
	Dec. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingent Liabilities	Note 4 - Commitments and Contingent Liabilities Water Supply Middlesex also has an agreement with a non-affiliated NJBPU-regulated water utility for the purchase of treated water. This agreement, which expires February 27, 2026, provides for the minimum purchase of 3.0 mgd of treated water with provisions for additional purchases if needed. Tidewater contracts with the City of Dover, Delaware to purchase treated water of 15.0 million gallons annually. Purchased water costs are shown below: (Millions of Dollars) Years Ended December 31, 2021 2020 2019 Untreated $ 3.3 $ 3.4 $ 3.4 Treated 3.6 3.6 3.2 Total Costs $ 6.9 $ 7.0 $ 6.6 Guarantees - In November 2019, Middlesex was notified that the County terminated its Agreement with the Contractor. The Contractor had initiated legal action against the County that in part contests the County’s exercise of this termination. The County filed a counter-claim against the Contractor’s parent company and has brought Middlesex into the suit as a third-party defendant. Our ongoing monitoring of this litigation has led to the conclusion that we do not anticipate the ultimate outcome will have a material impact on the Company’s results of operations or financial condition. 54 Index Leases - The Company has entered into an operating lease of office space for administrative purposes, expiring in 2030. The Company has not entered into any finance leases. The exercise of a lease renewal option for the Company’s administrative offices is solely at the discretion of the Company. The right-of-use (ROU) asset recorded represents the Company’s right to use an underlying asset for the lease term and lease liability represents the Company’s obligation to make lease payments arising from the lease. Lease ROU assets and liabilities are recognized at commencement date based on the present value of lease payments over the lease term. The Company’s operating lease does not provide an implicit discount rate and as such the Company used an estimated incremental borrowing rate (4.03%) based on the information available at commencement date in determining the present value of lease payments. Given the impacts of accounting for regulated operations, and the resulting recognition of expense at the amounts recovered in customer rates, expenditures for operating leases are consistent with lease expense and was $0.8 million, $0.8 million and $0.7 million for the years ended December 31, 2021, 2020 and 2019, respectively. Information related to operating lease ROU assets is as follows: (In Millions) December 31, 2021 2020 ROU Asset at Lease Inception $ 7.3 $ 7.3 Accumulated Amortization (2.8 ) (2.1 ) Current ROU Asset $ 4.5 $ 5.2 The Company’s future minimum operating lease commitments as of December 31, 2021 are as follows: (In Millions) December 31, 2021 2022 $ 0.8 2023 0.8 2024 0.8 2025 0.8 2026 0.9 Thereafter 2.9 Total Lease Payments $ 7.0 Imputed Interest (1.8 ) Present Value of Lease Payments 5.2 Less Current Portion* (0.8 ) Non-Current Lease Liability $ 4.4 * Included in Other Current Liabilities 55 Index Construction Note 1(s) COVID-19 Contingencies PFOA Matter - Note 1(t) Regulatory Notice of Non-Compliance Change in Control Agreements

Short-term Borrowings

Short-term Borrowings	12 Months Ended
	Dec. 31, 2021
Short-term Debt [Abstract]
Short-term Borrowings	Note 5 - Short-term Borrowings Information regarding the Company’s short-term borrowings for the years ended December 31, 2021 and 2020 is summarized below: (Millions of Dollars) 2021 2020 Average Amount Outstanding $ 23.7 $ 28.3 Weighted Average Interest Rate 1.12 % 1.55 % Notes Payable at Year-End $ 13.0 $ 2.0 Weighted Average Interest Rate at Year-End 1.04 % 1.04 % The Company maintained lines of credit aggregating $110.0 million and $140.0 million at December 31, 2021 and 2020, respectively. (Millions) As of December 31, 2021 Line of Credit Outstanding Available Maximum Credit Type Renewal Date Bank of America $ - $ 30.0 $ 30.0 Uncommitted January 26, 2023 PNC Bank 12.0 56.0 68.0 Committed January 31, 2024 CoBank 1.0 11.0 12.0 Committed November 30, 2023 $ 13.0 $ 97.0 $ 110.0 56 Index The Company's Bank of America line of credit was renewed on January 27, 2022 and will increase to $60.0 million, increasing the Company's total available lines of credit to $140.0 million. The Bank of America line of credit is renewed on an annual basis. The maturity dates for the Notes Payable as of December 31, 2021 are in January 2022 and are extendable at the discretion of the Company. The interest rates for borrowings under the lines of credit through December 31, 2021 were set using the London InterBank Offered Rate (LIBOR) and adding a credit spread, which varies by financial institution. Beginning in January 2022, borrowing rates will be set using the Bloomberg Short-Term Bank Yield Index. There is no requirement for a compensating balance under any of the established lines of credit.

Capitalization

Capitalization	12 Months Ended
	Dec. 31, 2021
CAPITALIZATION:
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 issues shares of its common stock in connection with its Middlesex Water Company Investment Plan (the Investment Plan), a direct share purchase and dividend reinvestment plan for the Company’s common stock. The Company raised approximately $3.8 million under the Investment Plan during 2021. On September 1, 2021, the Company began offering shares of its common stock for purchase at a 3% discount to participants in the Investment Plan. The discount offering will continue until 200,000 shares are purchased at the discounted price or August 1, 2022, whichever event occurs first. Through February 25, 2022, 44,323 shares have been purchased through the discounted offering. The discount applies to all common stock purchases made under the Investment Plan, whether by optional cash payment or by dividend reinvestment. Since the inception of the Investment Plan and its predecessor plan, the Company has periodically replenished the level of authorized shares in the plans. Currently, 0.3 million shares remain registered with the United States Securities and Exchange Commission for the Investment Plan and available for potential issuance to participants. In 2019, the Company raised approximately $12.7 million primarily through a limited duration six-month share purchase discount feature of the Investment Plan. In November 2019, the Company sold and issued 0.8 million shares of common stock in a public offering priced at $60.50 per share. The net proceeds of $43.7 million were used for general corporate purposes including repayment of a portion of the Company’s short-term debt. The Company issues common shares under a restricted stock plan for certain management employees, which is described in Note 7 – Employee Benefit Plans The Company maintains a stock plan for its independent Directors as a component of outside members of the Board of Directors compensation. For the years ended December 31, 2021, 2020 and 2019, 3,444, 4,074 and 3,521 shares, respectively, of Middlesex common stock were granted and issued to the Company’s independent Directors under the plan. The maximum number of shares authorized for grant under the plan is 100,000, of which 49,125 shares remain available for future awards. In the event dividends on the preferred stock are in arrears, no dividends may be declared or paid on the common stock of the Company. Preferred Stock At December 31, 2021 and 2020, there were 120,000 shares of preferred stock authorized and less than 21,000 shares of preferred stock outstanding. There were no preferred stock dividends in arrears. 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. 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. 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. 57 Index The conversion feature of the no par $7.00 Series Cumulative and Convertible Preferred Stock allows the security holders to exchange one convertible preferred share for twelve shares of the Company's common stock. In addition, the Company may redeem up to 10% of the outstanding convertible stock in any calendar year at a price equal to the fair value of twelve shares of the Company's common stock for each share of convertible stock redeemed. Long-term Debt Subject to regulatory approval, the Company periodically issues long-term debt to fund its investments in utility plant. To the extent possible and fiscally prudent, the Company finances qualifying capital projects under State Revolving Fund (SRF) loan programs in New Jersey and Delaware. These government programs provide financing at interest rates typically below rates available in the broader financial markets. A portion of the borrowings under the New Jersey SRF is interest-free. Under the New Jersey SRF program, borrowers first enter into a construction loan agreement with the New Jersey Infrastructure Bank (NJIB) at a below market interest rate. The interest rate on the Company’s current construction loan borrowings is zero percent (0%). When construction on the qualifying project is substantially complete, NJIB will coordinate the conversion of the construction loan into a long-term securitized loan with a portion of the principal balance having a stated interest rate of zero percent (0%) and a portion of the principal balance at a market interest rate at the time of closing using the credit rating of the State of New Jersey. The term of the long-term loans currently offered through the NJIB is up to thirty years. Middlesex currently has two projects in the construction loan phase of the New Jersey SRF program: • In April 2018, the NJBPU approved Middlesex’s request to participate in the NJIB loan program to fund the construction of a 4.5 mile large-diameter transmission pipeline from the Carl J. Olsen water treatment plant in Edison, New Jersey and interconnect with our distribution system. Middlesex closed on a $43.5 million NJIB construction loan in August 2018 and completed withdrawal of the proceeds in June 2021; and • In March 2018, the NJBPU approved Middlesex’s request to participate in the NJIB loan program to fund the 2018 RENEW Program, which is an ongoing initiative to rehabilitate or replace water distribution mains in the Middlesex system. Middlesex closed on an $8.7 million NJIB construction loan in September 2018 and completed withdrawal of the proceeds in October 2019. The Company anticipates these two construction loans will be converted into long-term securitized loans by the NJIB by June 30, 2022. The NJIB has changed the SRF program for project funding priority ranking, the proportions of interest free loans and market interest rate loans and overall loan limits on interest free loan balances to investor-owned water utilities. These changes affect SRF projects for which the construction loan closes after September 2018. Under the new guidelines, the principal balance having a stated interest rate of zero percent (0%) is 25% of the loan balance with the remaining portion of 75% having a market based interest rate. This is limited to the first $10.0 million of the loan. Loan amounts above $10.0 million do not participate in the 0% rate program, but do participate at the market based interest rate. As a result of all these changes, the Company’s future capital funding plan currently does not include participating in the NJIB SRF program. In June 2021, Middlesex received approval from the NJBPU to redeem up to $45.5 million of outstanding first mortgage bonds (FMBs), specifically Series RR ($22.5 million) and Series SS ($23.0 million), and issue replacement FMBs at an overall lower cost of debt. In November 2021, Middlesex closed on a $45.5 million, 2.90% private placement of FMBs, designated as Series 2021B with a 2051 58 Index In May 2020, Middlesex received approval from the NJBPU to borrow up to $100 million, in one or more private placement transactions through December 31, 2023 to help fund Middlesex’s multi-year capital construction program. In connection with this approval: • In November 2021, Middlesex closed on a $19.5 million, 2.79% private placement of FMBs with a 2041 • In November 2020, Middlesex closed on a $40.0 million, 2.90% private placement of FMBs with a 2050 In November 2021, Tidewater received approval from the DEPSC to borrow up to $5.0 million under the Delaware SRF Program for construction of a one million gallon elevated storage tank. Tidewater closed on the $5.0 million loan in December 2021 and began receiving disbursements in January 2022. Borrowing under this loan is expected to continue through mid-2023. The final maturity date on the loan is 2044 In March 2021, Tidewater entered into a loan agreement with CoBank, ACB, pursuant to which Tidewater borrowed $20.0 million in September 2021 at an interest rate of 3.94% with a 2046 In order to help ensure adherence to its comprehensive financing plan, Middlesex received approval from the NJBPU in February 2019 to issue and sell up to $140 million of FMBs through the New Jersey Economic Development Authority (NJEDA) in one or more transactions through December 31, 2022. Because the interest paid to the bondholders is exempt from federal and New Jersey income taxes, the interest rate on debt issued through the NJEDA is generally lower than otherwise achievable in the traditional taxable corporate bond market. However, the interest received by the bondholder is subject to the Alternative Minimum Tax. In August 2019, Middlesex priced and closed on a NJEDA debt financing transaction of $53.7 million by issuing FMBs designated as Series 2019A ($32.5 million at coupon interest rate of 4.0%) and Series 2019B ($21.2 million at coupon interest rate of 5.0%). The proceeds, including an issuance premium of $7.1 million, were used to finance several projects under the Water For Tomorrow capital program initiated by the Company to upgrade and replace aging water utility infrastructure. The total proceeds of $60.8 million, initially recorded as Restricted Cash on the balance sheet, were held in escrow by a bond trustee. Funds were drawn down by requisition for the qualifying projects as costs were incurred with the final requisition made in February 2021. In March 2018, the DEPSC approved Tidewater’s request to borrow up to $0.9 million under the Delaware SRF program to fund the replacement of an entire water distribution system of a small Delaware community. Tidewater closed on the SRF loan in May 2018. In April 2019, Tidewater received approval from the DEPSC to increase the borrowing to $1.7 million based on revised project cost estimates. Tidewater closed on the additional SRF loan in October 2019 and completed withdrawal of the proceeds in April 2020. FMBs Series 2019A, 2019B, 2020A, 2021A and 2021B and the CoBank 2021 Amortizing Secured Note are term bonds with single maturity dates subsequent to 2026. The aggregate annual principal repayment obligations for all long-term debt over the next five years are shown below: Year (Millions of Dollars) Annual Maturities 2022 $ 6.7 2023 $ 16.1 2024 $ 6.0 2025 $ 5.6 2026 $ 5.4 The weighted average interest rate on all long-term debt at December 31, 2021 and 2020 was 2.83% and 3.02%, respectively. Except for the FMB Series 2020 ($40.0 million), FMB Series 2021 ($65.0 million) and Amortizing Secured Notes ($47.6 million), all of the Company’s outstanding long-term debt has been issued through the NJEDA ($63.6 million), the NJIB SRF program ($87.4 million) and the Delaware SRF program ($7.5 million). 59 Index 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 years ended December 31, 2021, 2020 and 2019. Basic EPS is computed on the basis of the weighted average number of shares outstanding. Diluted EPS assumes the conversion of both the Convertible Preferred Stock $7.00 Series and $8.00 Series (fully converted into common stock in September 2019). (In Thousands, Except Per Share Amounts) 2021 2020 2019 Basic: Income Shares Income Shares Income Shares Net Income $ 36,543 17,492 $ 38,425 17,459 $ 33,888 16,685 Preferred Dividend (120 ) (120 ) (132 ) Earnings Applicable to Common Stock $ 36,423 17,492 $ 38,305 17,459 $ 33,756 16,685 Basic EPS $ 2.08 $ 2.19 $ 2.02 Diluted: Earnings Applicable to Common Stock $ 36,423 17,492 $ 38,305 17,459 $ 33,756 16,685 $7.00 Series Dividend 67 115 67 115 67 115 $8.00 Series Dividend - - - - 12 29 Adjusted Earnings Applicable to Common Stock $ 36,490 17,607 $ 38,372 17,574 $ 33,835 16,829 Diluted EPS $ 2.07 $ 2.18 $ 2.01 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 FMBs issued by Middlesex 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 in the table below are classified as Level 2 measurements. The carrying amount and fair value of the Bonds were as follows: (Thousands of Dollars) At December 31, 2021 2020 Carrying Fair Carrying Fair Amount Value Amount Value FMBs $ 98,828 $ 107,781 $ 147,667 $ 159,195 It was not practicable to estimate their fair value on our outstanding long-term debt for which there is no quoted market price and there is not an active trading market. For details, including carrying value, interest rate and due date on these series of long-term debt, please refer to those series of long-term debt titled “Amortizing Secured Notes”, “State Revolving Trust Notes”, “State Revolving Fund Bond” and “Construction Loans” on the Consolidated Statements of Capital Stock and Long-Term Debt. The carrying amount of these instruments was $212.3 million and $129.6 million at December 31, 2021 and 2020, respectively. Customer advances for construction have carrying amounts of $23.5 million and $23.4 million at December 31, 2021 and 2020, respectively. Their relative fair values cannot be accurately estimated since future refund payments depend on several variables, including new customer connections, customer consumption levels and future rate increases.

