CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Statement of Financial Position [Abstract]
Water Production	$ 249,153	$ 247,286
Transmission and Distribution	735,138	697,200
General	97,581	95,658
Construction Work in Progress	53,570	24,947
TOTAL	1,135,442	1,065,091
Less Accumulated Depreciation	214,891	199,723
UTILITY PLANT - NET	920,551	865,368
Cash and Cash Equivalents	3,828	3,533
Accounts Receivable, net of allowance for uncollectible accounts of $2,326 and $2,574, respectively	16,018	15,311
Unbilled Revenues	8,659	7,273
Materials and Supplies (at average cost)	6,177	5,358
Prepayments	2,624	2,880
TOTAL CURRENT ASSETS	37,306	34,355
Operating Lease Right of Use Asset	3,826	4,503
Preliminary Survey and Investigation Charges	2,806	3,540
Regulatory Assets	90,046	100,738
Non-utility Assets - Net	11,207	11,428
Employee Benefit Plans	8,689
Other	19	83
TOTAL OTHER ASSETS	116,593	120,292
TOTAL ASSETS	1,074,450	1,020,015
CAPITALIZATION AND LIABILITIES
Common Stock, No Par Value	233,054	221,919
Retained Earnings	167,274	145,807
TOTAL COMMON EQUITY	400,328	367,726
Preferred Stock	2,084	2,084
Long-term Debt	290,280	306,520
TOTAL CAPITALIZATION	692,692	676,330
Current Portion of Long-term Debt	17,462	6,731
Notes Payable	55,500	13,000
Accounts Payable	24,847	21,125
Accrued Taxes	12,162	8,621
Accrued Interest	2,535	1,986
Unearned Revenues and Advanced Service Fees	1,365	1,330
Other	3,988	3,826
TOTAL CURRENT LIABILITIES	117,859	56,619
COMMITMENTS AND CONTINGENT LIABILITIES (Note 4)
Customer Advances for Construction	21,382	23,529
Lease Obligations	3,706	4,367
Accumulated Deferred Income Taxes	77,783	69,500
Employee Benefit Plans		11,290
Regulatory Liabilities	46,734	49,431
Other	919	1,086
TOTAL OTHER LIABILITIES	150,524	159,203
CONTRIBUTIONS IN AID OF CONSTRUCTION	113,375	127,863
TOTAL CAPITALIZATION AND LIABILITIES	$ 1,074,450	$ 1,020,015