Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Income Statement [Abstract]
REVENUE	$ 149,041	$ 152,241	$ 273,343	$ 267,026
Production Expenses:
Purchased water	26,352	27,668	45,569	43,313
Power	3,394	3,391	6,474	6,394
Groundwater extraction charges	18,360	20,138	32,288	35,683
Other production expenses	11,596	9,831	21,719	19,233
Total production expenses	59,702	61,028	106,050	104,623
Administrative and general	23,260	21,326	47,465	42,219
Maintenance	6,891	6,587	13,586	12,852
Property taxes and other non-income taxes	7,579	7,149	15,888	14,664
Depreciation and amortization	25,207	23,512	52,813	46,950
Gain on sale of nonutility properties	0	0	(5,450)	0
Total operating expense	122,639	119,602	230,352	221,308
OPERATING INCOME	26,402	32,639	42,991	45,718
OTHER (EXPENSE) INCOME:
Interest on long-term debt and other interest expense	(14,241)	(13,681)	(27,970)	(27,120)
Pension non-service cost	941	339	1,890	665
Gain on sale of Texas Water Alliance	0	3,000	0	3,000
Other, net	824	1,784	1,819	3,538
Income before income taxes	13,926	24,081	18,730	25,801
Provision for income taxes	2,368	3,306	3,435	2,410
NET INCOME	11,558	20,775	15,295	23,391
Other comprehensive (loss) income, net	(248)	107	(429)	145
COMPREHENSIVE INCOME	$ 11,310	$ 20,882	$ 14,866	$ 23,536
EARNINGS PER SHARE
Basic (usd per share)	$ 0.38	$ 0.70	$ 0.51	$ 0.80
Diluted (usd per share)	0.38	0.69	0.50	0.79
DIVIDENDS PER SHARE (usd per share)	$ 0.36	$ 0.34	$ 0.72	$ 0.68
WEIGHTED AVERAGE SHARES OUTSTANDING
Basic (shares)	30,244,511	29,799,499	30,234,381	29,333,776
Diluted (shares)	30,346,040	29,924,191	30,341,065	29,459,782