Employee Benefit Plans

Employee Benefit Plans	12 Months Ended
	Dec. 31, 2021
Retirement Benefits [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 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. Regulatory Treatment of Over/Underfunded Retirement Obligations Because the Company is subject to rate 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 Regulated Operations Compensation – Retirement Benefits The Company uses a December 31 measurement date for all of its employee benefit plans. The tables below set forth information relating to the Company’s Pension Plan and Other Benefits Plan for 2021 and 2020. ( Thousands of Dollars) Pension Plan Other Benefits Plan December 31, 2021 2020 2021 2020 Change in Projected Benefit Obligation: Beginning Balance $ 115,861 $ 100,891 $ 52,776 $ 55,166 Service Cost 2,696 2,434 917 993 Interest Cost 2,706 3,099 1,236 1,699 Actuarial (Gain) Loss (4,185 ) 12,585 (4,705 ) (4,279 ) Benefits Paid (3,368 ) (3,148 ) (828 ) (803 ) Ending Balance $ 113,710 $ 115,861 $ 49,396 $ 52,776 61 Index Pension Plan Other Benefits Plan December 31, 2021 2020 2021 2020 Change in Fair Value of Plan Assets: Beginning Balance $ 88,921 $ 80,380 $ 44,892 $ 40,613 Actual Return on Plan Assets 11,798 8,289 5,776 3,988 Employer Contributions 3,400 3,400 828 1,094 Benefits Paid (3,369 ) (3,148 ) (828 ) (803 ) Ending Balance $ 100,750 $ 88,921 $ 50,668 $ 44,892 Funded Status $ (12,960 ) $ (26,940 ) $ 1,272 $ (7,884 ) Pension Plan Other Benefits Plan December 31, 2021 2020 2021 2020 Amounts Recognized in the Consolidated Balance Sheets consist of: Current Liability $ 398 $ 398 $ - $ - Noncurrent Liability 12,562 26,542 (1,272 ) 7,884 Net Liability Recognized $ 12,960 $ 26,940 $ (1,272 ) $ 7,884 (Thousands of Dollars) Pension Plan Other Benefits Plan Years Ended December 31, 2021 2020 2019 2021 2020 2019 Components of Net Periodic Benefit Cost Service Cost $ 2,696 $ 2,434 $ 2,171 $ 917 $ 993 $ 839 Interest Cost 2,706 3,099 3,426 1,236 1,699 1,984 Expected Return on Plan Assets (6,225 ) (5,635 ) (4,694 ) (3,142 ) (2,853 ) (2,451 ) Amortization of Net Actuarial Loss 2,868 2,059 1,618 527 1,352 1,319 Net Periodic Benefit Cost* $ 2,045 $ 1,957 $ 2,521 $ (462 ) $ 1,191 $ 1,691 *Service cost is included in Operations and Maintenance expense on the consolidated statements of income; all other amounts are included in Other Income (Expense), net. Amounts that are expected to be amortized from Regulatory Assets into Net Periodic Benefit Cost in 2022 are as follows: (Thousands of Dollars) Pension Plan Other Benefits Plan Actuarial Loss $ 1,673 $ - 62 Index The discount rate and compensation increase rate for determining our postretirement benefit plans’ benefit obligations and costs as of and for the years ended December 31, 2021, 2020 and 2019, respectively, are as follows: Pension Plan Other Benefits Plan 2021 2020 2019 2021 2020 2019 Weighted Average Assumptions: Expected Return on Plan Assets 7.00 % 7.00 % 7.00 % 7.00 % 7.00 % 7.00 % Discount Rate for: Benefit Obligation 2.72 % 2.37 % 3.12 % 2.72 % 2.37 % 3.12 % Benefit Cost 2.37 % 3.12 % 4.15 % 2.37 % 3.12 % 4.15 % 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 utilizes the Society of Actuaries’ mortality table (Pri-2012) (Mortality Improvement Scale MP2021 for the 2021 valuation). For the 2021 valuation, costs and obligations for our Other Benefits Plan assumed a 7.5% annual rate of increase in the per capita cost of covered healthcare benefits in 2022 with the annual rate of increase declining 0.5% per year for 2023-2028, resulting in an annual rate of increase in the per capita cost of covered healthcare benefits of 4.5% by year 2028. A one-percentage point change in assumed healthcare cost trend rates would have the following effects on the Other Benefits Plan: (Thousands of Dollars) 1 Percentage Point Increase Decrease Effect on Current Year Service and Interest Costs $ 472 $ (359 ) Effect on Projected Benefit Obligation $ 7,882 $ (6,228 ) The following benefit payments, which reflect expected future service, are expected to be paid: (Thousands of Dollars) Year Pension Plan Other Benefits Plan 2022 $ 3,735 $ 1,345 2023 3,985 1,462 2024 4,771 1,573 2025 5,179 1,675 2026 5,183 1,782 2027-2031 27,539 9,803 Totals $ 50,392 $ 17,640 63 Index Benefit Plans Assets The allocation of plan assets at December 31, 2021 and 2020 by asset category is as follows: Pension Plan Other Benefits Plan Asset Category 2021 2020 Target 2021 2020 Target Equity Securities 59.6 % 60.6 % 55 % 66.8 % 62.3 % 43 % Debt Securities 37.9 % 37.5 % 38 % 30.7 % 31.0 % 50 % Cash 1.0 % 1.2 % 2 % 2.5 % 6.7 % 2 % Real Estate/Commodities 1.5 % 0.7 % 5 % 0.0 % 0.0 % 5 % Total 100.0 % 100.0 % 100.0 % 100.0 % Two outside investment firms each manage a portion of the Pension Plan asset portfolio. One of those investment firms also manages the Other Benefits Plan asset portfolio. Quarterly meetings are held between the Company’s Pension Committee of the Board of Directors and the investment managers to review their performance and asset allocation. If the actual asset allocation is outside the targeted range, the Pension Committee reviews current market conditions and advice provided by the investment managers to determine the appropriateness of rebalancing the portfolio. 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 $0 (0.0% of total Pension Plan assets) and $1.4 million (1.6% of total Pension Plan assets) as of December 31, 2021 and 2020, respectively. 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. 64 Index The following tables present Middlesex’s Pension Plan assets measured and recorded at fair value within the fair value hierarchy: (Thousands of Dollars) As of December 31, 2021 Level 1 Level 2 Level 3 Total Mutual Funds $ 87,687 $ - $ - $ 87,687 Money Market Funds 1,057 - - 1,057 Common Equity Securities 12,006 - - 12,006 Total Investments $ 100,750 $ - $ - $ 100,750 (Thousands of Dollars) As of December 31, 2020 Level 1 Level 2 Level 3 Total Mutual Funds $ 76,026 $ - $ - $ 76,026 Money Market Funds 1,086 - - 1,086 Common Equity Securities 11,809 - - 11,809 Total Investments $ 88,921 $ - $ - $ 88,921 The following tables present Middlesex’s Other Benefits Plan assets measured and recorded at fair value within the fair value hierarchy: (Thousands of Dollars) As of December 31, 2021 Level 1 Level 2 Level 3 Total Mutual Funds $ 33,844 $ - $ - $ 33,844 Money Market Funds 1,291 - - 1,291 Agency/US/State/Municipal Debt - 15,533 - 15,533 Total Investments $ 35,135 $ 15,533 $ - $ 50,668 (Thousands of Dollars) As of December 31, 2020 Level 1 Level 2 Level 3 Total Mutual Funds $ 27,408 $ - $ - $ 27,408 Money Market Funds 3,696 - - 3,696 Agency/US/State/Municipal Debt - 13,788 - 13,788 Total Investments $ 31,104 $ 13,788 $ - $ 44,892 Benefit Plans Contributions For the Pension Plan, Middlesex made total cash contributions of $3.4 million in 2021 and expects to make approximately $3.4 million of cash contributions in 2022. For the Other Benefits Plan, Middlesex made total cash contributions of $0.8 million in 2021 and expects to make approximately $0.8 million of cash contributions in 2022. 65 Index 401(k) Plan The Company maintains 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 contribution was $0.7 million for each of the years ended December 31, 2021, 2020 and 2019. Employees hired after March 31, 2007 are not eligible to participate in the Pension Plan and are generally eligible to participate in a discretionary profit sharing plan administered through the 401(k) plan. In December each year, the Board of Directors may approve that a stated percentage of eligible compensation be contributed to the account of the employee participant in the first quarter of the following year. For those employees still actively employed on December 31, 2021 or retired during the current year, the Company will fund a discretionary contribution of $0.8 million before April 1, 2022, which represents 5.0% of eligible 2021 compensation. For each of the years ended December 31, 2020 and 2019, the Company made qualifying discretionary contributions totaling $0.7 million. Stock-Based Compensation The Company maintains a long-term incentive compensation plan for certain management employees where awards are made in the form of restricted common stock. Shares of restricted stock issued under the plan are subject to forfeiture by the employee in the event of termination of employment for any reason within five years of the award other than as a result of retirement at normal retirement age, death, disability or change in control. The maximum number of shares authorized for award under the plan is 300,000 shares, of which approximately 84% remain available for award. The Company recognizes compensation expense at fair value for the plan awards in accordance with ASC 718, Compensation – Stock Compensation. Compensation expense is determined by the market value of the stock on the date of the award and is being amortized over the expected vesting period. The following table presents awarded but not yet vested share information for the plan: Shares (thousands) Unearned Compensation (thousands) Weighted Average Grant Price Balance, January 1, 2019 125 $ 1,638 Granted 18 975 $ 55.99 Vested (28 ) - Forfeited (18 ) - Amortization of Compensation Expense - (907 ) Balance, December 31, 2019 97 $ 1,706 Granted 16 982 $ 60.12 Vested (27 ) - Amortization of Compensation Expense - (851 ) Balance, December 31, 2020 86 $ 1,837 Granted 15 1,151 $ 79.02 Vested (18 ) - Amortization of Compensation Expense - (1,057 ) Balance, December 31, 2021 83 $ 1,931

Business Segment Data

Business Segment Data	12 Months Ended
	Dec. 31, 2021
Segment Reporting [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 and Delaware. 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 and Delaware 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: 2021 2020 2019 Revenues: Regulated $ 131,531 $ 129,851 $ 123,078 Non – Regulated 12,818 12,545 12,177 Inter-segment Elimination (1,208 ) (804 ) (657 ) Consolidated Revenues $ 143,141 $ 141,592 $ 134,598 Operating Income: Regulated $ 29,577 $ 34,043 $ 31,805 Non – Regulated 3,634 3,377 3,715 Consolidated Operating Income $ 33,211 $ 37,420 $ 35,520 Depreciation: Regulated $ 20,897 $ 18,264 $ 16,481 Non – Regulated 212 208 235 Consolidated Depreciation $ 21,109 $ 18,472 $ 16,716 Other Income (Expense), Net: Regulated $ 6,112 $ 4,605 $ 3,018 Non – Regulated 279 130 (253 ) Inter-segment Elimination (433 ) (356 ) (273 ) Consolidated Other Income (Expense), Net $ 5,958 $ 4,379 $ 2,492 Interest Charges: Regulated $ 8,529 $ 7,780 $ 7,456 Non – Regulated 17 70 81 Inter-segment Elimination (432 ) (357 ) (273 ) Consolidated Interest Charges $ 8,114 $ 7,493 $ 7,264 Income Taxes: Regulated $ (6,723 ) $ (5,139 ) $ (4,317 ) Non – Regulated 1,235 1,020 1,177 Consolidated Income Taxes $ (5,488 ) $ (4,119 ) $ (3,140 ) Net Income: Regulated $ 33,849 $ 35,951 $ 31,602 Non – Regulated 2,694 2,474 2,286 Consolidated Net Income $ 36,543 $ 38,425 $ 33,888 Capital Expenditures: Regulated $ 79,195 $ 105,091 $ 88,858 Non – Regulated 183 528 267 Total Capital Expenditures $ 79,378 $ 105,619 $ 89,125 67 Index (Thousands of Dollars) As of As of December 31, 2021 December 31, 2020 Assets: Regulated $ 1,022,116 $ 998,932 Non – Regulated 7,811 8,289 Inter-segment Elimination (9,912 ) (30,751 ) Consolidated Assets $ 1,020,015 $ 976,470

Quarterly Data - Unaudited

Quarterly Data - Unaudited	12 Months Ended
	Dec. 31, 2021
Quarterly Financial Information Disclosure [Abstract]
Quarterly Data - Unaudited	Note 9 - Quarterly Data - Unaudited Financial information for each quarter of 2021 and 2020 is as follows: (Thousands of Dollars, Except per Share Data) 2021 1 st 2 nd 3 rd 4 th Total Operating Revenues $ 32,541 $ 36,701 $ 39,874 $ 34,025 $ 143,141 Operating Income 5,634 9,814 11,424 6,339 33,211 Net Income 6,907 10,923 11,476 7,237 36,543 Basic Earnings per Share $ 0.39 $ 0.62 $ 0.65 $ 0.42 $ 2.08 Diluted Earnings per Share $ 0.39 $ 0.62 $ 0.65 $ 0.41 $ 2.07 Common Dividend Per Share $ 0.2725 $ 0.2725 $ 0.2725 $ 0.2900 $ 1.1075 High/Low Common Stock Price $ 85.92/$67.09 $ 88.61/$77.31 $ 116.40/$81.02 $ 119.37/$98.12 2020 1 st 2 nd 3 rd 4 th Total Operating Revenues $ 31,769 $ 35,277 $ 39,920 $ 34,626 $ 141,592 Operating Income 6,527 9,385 13,177 8,331 37,420 Net Income 7,668 9,713 12,737 8,307 38,425 Basic Earnings per Share $ 0.44 $ 0.55 $ 0.73 $ 0.47 $ 2.19 Diluted Earnings per Share $ 0.44 $ 0.55 $ 0.72 $ 0.47 $ 2.18 Common Dividend Per Share $ 0.2563 $ 0.2563 $ 0.2563 $ 0.2725 $ 1.0414 High/Low Common Stock Price $ 69.92/$48.79 $ 72.41/$53.70 $ 69.89/$59.61 $ 76.08/$61.81 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 slightly from previous filings due to the effects of rounding.

Organization, Summary of Sign_2

Organization, Summary of Significant Accounting Policies and Recent Developments (Policies)	12 Months Ended
	Dec. 31, 2021
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 and in Delaware, through our wholly-owned subsidiary, Tidewater, since 1992. 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. 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 and Delaware by the New Jersey Board of Public Utilities (NJBPU) and the Delaware Public Service Commission (DEPSC), respectively. Our USA, USA-PA and White Marsh subsidiaries are not regulated utilities.
Principles of Consolidation	(b) Principles of Consolidation -
System of Accounts	(c) System of Accounts -
Regulatory Accounting	(d) Regulatory Accounting Regulated Operations In accordance with ASC 980, Regulated Operations Rate and Regulatory Matters
Retirement Benefit Plans	(e) Retirement Benefit Plans 46 Index 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 – Employee Benefit Plans
Utility Plant	(f) Utility Plant -
Depreciation	(g) Depreciation - Source of Supply 1.15% - 3.44% Transmission and Distribution (T&D): Pumping 2.00% - 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% Wastewater Collection 1.42% - 1.81% 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 to 42 years.
Preliminary Survey and Investigation (PS&I) Costs	(h) Preliminary Survey and Investigation (PS&I) Costs -
Customers' Advances for Construction (CAC)	(i) Customers’ Advances for Construction (CAC) -
Contributions in Aid of Construction (CIAC)	Contributions in Aid of Construction (CIAC) In accordance with regulatory requirements, CAC and CIAC are not depreciated. 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) 2021 2020 2019 Middlesex 6.50% 6.50% 6.50% Tidewater 7.92% 7.92% 7.92%
Accounts Receivable	(k) Accounts Receivable Note 1 (s), COVID-19
Revenues	(l) Revenues The Company’s regulated revenue results from tariff-based sales from the provision of water and wastewater services to residential, industrial, commercial, fire-protection and wholesale customers. Residential customers are billed quarterly while most industrial, commercial, fire-protection and wholesale customers are billed monthly. Payments by customers are due between 15 to 30 days after the invoice date. Revenue is recognized as the water and wastewater services are delivered to customers as well as from accrual of unbilled revenues estimated from the last meter reading date to the end of the accounting period utilizing factors such as historical customer data, regional weather indicators and general economic conditions in the relevant service territories. Unearned Revenues and Advance Service Fees include fixed service charge billings in advance to Tidewater customers recognized as service is provided to the customer. Non-regulated service contract revenues consist of base service fees as well as fees for additional billable services provided to customers. Fees are billed monthly and are due within 30 days after the invoice date. The Company considers the amounts billed to represent the value of these services provided to customers. These contracts expire at various times through June 2030 and contain remaining performance obligations for which the Company expects to recognize revenue in the future. These contracts also contain customary termination provisions. Substantially all of the amounts included in operating revenues and accounts receivable are from contracts with customers. The Company records its allowance for doubtful accounts based on historical write-offs combined with an evaluation of current economic conditions within its service territories. The Company’s contracts do not contain any significant financing components. 48 Index The Company’s operating revenues are comprised of the following: (In Thousands) Years Ended December 31, 2021 2020 2019 Regulated Tariff Sales Residential $ 77,699 $ 76,798 $ 71,487 Commercial 16,715 15,448 15,198 Industrial 8,990 9,512 9,390 Fire Protection 12,608 12,374 12,291 Wholesale 14,590 15,187 14,319 Non-Regulated Contract Operations 12,391 12,130 11,773 Total Revenue from Contracts with Customers $ 142,993 $ 141,449 $ 134,458 Other Regulated Revenues 929 532 393 Other Non-Regulated Revenues 427 415 404 Inter-segment Elimination (1,208 ) (804 ) (657 ) Total Revenue $ 143,141 $ 141,592 $ 134,598
Unamortized Debt Expense and Premiums on Long-Term Debt	(m) Unamortized Debt Expense and Premiums on Long-Term Debt
Income Taxes	(n) Income Taxes Income Taxes
Cash and Cash Equivalents	(o) Cash and Cash Equivalents
Restricted Cash	(p) Restricted Cash
Use of Estimates	(q) Use of Estimates
Recent Accounting Pronouncements	(r) Recent Accounting Pronouncements
COVID-19 Pandemic	(s) COVID-19 Pandemic 49 Index The NJBPU and the DEPSC have approved the tracking of COVID-19 related incremental costs for potential recovery in customer rates in future rate proceedings. Neither jurisdiction has established a timetable or definitive formal procedures for seeking cost recovery. Since March 2020, the Company has increased its allowance for doubtful accounts for expected increases in accounts receivable write-offs due to the financial impact of COVID-19 on customers. The Company has not deferred any COVID-19 related incremental costs. We will continue to monitor the effects of COVID-19.
Regulatory Notice of Non-Compliance	(t) Regulatory Notice of Non-Compliance – The NJDEP standard for PFOA was developed based on a Health-based Maximum Contaminant Level (MCL) of 14 parts per trillion (ppt). Although the United States Environmental Protection Agency (USEPA) has not yet implemented an enforceable regulation relative to PFOA, the water distributed from the Park Avenue Well Field Treatment Plant does meet the USEPA’s current health advisory level of 70 parts per trillion (ppt) and would meet the NJDEP’s pre-2021 standard guidance level of 40 ppt, which was not a regulation. Construction of an enhanced treatment process at the Park Avenue Well Field Treatment Plant to comply with the NJDEP standard had already begun when the Notice was issued by the NJDEP. Since completion is not expected until mid-2023, in December 2021, the Company implemented an interim solution to meet the Notice requirements. The Park Avenue Well Field Treatment Plant was taken off-line and alternate sources of supply have been obtained. The Company is in the process of implementing an acceleration of a portion of the Park Avenue Wellfield treatment upgrades in order to meet anticipated increases in the historical higher water demand periods during the summer months and is also intended to result in compliance with the requirements of the Notice. In November 2021, the Company was served with two PFOA-related class action lawsuits seeking restitution for medical, water replacement and other claimed related costs. These lawsuits are in the early stages of the legal process and their ultimate resolution cannot be predicted at this time. The Company’s insurance provider has acknowledged coverage of potential liability resulting from these lawsuits. In 2018, the Company identified the party believed to be the source of the PFAS in the wells supplying the Park Avenue Well Field Treatment Plant and filed a lawsuit against that entity seeking compensatory damages for the resulting damage to its properties and costs to remediate PFAS, punitive damages and attorney’s fees and costs. The ultimate resolution of this matter cannot be predicted at this time. In January 2022, the Company filed a petition with the NJBPU seeking to establish a regulatory asset and deferred accounting until its next base rate setting proceeding for all costs associated with the interim solution to comply with the Notice. While the Company believes other administrative or monetary penalties are unlikely, the issuance of the Notice does not preclude the State of New Jersey or any of its agencies from initiating formal administrative and/or judicial enforcement action, including assessment of penalties of up to $25,000 per day per offense if the Company is not in compliance with the requirements of the Notice by September 7, 2022.
Sale of Subsidiary	(u) Sale of Subsidiary

Organization, Summary of Sign_3

Organization, Summary of Significant Accounting Policies and Recent Developments (Tables)	12 Months Ended
	Dec. 31, 2021
Organization Summary Of Significant Accounting Policies And Recent Developments [Abstract]
Range of depreciation rates	(g) Depreciation - Source of Supply 1.15% - 3.44% Transmission and Distribution (T&D): Pumping 2.00% - 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% Wastewater Collection 1.42% - 1.81%
Allowance for Funds Used During Construction Rates	(j) Allowance for Funds Used During Construction (AFUDC) 2021 2020 2019 Middlesex 6.50% 6.50% 6.50% Tidewater 7.92% 7.92% 7.92%
Schedule of Operating Revenues	The Company’s operating revenues are comprised of the following: (In Thousands) Years Ended December 31, 2021 2020 2019 Regulated Tariff Sales Residential $ 77,699 $ 76,798 $ 71,487 Commercial 16,715 15,448 15,198 Industrial 8,990 9,512 9,390 Fire Protection 12,608 12,374 12,291 Wholesale 14,590 15,187 14,319 Non-Regulated Contract Operations 12,391 12,130 11,773 Total Revenue from Contracts with Customers $ 142,993 $ 141,449 $ 134,458 Other Regulated Revenues 929 532 393 Other Non-Regulated Revenues 427 415 404 Inter-segment Elimination (1,208 ) (804 ) (657 ) Total Revenue $ 143,141 $ 141,592 $ 134,598

Rate and Regulatory Matters (Ta

Rate and Regulatory Matters (Tables)	12 Months Ended
	Dec. 31, 2021
Regulated Operations [Abstract]
Schedule of regulatory assets	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 2021 2020 Recovery Periods Retirement Benefits $ 24,926 $ 45,419 Various Income Taxes 70,427 66,759 Various Rate Cases, Tank Painting, and Other 5,385 5,966 2-10 years Total $ 100,738 $ 118,144

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Income tax expense reconciliation	Income tax (benefit) 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, 2021 2020 2019 Income Tax at Statutory Rate $ 6,521 $ 7,204 $ 6,457 Tax Effect of: Utility Plant Related (1,290 ) (1,356 ) (802 ) Tangible Property Repairs (12,281 ) (11,298 ) (10,156 ) State Income Taxes – Net 1,499 1,364 1,173 Other 63 (33 ) 188 Total Income Tax (Benefit) Expense $ (5,488 ) $ (4,119 ) $ (3,140 )
Income tax expense	Income tax (benefit) expense is comprised of the following: (Thousands of Dollars) Years Ended December 31, 2021 2020 2019 Current: Federal $ (8,247 ) $ (4,281 ) $ (3,822 ) State 1,467 2,598 2,246 Deferred: Federal 933 (1,490 ) (726 ) State 431 (871 ) (761 ) Investment Tax Credits (72 ) (75 ) (77 ) Total Income Tax (Benefit) Expense $ (5,488 ) $ (4,119 ) $ (3,140 )
Deferred tax liability	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, 2021 2020 Utility Plant Related $ 65,107 $ 56,868 Customer Advances (3,595 ) (3,626 ) Employee Benefits 7,091 7,339 Investment Tax Credits 373 445 Other 524 271 Total Accumulated Deferred Income Taxes $ 69,500 $ 61,297

Commitments and Contingent Li_2

Commitments and Contingent Liabilities (Tables)	12 Months Ended
	Dec. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Schedule of water cost purchased	Purchased water costs are shown below: (Millions of Dollars) Years Ended December 31, 2021 2020 2019 Untreated $ 3.3 $ 3.4 $ 3.4 Treated 3.6 3.6 3.2 Total Costs $ 6.9 $ 7.0 $ 6.6
Schedule of operating lease ROU assets and lease liabilities	Information related to operating lease ROU assets is as follows: (In Millions) December 31, 2021 2020 ROU Asset at Lease Inception $ 7.3 $ 7.3 Accumulated Amortization (2.8 ) (2.1 ) Current ROU Asset $ 4.5 $ 5.2
Schedule of future minimum operating lease	The Company’s future minimum operating lease commitments as of December 31, 2021 are as follows: (In Millions) December 31, 2021 2022 $ 0.8 2023 0.8 2024 0.8 2025 0.8 2026 0.9 Thereafter 2.9 Total Lease Payments $ 7.0 Imputed Interest (1.8 ) Present Value of Lease Payments 5.2 Less Current Portion* (0.8 ) Non-Current Lease Liability $ 4.4 * Included in Other Current Liabilities

Short-Term Borrowings (Tables)

Short-Term Borrowings (Tables)	12 Months Ended
	Dec. 31, 2021
Short-term Debt [Abstract]
Schedule of information regarding short-term borrowings	Information regarding the Company’s short-term borrowings for the years ended December 31, 2021 and 2020 is summarized below: (Millions of Dollars) 2021 2020 Average Amount Outstanding $ 23.7 $ 28.3 Weighted Average Interest Rate 1.12 % 1.55 % Notes Payable at Year-End $ 13.0 $ 2.0 Weighted Average Interest Rate at Year-End 1.04 % 1.04 %
Schedule of Line of Credit	The Company maintained lines of credit aggregating $110.0 million and $140.0 million at December 31, 2021 and 2020, respectively. (Millions) As of December 31, 2021 Line of Credit Outstanding Available Maximum Credit Type Renewal Date Bank of America $ - $ 30.0 $ 30.0 Uncommitted January 26, 2023 PNC Bank 12.0 56.0 68.0 Committed January 31, 2024 CoBank 1.0 11.0 12.0 Committed November 30, 2023 $ 13.0 $ 97.0 $ 110.0

Capitalization (Tables)

Capitalization (Tables)	12 Months Ended
	Dec. 31, 2021
CAPITALIZATION:
Schedule of maturities of long term debt	FMBs Series 2019A, 2019B, 2020A, 2021A and 2021B and the CoBank 2021 Amortizing Secured Note are term bonds with single maturity dates subsequent to 2026. The aggregate annual principal repayment obligations for all long-term debt over the next five years are shown below: Year (Millions of Dollars) Annual Maturities 2022 $ 6.7 2023 $ 16.1 2024 $ 6.0 2025 $ 5.6 2026 $ 5.4
Schedule of earnings per share	The following table presents the calculation of basic and diluted earnings per share (EPS) for the years ended December 31, 2021, 2020 and 2019. Basic EPS is computed on the basis of the weighted average number of shares outstanding. Diluted EPS assumes the conversion of both the Convertible Preferred Stock $7.00 Series and $8.00 Series (fully converted into common stock in September 2019). (In Thousands, Except Per Share Amounts) 2021 2020 2019 Basic: Income Shares Income Shares Income Shares Net Income $ 36,543 17,492 $ 38,425 17,459 $ 33,888 16,685 Preferred Dividend (120 ) (120 ) (132 ) Earnings Applicable to Common Stock $ 36,423 17,492 $ 38,305 17,459 $ 33,756 16,685 Basic EPS $ 2.08 $ 2.19 $ 2.02 Diluted: Earnings Applicable to Common Stock $ 36,423 17,492 $ 38,305 17,459 $ 33,756 16,685 $7.00 Series Dividend 67 115 67 115 67 115 $8.00 Series Dividend - - - - 12 29 Adjusted Earnings Applicable to Common Stock $ 36,490 17,607 $ 38,372 17,574 $ 33,835 16,829 Diluted EPS $ 2.07 $ 2.18 $ 2.01
Schedule of carrying amount and estimated fair value of bonds	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 FMBs issued by Middlesex 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 in the table below are classified as Level 2 measurements. The carrying amount and fair value of the Bonds were as follows: (Thousands of Dollars) At December 31, 2021 2020 Carrying Fair Carrying Fair Amount Value Amount Value FMBs $ 98,828 $ 107,781 $ 147,667 $ 159,195

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	12 Months Ended
	Dec. 31, 2021
Retirement Benefits [Abstract]
Change in projected benefit obligation and fair value of plan assets	The Company uses a December 31 measurement date for all of its employee benefit plans. The tables below set forth information relating to the Company’s Pension Plan and Other Benefits Plan for 2021 and 2020. ( Thousands of Dollars) Pension Plan Other Benefits Plan December 31, 2021 2020 2021 2020 Change in Projected Benefit Obligation: Beginning Balance $ 115,861 $ 100,891 $ 52,776 $ 55,166 Service Cost 2,696 2,434 917 993 Interest Cost 2,706 3,099 1,236 1,699 Actuarial (Gain) Loss (4,185 ) 12,585 (4,705 ) (4,279 ) Benefits Paid (3,368 ) (3,148 ) (828 ) (803 ) Ending Balance $ 113,710 $ 115,861 $ 49,396 $ 52,776 61 Index Pension Plan Other Benefits Plan December 31, 2021 2020 2021 2020 Change in Fair Value of Plan Assets: Beginning Balance $ 88,921 $ 80,380 $ 44,892 $ 40,613 Actual Return on Plan Assets 11,798 8,289 5,776 3,988 Employer Contributions 3,400 3,400 828 1,094 Benefits Paid (3,369 ) (3,148 ) (828 ) (803 ) Ending Balance $ 100,750 $ 88,921 $ 50,668 $ 44,892 Funded Status $ (12,960 ) $ (26,940 ) $ 1,272 $ (7,884 )
Amounts recognized in balance sheet	Pension Plan Other Benefits Plan December 31, 2021 2020 2021 2020 Amounts Recognized in the Consolidated Balance Sheets consist of: Current Liability $ 398 $ 398 $ - $ - Noncurrent Liability 12,562 26,542 (1,272 ) 7,884 Net Liability Recognized $ 12,960 $ 26,940 $ (1,272 ) $ 7,884
Components of net benefit cost	(Thousands of Dollars) Pension Plan Other Benefits Plan Years Ended December 31, 2021 2020 2019 2021 2020 2019 Components of Net Periodic Benefit Cost Service Cost $ 2,696 $ 2,434 $ 2,171 $ 917 $ 993 $ 839 Interest Cost 2,706 3,099 3,426 1,236 1,699 1,984 Expected Return on Plan Assets (6,225 ) (5,635 ) (4,694 ) (3,142 ) (2,853 ) (2,451 ) Amortization of Net Actuarial Loss 2,868 2,059 1,618 527 1,352 1,319 Net Periodic Benefit Cost* $ 2,045 $ 1,957 $ 2,521 $ (462 ) $ 1,191 $ 1,691 *Service cost is included in Operations and Maintenance expense on the consolidated statements of income; all other amounts are included in Other Income (Expense), net.
Amounts expected to be amortized from regulatory assets	Amounts that are expected to be amortized from Regulatory Assets into Net Periodic Benefit Cost in 2022 are as follows: (Thousands of Dollars) Pension Plan Other Benefits Plan Actuarial Loss $ 1,673 $ -
Discount and compensation rates	The discount rate and compensation increase rate for determining our postretirement benefit plans’ benefit obligations and costs as of and for the years ended December 31, 2021, 2020 and 2019, respectively, are as follows: Pension Plan Other Benefits Plan 2021 2020 2019 2021 2020 2019 Weighted Average Assumptions: Expected Return on Plan Assets 7.00 % 7.00 % 7.00 % 7.00 % 7.00 % 7.00 % Discount Rate for: Benefit Obligation 2.72 % 2.37 % 3.12 % 2.72 % 2.37 % 3.12 % Benefit Cost 2.37 % 3.12 % 4.15 % 2.37 % 3.12 % 4.15 % 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	A one-percentage point change in assumed healthcare cost trend rates would have the following effects on the Other Benefits Plan: (Thousands of Dollars) 1 Percentage Point Increase Decrease Effect on Current Year Service and Interest Costs $ 472 $ (359 ) Effect on Projected Benefit Obligation $ 7,882 $ (6,228 )
Expected benefit payments	The following benefit payments, which reflect expected future service, are expected to be paid: (Thousands of Dollars) Year Pension Plan Other Benefits Plan 2022 $ 3,735 $ 1,345 2023 3,985 1,462 2024 4,771 1,573 2025 5,179 1,675 2026 5,183 1,782 2027-2031 27,539 9,803 Totals $ 50,392 $ 17,640
Allocation of plan assets	The allocation of plan assets at December 31, 2021 and 2020 by asset category is as follows: Pension Plan Other Benefits Plan Asset Category 2021 2020 Target 2021 2020 Target Equity Securities 59.6 % 60.6 % 55 % 66.8 % 62.3 % 43 % Debt Securities 37.9 % 37.5 % 38 % 30.7 % 31.0 % 50 % Cash 1.0 % 1.2 % 2 % 2.5 % 6.7 % 2 % Real Estate/Commodities 1.5 % 0.7 % 5 % 0.0 % 0.0 % 5 % Total 100.0 % 100.0 % 100.0 % 100.0 %
Fair value of plan assets	The following tables present Middlesex’s Pension Plan assets measured and recorded at fair value within the fair value hierarchy: (Thousands of Dollars) As of December 31, 2021 Level 1 Level 2 Level 3 Total Mutual Funds $ 87,687 $ - $ - $ 87,687 Money Market Funds 1,057 - - 1,057 Common Equity Securities 12,006 - - 12,006 Total Investments $ 100,750 $ - $ - $ 100,750 (Thousands of Dollars) As of December 31, 2020 Level 1 Level 2 Level 3 Total Mutual Funds $ 76,026 $ - $ - $ 76,026 Money Market Funds 1,086 - - 1,086 Common Equity Securities 11,809 - - 11,809 Total Investments $ 88,921 $ - $ - $ 88,921 The following tables present Middlesex’s Other Benefits Plan assets measured and recorded at fair value within the fair value hierarchy: (Thousands of Dollars) As of December 31, 2021 Level 1 Level 2 Level 3 Total Mutual Funds $ 33,844 $ - $ - $ 33,844 Money Market Funds 1,291 - - 1,291 Agency/US/State/Municipal Debt - 15,533 - 15,533 Total Investments $ 35,135 $ 15,533 $ - $ 50,668 (Thousands of Dollars) As of December 31, 2020 Level 1 Level 2 Level 3 Total Mutual Funds $ 27,408 $ - $ - $ 27,408 Money Market Funds 3,696 - - 3,696 Agency/US/State/Municipal Debt - 13,788 - 13,788 Total Investments $ 31,104 $ 13,788 $ - $ 44,892
Restricted stock plan	The following table presents awarded but not yet vested share information for the plan: Shares (thousands) Unearned Compensation (thousands) Weighted Average Grant Price Balance, January 1, 2019 125 $ 1,638 Granted 18 975 $ 55.99 Vested (28 ) - Forfeited (18 ) - Amortization of Compensation Expense - (907 ) Balance, December 31, 2019 97 $ 1,706 Granted 16 982 $ 60.12 Vested (27 ) - Amortization of Compensation Expense - (851 ) Balance, December 31, 2020 86 $ 1,837 Granted 15 1,151 $ 79.02 Vested (18 ) - Amortization of Compensation Expense - (1,057 ) Balance, December 31, 2021 83 $ 1,931

Business Segment Data (Tables)

Business Segment Data (Tables)	12 Months Ended
	Dec. 31, 2021
Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment	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: 2021 2020 2019 Revenues: Regulated $ 131,531 $ 129,851 $ 123,078 Non – Regulated 12,818 12,545 12,177 Inter-segment Elimination (1,208 ) (804 ) (657 ) Consolidated Revenues $ 143,141 $ 141,592 $ 134,598 Operating Income: Regulated $ 29,577 $ 34,043 $ 31,805 Non – Regulated 3,634 3,377 3,715 Consolidated Operating Income $ 33,211 $ 37,420 $ 35,520 Depreciation: Regulated $ 20,897 $ 18,264 $ 16,481 Non – Regulated 212 208 235 Consolidated Depreciation $ 21,109 $ 18,472 $ 16,716 Other Income (Expense), Net: Regulated $ 6,112 $ 4,605 $ 3,018 Non – Regulated 279 130 (253 ) Inter-segment Elimination (433 ) (356 ) (273 ) Consolidated Other Income (Expense), Net $ 5,958 $ 4,379 $ 2,492 Interest Charges: Regulated $ 8,529 $ 7,780 $ 7,456 Non – Regulated 17 70 81 Inter-segment Elimination (432 ) (357 ) (273 ) Consolidated Interest Charges $ 8,114 $ 7,493 $ 7,264 Income Taxes: Regulated $ (6,723 ) $ (5,139 ) $ (4,317 ) Non – Regulated 1,235 1,020 1,177 Consolidated Income Taxes $ (5,488 ) $ (4,119 ) $ (3,140 ) Net Income: Regulated $ 33,849 $ 35,951 $ 31,602 Non – Regulated 2,694 2,474 2,286 Consolidated Net Income $ 36,543 $ 38,425 $ 33,888 Capital Expenditures: Regulated $ 79,195 $ 105,091 $ 88,858 Non – Regulated 183 528 267 Total Capital Expenditures $ 79,378 $ 105,619 $ 89,125 67 Index (Thousands of Dollars) As of As of December 31, 2021 December 31, 2020 Assets: Regulated $ 1,022,116 $ 998,932 Non – Regulated 7,811 8,289 Inter-segment Elimination (9,912 ) (30,751 ) Consolidated Assets $ 1,020,015 $ 976,470

Quarterly Data - Unaudited (Tab

Quarterly Data - Unaudited (Tables)	12 Months Ended
	Dec. 31, 2021
Quarterly Financial Information Disclosure [Abstract]
Quarterly financial information	Financial information for each quarter of 2021 and 2020 is as follows: (Thousands of Dollars, Except per Share Data) 2021 1 st 2 nd 3 rd 4 th Total Operating Revenues $ 32,541 $ 36,701 $ 39,874 $ 34,025 $ 143,141 Operating Income 5,634 9,814 11,424 6,339 33,211 Net Income 6,907 10,923 11,476 7,237 36,543 Basic Earnings per Share $ 0.39 $ 0.62 $ 0.65 $ 0.42 $ 2.08 Diluted Earnings per Share $ 0.39 $ 0.62 $ 0.65 $ 0.41 $ 2.07 Common Dividend Per Share $ 0.2725 $ 0.2725 $ 0.2725 $ 0.2900 $ 1.1075 High/Low Common Stock Price $ 85.92/$67.09 $ 88.61/$77.31 $ 116.40/$81.02 $ 119.37/$98.12 2020 1 st 2 nd 3 rd 4 th Total Operating Revenues $ 31,769 $ 35,277 $ 39,920 $ 34,626 $ 141,592 Operating Income 6,527 9,385 13,177 8,331 37,420 Net Income 7,668 9,713 12,737 8,307 38,425 Basic Earnings per Share $ 0.44 $ 0.55 $ 0.73 $ 0.47 $ 2.19 Diluted Earnings per Share $ 0.44 $ 0.55 $ 0.72 $ 0.47 $ 2.18 Common Dividend Per Share $ 0.2563 $ 0.2563 $ 0.2563 $ 0.2725 $ 1.0414 High/Low Common Stock Price $ 69.92/$48.79 $ 72.41/$53.70 $ 69.89/$59.61 $ 76.08/$61.81

Organization, Summary of Sign_4

Organization, Summary of Significant Accounting Policies and Recent Developments (Narrative) (Details) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	Aug. 31, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Organization, Summary Of Significant Accounting Policies And Recent Developments [Line Items]
Percent voting interest		50.00%
Percent of operating revenues		91.00%
Percent of total assets		99.00%
Allowance for doubtful accounts		$ 2.6	$ 2.1
Bad debt expense		0.9	1.1	$ 1
Write-offs		$ 0.4	$ 0.5	$ 0.6
Artesian Wastewater Management, Inc [Member]
Organization, Summary Of Significant Accounting Policies And Recent Developments [Line Items]
Percentage of interest acquired	100.00%
Common stock acquired	$ 6.4
Minimum [Member]
Organization, Summary Of Significant Accounting Policies And Recent Developments [Line Items]
Estimated useful lives of non-regulated fixed assets		3 years
Maximum [Member]
Organization, Summary Of Significant Accounting Policies And Recent Developments [Line Items]
Estimated useful lives of non-regulated fixed assets		42 years

Organization, Summary of Sign_5

Organization, Summary of Significant Accounting Policies and Recent Developments (Schedule of Depreciation Rates) (Details)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
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	2.00%	2.00%	2.00%
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%
Wastewater Collection [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	1.42%	1.42%	1.42%
Wastewater Collection [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	1.81%	1.81%	1.81%
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 Sign_6

Organization, Summary of Significant Accounting Policies and Recent Developments (Schedule of AFUDC Rates) (Details)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Middlesex [Member]
Organization, Summary Of Significant Accounting Policies And Recent Developments [Line Items]
Allowance for Funds Used During Construction Rates	6.50%	6.50%	6.50%
Tidewater [Member]
Organization, Summary Of Significant Accounting Policies And Recent Developments [Line Items]
Allowance for Funds Used During Construction Rates	7.92%	7.92%	7.92%

Organization, Summary of Sign_7

Organization, Summary of Significant Accounting Policies and Recent Developments (Schedule of Operating Revenues) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Regulated Tariff Sales
Residential									$ 77,699	$ 76,798	$ 71,487
Commercial									16,715	15,448	15,198
Industrial									8,990	9,512	9,390
Fire Protection									12,608	12,374	12,291
Wholesale									14,590	15,187	14,319
Non-Regulated Contract Operations									12,391	12,130	11,773
Total Revenue from Contracts with Customers									142,993	141,449	134,458
Other Regulated Revenues									929	532	393
Other Non-Regulated Revenues									427	415	404
Inter-segment Elimination									(1,208)	(804)	(657)
Total Revenue	$ 34,025	$ 39,874	$ 36,701	$ 32,541	$ 34,626	$ 39,920	$ 35,277	$ 31,769	$ 143,141	$ 141,592	$ 134,598

Rate and Regulatory Matters (Na

Rate and Regulatory Matters (Narrative) (Details) - USD ($) $ in Thousands	Jan. 02, 2023	Jan. 02, 2022	Nov. 04, 2019	Mar. 01, 2019	Dec. 31, 2021	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Nov. 30, 2021
Regulatory Liabilities [Line Items]
Corporate tax rate				3.35%
Regulatory liabilities					$ 30,400			$ 30,400	$ 31,000
Deferred income tax benefits								$ (10,989)	(13,490)	$ (11,719)
Maximum [Member]
Regulatory Liabilities [Line Items]
Corporate tax rate								35.00%
Minimum [Member]
Regulatory Liabilities [Line Items]
Corporate tax rate								21.00%
Middlesex [Member] | Within 30 Days [Member]
Regulatory Liabilities [Line Items]
Escrow deposit											$ 1,700
Tidewater [Member]
Regulatory Liabilities [Line Items]
Proceeds from net of tax refunds						$ 800
Maturity date								Mar. 31, 2046
Delaware Public Service Commission [Member]
Regulatory Liabilities [Line Items]
Percentage of consumer price index								3.00%
Maturity date								Dec. 31, 2029
Delaware Public Service Commission [Member] | Tidewater [Member]
Regulatory Liabilities [Line Items]
Approved increase in annual operating revenues									600
New Jersey Board Of Public Utilities [Member] | Pinelands Wastewater [Member]
Regulatory Liabilities [Line Items]
Approved increase in annual operating revenues			$ 500
New Jersey Board Of Public Utilities [Member] | Middlesex [Member]
Regulatory Liabilities [Line Items]
Approved increase in annual operating revenues					27,700
Base rate amount					$ 513,500
Return on equity					9.60%
Regulatory liabilities					$ 3,000			$ 3,000	$ 14,900
New Jersey Board Of Public Utilities [Member] | Middlesex [Member] | Scenario Forecast [Member]
Regulatory Liabilities [Line Items]
Approved increase in annual operating revenues	$ 7,000
New Jersey Board Of Public Utilities [Member] | Middlesex [Member] | Subsequent Event [Member]
Regulatory Liabilities [Line Items]
Approved increase in annual operating revenues		$ 20,700
New Jersey Board Of Public Utilities [Member] | Middlesex [Member]
Regulatory Liabilities [Line Items]
Approved increase in annual operating revenues						$ 1,100	$ 600

Rate and Regulatory Matters (Sc

Rate and Regulatory Matters (Schedule of Regulatory Assets) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Regulatory Assets [Line Items]
Regulatory Assets	$ 100,738	$ 118,144
Retirement Benefits [Member]
Regulatory Assets [Line Items]
Regulatory Assets	$ 24,926	$ 45,419
Remaining recovery period	Various	Various
Income Taxes [Member]
Regulatory Assets [Line Items]
Regulatory Assets	$ 70,427	$ 66,759
Remaining recovery period	Various	Various
Rate Cases, Tank Painting, and Other [Member]
Regulatory Assets [Line Items]
Regulatory Assets	$ 5,385	$ 5,966
Remaining recovery period	2-10 years	2-10 years

Income Taxes (Schedule of Incom

Income Taxes (Schedule of Income Tax Expense Reconciliation) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Income Tax at Statutory Rate	$ 6,521	$ 7,204	$ 6,457
Tax Effect of:
Utility Plant Related	(1,290)	(1,356)	(802)
Tangible Property Repairs	(12,281)	(11,298)	(10,156)
State Income Taxes - Net	1,499	1,364	1,173
Other	63	(33)	188
Total Income Tax (Benefit) Expense	$ (5,488)	$ (4,119)	$ (3,140)

Income Taxes (Schedule of Inc_2

Income Taxes (Schedule of Income Tax Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Current:
Federal	$ (8,247)	$ (4,281)	$ (3,822)
State	1,467	2,598	2,246
Deferred:
Federal	933	(1,490)	(726)
State	431	(871)	(761)
Investment Tax Credits	(72)	(75)	(77)
Total Income Tax (Benefit) Expense	$ (5,488)	$ (4,119)	$ (3,140)

Income Taxes (Schedule of Net D

Income Taxes (Schedule of Net Deferred Tax Liability) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Utility Plant Related	$ 65,107	$ 56,868
Customer Advances	(3,595)	(3,626)
Employee Benefits	7,091	7,339
Investment Tax Credits	373	445
Other	524	271
Total Deferred Tax Liability and ITC	$ 69,500	$ 61,297

Income Taxes (Narrative) (Detai

Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating Loss Carryforwards [Line Items]
Income taxes Paid	$ (5,488)	$ (4,119)	$ (3,140)
Tax Year 2014 Through 2017 [Member]
Operating Loss Carryforwards [Line Items]
Interest expense	500		100
Income taxes Paid	$ 200		$ 2,700

Commitments and Contingent Li_3

Commitments and Contingent Liabilities (Narrative) (Details) gal in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2021USD ($)gal	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)
Commitment And Contingencies [Line Items]
Budgeted construction cost for construction program, 2022	$ 88
Budgeted construction cost for construction program, 2023	83
Budgeted construction cost for construction program, 2024	58
Rental expenses under operating leases	0.8	$ 0.8	$ 0.7
Estimated obligation expend	$ 34
Estimated incremental borrowing rate	4.03%
Lease maturity date	2030
NJ Water Supply Authority [Member]
Commitment And Contingencies [Line Items]
Purchase commitment expiration date of contract	Nov. 30, 2023
Water purchase per commitment | gal	27
Regulated Water Authority [Member]
Commitment And Contingencies [Line Items]
Purchase commitment expiration date of contract	Feb. 27, 2026
Water purchase per commitment | gal	3
City of Dover [Member]
Commitment And Contingencies [Line Items]
Water purchase per commitment | gal	15

Commitments and Contingent Li_4

Commitments and Contingent Liabilities (Schedule of Purchased Water Costs) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Purchased Water
Untreated	$ 3.3	$ 3.4	$ 3.4
Treated	3.6	3.6	3.2
Total Costs	$ 6.9	$ 7	$ 6.6

Commitments and Contingent Li_5

Commitments and Contingent Liabilities (Schedule of Operating Lease ROU Assets and Lease Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
ROU Asset at Lease Inception	$ 7.3	$ 7.3
Accumulated Amortization	(2.8)	(2.1)
Current ROU Asset	$ 4.5	$ 5.2

Commitments and Contingent Li_6

Commitments and Contingent Liabilities (Schedule of Future Minimum Operating Lease) (Details) $ in Millions	Dec. 31, 2021USD ($)
Commitments and Contingencies Disclosure [Abstract]
2022	$ 0.8
2023	0.8
2024	0.8
2025	0.8
2026	0.9
Thereafter	2.9
Total Lease Payments	7
Imputed Interest	(1.8)
Present Value of Lease Payments	5.2
Less Current Portion	(0.8)	[1]
Non-Current Lease Liability	$ 4.4
[1]	Included in Other Current Liabilities

Short-term Borrowings (Narrativ

Short-term Borrowings (Narrative) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Short-term Debt [Abstract]
Maximum Lines of credit	$ 110	$ 140
Lines of credit	60
Increase line of credit	$ 140

Short Term Borrowings (Schedule

Short Term Borrowings (Schedule of Weighted Average Daily Amounts of Borrowings Outstanding) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Lines Of Credit Facility
Average Outstanding	$ 23.7	$ 28.3
Weighted Average Interest Rate	1.12%	1.55%
Notes Payable at Year-End	$ 13	$ 2
Weighted Average Interest Rate at Year-End	1.04%	1.04%

Short-term Borrowings (Schedule

Short-term Borrowings (Schedule of Line of Credit) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Line of Credit Facility [Line Items]
Outstanding	$ 13
Available	97
Maximum	110	$ 140
Bank of America [Member]
Line of Credit Facility [Line Items]
Outstanding
Available	30
Maximum	$ 30
Credit Type	Uncommitted
Renewal Date	Jan. 26, 2023
PNC Bank [Member]
Line of Credit Facility [Line Items]
Outstanding	$ 12
Available	56
Maximum	$ 68
Credit Type	Committed
Renewal Date	Jan. 31, 2024
CoBank [Member]
Line of Credit Facility [Line Items]
Outstanding	$ 1
Available	11
Maximum	$ 12
Credit Type	Committed
Renewal Date	Nov. 30, 2023

Capitalization (Narrative) (Det

Capitalization (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands

1 Months Ended

12 Months Ended

Feb. 25, 2022

Nov. 30, 2021

Nov. 30, 2020

Nov. 30, 2019

May 31, 2019

Feb. 28, 2019

Dec. 31, 2021

Dec. 31, 2020

Dec. 31, 2019

Jun. 30, 2021

Aug. 31, 2019

Apr. 30, 2019

Dec. 31, 2018

Sep. 30, 2018

Aug. 31, 2018

Mar. 31, 2018

Schedule of Capitalization [Line Items]

Issuance of Common Stock

$ 43,700

Public offering, price per share

$ 60.50

Issuance of Common Stock in a public offering, shares

800,000

Additional Shares Authorized By SEC To Be Issued

300,000

Preferred Stock, Shares Authorized

120,000

120,000

Preferred Stock, Shares Outstanding

20,000

20,000

Long-term debt

$ 311,146

$ 277,241

Other long term debt

212,300

129,600

Customer advances

23,529

23,404

First Mortgage Bonds - Series 2019A [Member]

Schedule of Capitalization [Line Items]

Long-term debt

$ 32,500

Interest rate

4.00%

First Mortgage Bonds - Series 2019B [Member]

Schedule of Capitalization [Line Items]

Long-term debt

$ 21,200

Interest rate

5.00%

All Long-term Debt [Member]

Schedule of Capitalization [Line Items]

Weighted average interest rate

2.83%

3.02%

First Mortgage Bonds - Series 2020A [Member]

Schedule of Capitalization [Line Items]

Long-term debt

$ 40,000

First Mortgage Bonds - Series 2021 [Member]

Schedule of Capitalization [Line Items]

Long-term debt

65,000

Private placement loan [Member]

Schedule of Capitalization [Line Items]

Percentage of principal with stated interest rate

2.90%

Proceeds from private placement

$ 45,500

Maturity date

Nov. 30, 2051

Delaware State Revolving Fund [Member]

Schedule of Capitalization [Line Items]

Maximum borrowing amount

$ 900

Delaware State Revolving Fund [Member]

Schedule of Capitalization [Line Items]

Maximum borrowing amount

$ 10,000

Maximum borrowing capacity, construction loan

$ 5,000

$ 1,700

Long-term debt

7,500

Maturity date

Nov. 30, 2044

Series 2018A [Member]

Schedule of Capitalization [Line Items]

Proceeds from issuance of first mortgage bond

$ 7,100

Amortizing Secured Notes [Member]

Schedule of Capitalization [Line Items]

Long-term debt

47,600

New Jersey Economic Development Authority [Member]

Schedule of Capitalization [Line Items]

Long-term debt

$ 63,600

New Jersey Infrastructure Bank [Member]

Schedule of Capitalization [Line Items]

Maximum borrowing capacity, construction loan

$ 8,700

$ 43,500

Percentage of principal with stated interest rate

75.00%

Percentage of principal with market interest rate

25.00%

Long-term debt

$ 87,400

Interest rate

0.00%

Construction Loan [Member]

Schedule of Capitalization [Line Items]

Interest rate

0.00%

FMB [Member]

Schedule of Capitalization [Line Items]

Percentage of principal with stated interest rate

2.79%

2.90%

Proceeds from private placement

$ 19,500

$ 40,000

Maturity date

Nov. 30, 2041

Nov. 30, 2050

Amount of maximum redeem martgage bonds

$ 45,500

FMB [Member] | Series RR [Member]

Schedule of Capitalization [Line Items]

Amount of maximum redeem martgage bonds

22,500

FMB [Member] | Series SS [Member]

Schedule of Capitalization [Line Items]

Amount of maximum redeem martgage bonds

$ 23,000

New Jersey Board Of Public Utilities [Member]

Schedule of Capitalization [Line Items]

Proceeds from issuance of first mortgage bond

$ 100,000

Maturity date

Dec. 31, 2023

Tidewater [Member]

Schedule of Capitalization [Line Items]

Percentage of principal with stated interest rate

3.94%

Maturity date

Mar. 31, 2046

Other long term debt

$ 20,000

First Mortgage Bonds [Member]

Schedule of Capitalization [Line Items]

Maximum borrowing capacity, construction loan

$ 60,800

$ 53,700

New Jersey Economic Development Authority [Member]

Schedule of Capitalization [Line Items]

Proceeds from issuance of first mortgage bond

$ 140,000

Maturity date

Dec. 31, 2022

Convertible Preferred Stock $7.00 Series [Member]

Schedule of Capitalization [Line Items]

Percentage of stock that may be redeemed in a given calander year

10.00%

Outside Director Stock Compensation Plan [Member]

Schedule of Capitalization [Line Items]

Issuance of Common Stock

$ 12,700

Common stock granted and issued under plan

3,444

4,074

3,521

Maximum number of shares authorized for grant

100,000

Shares remain available for future awards

49,125

Preferred Stock, Shares Authorized

120,000

120,000

Preferred Stock, Shares Outstanding

21,000

21,000

Dividend Reinvestment and Common Stock Purchase Plan [Member]

Schedule of Capitalization [Line Items]

Issuance of Common Stock

$ 3,800

Percentage of discount purchase of common stock in investment plan

3.00%

Number of shares offering for discount

200,000

Dividend Reinvestment and Common Stock Purchase Plan [Member] | Subsequent Event [Member]

Schedule of Capitalization [Line Items]

Number of shares offering for discount

44,323

Capitalization (Schedule of Mat

Capitalization (Schedule of Maturities of Long-term Debt) (Details) $ in Millions	Dec. 31, 2021USD ($)
CAPITALIZATION:
2022	$ 6.7
2023	16.1
2024	6
2025	5.6
2026	$ 5.4

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, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Basic:
Net Income	$ 7,237	$ 11,476	$ 10,923	$ 6,907	$ 8,307	$ 12,737	$ 9,713	$ 7,668	$ 36,543	$ 38,425	$ 33,888
Preferred Dividend									(120)	(120)	(132)
Earnings Applicable to Common Stock									$ 36,423	$ 38,305	$ 33,756
Weighted-average number of basic shares outstanding, shares									17,492	17,459	16,685
Basic EPS	$ 0.42	$ 0.65	$ 0.62	$ 0.39	$ 0.47	$ 0.73	$ 0.55	$ 0.44	$ 2.08	$ 2.19	$ 2.02
Diluted:
$7.00 Series Preferred Dividend									$ 67	$ 67	$ 67
$8.00 Series Preferred Dividend											12
Adjusted Earnings Applicable to Common Stock									$ 36,490	$ 38,372	$ 33,835
Incremental common shares attributable to $7.00 series preferred shares, shares									115	115	115
Incremental common shares attributable to $8.00 series preferred shares, shares											29
Weighted-average diluted shares outstanding, shares									17,607	17,574	16,829
Diluted EPS	$ 0.41	$ 0.65	$ 0.62	$ 0.39	$ 0.47	$ 0.72	$ 0.55	$ 0.44	$ 2.07	$ 2.18	$ 2.01

Capitalization (Schedule of Car

Capitalization (Schedule of Carrying Amount and Fair Value of Bonds) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Carrying amount [Member]
Bonds	$ 98,828	$ 147,667
Fair value [Member]
Bonds	$ 107,781	$ 159,195

Employee Benefit Plans (Narrati

Employee Benefit Plans (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation	$ 100.4	$ 101.7
Increase (decrease) in annual rate per capita cost of covered healthcare benefits, next year	7.50%
Increase (decrease) in annual rate per capita cost of covered healthcare benefits, 2023-2028	0.50%
Increase (decrease) in annual rate per capita cost of covered healthcare benefits, 2028	4.50%
Number of hours required to participate in contribution plan	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	$ 0.7	0.7	$ 0.7
Discretionary contributions, percent	5.00%
Discretionary contributions	$ 0.8	$ 0.7	$ 0.7
Maximum number of shares authorized for grant	300,000
Equity Securities [Member] | Middlesex [Member]
Defined Benefit Plan Disclosure [Line Items]
Allocation of plan assets	0.00%	1.60%
Common stock in plan, value	$ 0	$ 1.4
Other Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Allocation of plan assets	100.00%	100.00%
Benfit plan, Cash contributions	$ 0.8
Other Benefits Plan [Member] | Scenario Forecast [Member]
Defined Benefit Plan Disclosure [Line Items]
Benfit plan, Cash contributions	$ 0.8
Pension Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Allocation of plan assets	100.00%	100.00%
Benfit plan, Cash contributions	$ 3.4
Pension Benefit Plan [Member] | Scenario Forecast [Member]
Defined Benefit Plan Disclosure [Line Items]
Benfit plan, Cash contributions	$ 3.4

Employee Benefit Plans (Schedul

Employee Benefit Plans (Schedule of Change in Projected Benefit Obligation) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Pension Benefit Plan [Member]
Change in Projected Benefit Obligation:
Beginning Balance	$ 115,861	$ 100,891
Service Cost	2,696	2,434	$ 2,171
Interest Cost	2,706	3,099	3,426
Actuarial (Gain) Loss	(4,185)	12,585
Benefits Paid	(3,368)	(3,148)
Ending Balance	113,710	115,861	100,891
Other Benefits Plan [Member]
Change in Projected Benefit Obligation:
Beginning Balance	52,776	55,166
Service Cost	917	993	839
Interest Cost	1,236	1,699	1,984
Actuarial (Gain) Loss	(4,705)	(4,279)
Benefits Paid	(828)	(803)
Ending Balance	$ 49,396	$ 52,776	$ 55,166

Employee Benefit Plans (Sched_2

Employee Benefit Plans (Schedule of Change in Fair Value of Plan Assets) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Pension Benefit Plan [Member]
Change in Fair Value of Plan Assets:
Beginning Balance	$ 88,921	$ 80,380
Actual Return on Plan Assets	11,798	8,289
Employer Contributions	3,400	3,400
Benefits Paid	(3,369)	(3,148)
Ending Balance	100,750	88,921
Funded Status	(12,960)	(26,940)
Other Benefits Plan [Member]
Change in Fair Value of Plan Assets:
Beginning Balance	44,892	40,613
Actual Return on Plan Assets	5,776	3,988
Employer Contributions	828	1,094
Benefits Paid	(828)	(803)
Ending Balance	50,668	44,892
Funded Status	$ 1,272	$ (7,884)

Employee Benefit Plans (Sched_3

Employee Benefit Plans (Schedule of Employee Benefit Plans Recognized in Balance Sheet) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Pension Benefit Plan [Member]
Current Liability	$ 398	$ 398
Noncurrent Liability (Assets)	12,562	26,542
Net Liability (Asset) Recognized	12,960	26,940
Other Benefits Plan [Member]
Current Liability
Noncurrent Liability (Assets)	(1,272)	7,884
Net Liability (Asset) Recognized	$ (1,272)	$ 7,884

Employee Benefit Plans (Sched_4

Employee Benefit Plans (Schedule of Periodic Costs For Employee Retirement Benefit Plans) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Pension Benefit Plan [Member]
Periodic costs for employee retirement benefit plans
Service Cost		$ 2,696	$ 2,434	$ 2,171
Interest Cost		2,706	3,099	3,426
Expected Return on Plan Assets		(6,225)	(5,635)	(4,694)
Amortization of Net Actuarial Loss		2,868	2,059	1,618
Net Periodic Benefit Cost	[1]	2,045	1,957	2,521
Other Benefits Plan [Member]
Periodic costs for employee retirement benefit plans
Service Cost		917	993	839
Interest Cost		1,236	1,699	1,984
Expected Return on Plan Assets		(3,142)	(2,853)	(2,451)
Amortization of Net Actuarial Loss		527	1,352	1,319
Net Periodic Benefit Cost	[1]	$ (462)	$ 1,191	$ 1,691
[1]	Service cost is included in Operations and Maintenance expense on the consolidated statements of income; all other amounts are included in Other Income (Expense), net.

Employee Benefit Plans (Sched_5

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, 2021USD ($)
Pension Benefit Plan [Member]
Actuarial Loss	$ 1,673
Other Benefits Plan [Member]
Actuarial Loss

Employee Benefit Plans (Sched_6

Employee Benefit Plans (Schedule of Discount and Compensation Rates) (Details)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Pension Benefit Plan [Member]
Weighted Average Assumptions:
Expected Return on Plan Assets	7.00%	7.00%	7.00%
Discount Rate for:
Benefit Obligation	2.72%	2.37%	3.12%
Benefit Cost	2.37%	3.12%	4.15%
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	7.00%	7.00%	7.00%
Discount Rate for:
Benefit Obligation	2.72%	2.37%	3.12%
Benefit Cost	2.37%	3.12%	4.15%
Compensation Increase for:
Benefit Obligation	3.00%	3.00%	3.00%
Benefit Cost	3.00%	3.00%	3.00%

Employee Benefit Plans (Sched_7

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, 2021USD ($)
Pension Benefit Plan [Member]
Effect on Current Year Service and Interest Costs - Increase	$ 472
Effect on Projected Benefit Obligation - Increase	7,882
Other Benefits Plan [Member]
Effect on Current Year Service and Interest Costs - Decrease	(359)
Effect on Projected Benefit Obligation - Decrease	$ (6,228)

Employee Benefit Plans (Sched_8

Employee Benefit Plans (Schedule of Expected Benefit Payments) (Details) $ in Thousands	Dec. 31, 2021USD ($)
Pension Benefit Plan [Member]
2022	$ 3,735
2023	3,985
2024	4,771
2025	5,179
2026	5,183
2027-2031	27,539
Totals	50,392
Other Benefits Plan [Member]
2022	1,345
2023	1,462
2024	1,573
2025	1,675
2026	1,782
2027-2031	9,803
Totals	$ 17,640

Employee Benefit Plans (Sched_9

Employee Benefit Plans (Schedule of Allocation of Plan Assets) (Details)	Dec. 31, 2021	Dec. 31, 2020
Pension Benefit Plan [Member]
Allocation of plan assets	100.00%	100.00%
Pension Benefit Plan [Member] | Commodities [Member]
Allocation of plan assets	1.50%	0.70%
Target plan allocations	5.00%
Pension Benefit Plan [Member] | Cash [Member]
Allocation of plan assets	1.00%	1.20%
Target plan allocations	2.00%
Pension Benefit Plan [Member] | Debt Securities [Member]
Allocation of plan assets	37.90%	37.50%
Target plan allocations	38.00%
Pension Benefit Plan [Member] | Equity Securities [Member]
Allocation of plan assets	59.60%	60.60%
Target plan allocations	55.00%
Other Benefits Plan [Member]
Allocation of plan assets	100.00%	100.00%
Other Benefits Plan [Member] | Commodities [Member]
Allocation of plan assets	0.00%	0.00%
Target plan allocations	5.00%
Other Benefits Plan [Member] | Cash [Member]
Allocation of plan assets	2.50%	6.70%
Target plan allocations	2.00%
Other Benefits Plan [Member] | Debt Securities [Member]
Allocation of plan assets	30.70%	31.00%
Target plan allocations	50.00%
Other Benefits Plan [Member] | Equity Securities [Member]
Allocation of plan assets	66.80%	62.30%
Target plan allocations	43.00%

Employee Benefit Plans (Sche_10

Employee Benefit Plans (Schedule of Fair Value of Pension Plan Assets) (Details) - Pension Benefit Plan [Member] - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Fair value of plan assets	$ 100,750	$ 88,921
Mutual Funds [Member]
Fair value of plan assets	87,687	76,026
Money Market Funds [Member]
Fair value of plan assets	1,057	1,086
Equity Securities [Member]
Fair value of plan assets	12,006	11,809
Fair Value, Level 1 [Member]
Fair value of plan assets	100,750	88,921
Fair Value, Level 1 [Member] | Mutual Funds [Member]
Fair value of plan assets	87,687	76,026
Fair Value, Level 1 [Member] | Money Market Funds [Member]
Fair value of plan assets	1,057	1,086
Fair Value, Level 1 [Member] | Equity Securities [Member]
Fair value of plan assets	12,006	11,809
Fair Value, Level 2 [Member]
Fair value of plan assets
Fair Value, Level 2 [Member] | Mutual Funds [Member]
Fair value of plan assets
Fair Value, Level 2 [Member] | Money Market Funds [Member]
Fair value of plan assets
Fair Value, Level 2 [Member] | Equity Securities [Member]
Fair value of plan assets
Fair Value, Level 3 [Member]
Fair value of plan assets
Fair Value, Level 3 [Member] | Equity Securities [Member]
Fair value of plan assets
Fair Value, Level 3 [Member] | Mutual Funds [Member]
Fair value of plan assets
Fair Value, Level 3 [Member] | Money Market Funds [Member]
Fair value of plan assets

Employee Benefit Plans (Sche_11

Employee Benefit Plans (Schedule of Fair Value of Other Benefits Plan Assets) (Details) - Other Benefits Plan [Member] - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Fair value of plan assets	$ 50,668	$ 44,892
Debt Securities [Member]
Fair value of plan assets	15,533	13,788
Money Market Funds [Member]
Fair value of plan assets	1,291	3,696
Mutual Funds [Member]
Fair value of plan assets	33,844	27,408
Fair Value, Level 1 [Member]
Fair value of plan assets	35,135	31,104
Fair Value, Level 1 [Member] | Debt Securities [Member]
Fair value of plan assets
Fair Value, Level 1 [Member] | Money Market Funds [Member]
Fair value of plan assets	1,291	3,696
Fair Value, Level 1 [Member] | Mutual Funds [Member]
Fair value of plan assets	33,844	27,408
Fair Value, Level 2 [Member]
Fair value of plan assets	15,533	13,788
Fair Value, Level 2 [Member] | Debt Securities [Member]
Fair value of plan assets	15,533	13,788
Fair Value, Level 2 [Member] | Money Market Funds [Member]
Fair value of plan assets
Fair Value, Level 2 [Member] | Mutual Funds [Member]
Fair value of plan assets
Fair Value, Level 3 [Member]
Fair value of plan assets
Fair Value, Level 3 [Member] | Debt Securities [Member]
Fair value of plan assets
Fair Value, Level 3 [Member] | Money Market Funds [Member]
Fair value of plan assets
Fair Value, Level 3 [Member] | Mutual Funds [Member]
Fair value of plan assets

Employee Benefit Plans (Sche_12

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, 2021	Dec. 31, 2020	Dec. 31, 2019
Shares
Balance	86	97	125
Granted	15	16	18
Vested	(18)	(27)	(28)
Forfeited			(18)
Amortization of Compensation Expense
Balance	83	86	97
Unearned compensation
Balance	$ 1,837	$ 1,706	$ 1,638
Granted	1,151	982	975
Vested
Forfeited
Amortization of Compensation Expense	(1,057)	(851)	(907)
Balance	$ 1,931	$ 1,837	$ 1,706
Weighted Average Grant Price
Granted	$ 79.02	$ 60.12	$ 55.99

Business Segment Data (Details)

Business Segment Data (Details) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2021USD ($)	Sep. 30, 2021USD ($)	Jun. 30, 2021USD ($)	Mar. 31, 2021USD ($)	Dec. 31, 2020USD ($)	Sep. 30, 2020USD ($)	Jun. 30, 2020USD ($)	Mar. 31, 2020USD ($)	Dec. 31, 2021USD ($)	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)
Segment Reporting Information [Line Items]
Number of Reportable Segments									2
Revenues	$ 34,025	$ 39,874	$ 36,701	$ 32,541	$ 34,626	$ 39,920	$ 35,277	$ 31,769	$ 143,141	$ 141,592	$ 134,598
Operating Income	6,339	11,424	9,814	5,634	8,331	13,177	9,385	6,527	33,211	37,420	35,520
Depreciation									21,109	18,472	16,716
Other Income (Expense), Net									5,958	4,379	2,492
Interest Expense									8,114	7,493	7,264
Income Taxes									(5,488)	(4,119)	(3,140)
Net Income	7,237	$ 11,476	$ 10,923	$ 6,907	8,307	$ 12,737	$ 9,713	$ 7,668	36,543	38,425	33,888
Capital Expenditures									79,378	105,619	89,125
Assets	1,020,015				976,470				1,020,015	976,470
Non - Regulated [Member]
Segment Reporting Information [Line Items]
Revenues									12,818	12,545	12,177
Operating Income									3,634	3,377	3,715
Depreciation									212	208	235
Other Income (Expense), Net									279	130	(253)
Interest Expense									17	70	81
Income Taxes									1,235	1,020	1,177
Net Income									2,694	2,474	2,286
Capital Expenditures									183	528	267
Assets	7,811				8,289				7,811	8,289
Regulated [Member]
Segment Reporting Information [Line Items]
Revenues									131,531	129,851	123,078
Operating Income									29,577	34,043	31,805
Depreciation									20,897	18,264	16,481
Other Income (Expense), Net									6,112	4,605	3,018
Interest Expense									8,529	7,780	7,456
Income Taxes									(6,723)	(5,139)	(4,317)
Net Income									33,849	35,951	31,602
Capital Expenditures									79,195	105,091	88,858
Assets	1,022,116				998,932				1,022,116	998,932
Inter-segment Elimination [Member]
Segment Reporting Information [Line Items]
Revenues									(1,208)	(804)	(657)
Other Income (Expense), Net									(433)	(356)	(273)
Interest Expense									(432)	(357)	$ (273)
Assets	$ (9,912)				$ (30,751)				$ (9,912)	$ (30,751)

Quarterly Data - Unaudited (Det

Quarterly Data - Unaudited (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Quarterly Financial Information Disclosure [Abstract]
Operating Revenues	$ 34,025	$ 39,874	$ 36,701	$ 32,541	$ 34,626	$ 39,920	$ 35,277	$ 31,769	$ 143,141	$ 141,592	$ 134,598
Operating Income	6,339	11,424	9,814	5,634	8,331	13,177	9,385	6,527	33,211	37,420	35,520
Net Income	$ 7,237	$ 11,476	$ 10,923	$ 6,907	$ 8,307	$ 12,737	$ 9,713	$ 7,668	$ 36,543	$ 38,425	$ 33,888
Basic Earnings per Share	$ 0.42	$ 0.65	$ 0.62	$ 0.39	$ 0.47	$ 0.73	$ 0.55	$ 0.44	$ 2.08	$ 2.19	$ 2.02
Diluted Earnings per Share	0.41	0.65	0.62	0.39	0.47	0.72	0.55	0.44	2.07	2.18	2.01
Common Dividend Per Share	0.2900	0.2725	0.2725	0.2725	0.2725	0.2563	0.2563	0.2563	$ 1.108	$ 1.041	$ 0.976
High Common Stock Price	119.37	116.40	88.61	85.92	76.08	69.89	72.41	69.92
Low Common Stock Price	$ 98.12	$ 81.02	$ 77.31	$ 67.09	$ 61.81	$ 59.61	$ 53.70	$ 48.79