CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Operating activities:
Net income	$ 41,226	$ 32,395
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	59,606	57,847
Deferred income taxes	8,642	1,278
Stock-based compensation	2,674	2,813
Allowance for equity funds used during construction	(823)	(1,145)
Changes in operating assets and liabilities:
Accounts receivable and accrued unbilled utility revenue	(15,275)	(9,746)
Accounts payable and other current liabilities	(9,400)	(1,952)
Accrued groundwater extraction charges, purchased water and power	13,192	8,102
Tax receivable and payable, and other accrued taxes	118	3,617
Postretirement benefits	(1,420)	(1,080)
Regulatory assets and liabilities excluding cost of removal, income tax temporary differences and postretirement benefits	4,931	8,621
Other changes, net	546	(218)
Net cash provided by operating activities	104,017	100,532
Investing activities:
Company-funded	(204,440)	(158,368)
Contributions in aid of construction	(11,963)	(11,779)
Cost to retire utility plant, net of salvage	(1,471)	(1,434)
Proceeds from sale of real estate investments	0	40,628
Other changes, net	0	(29)
Net cash used in investing activities	(217,874)	(130,982)
Financing activities:
Borrowings from lines of credit	114,959	151,668
Repayments of lines of credit	(73,243)	(106,556)
Long-term borrowings	0	25,000
Repayments of long-term borrowings	(1,738)	(41,488)
Issuance of common stock, net of issuance costs	83,713	32,302
Dividends paid	(28,746)	(25,724)
Receipts of advances and contributions in aid of construction	30,293	10,054
Refunds of advances for construction	(2,760)	(1,341)
Other changes, net	114	(384)
Net cash provided by financing activities	122,592	43,531
Net change in cash and cash equivalents	8,735	13,081
Cash and cash equivalents, beginning of period	11,114	9,723
Cash and cash equivalents, end of period	19,849	22,804
Cash paid (refunded) during the period for:
Interest	40,867	38,100
Interest, net of amounts capitalized	37,895	36,509
Income taxes	(2,370)	702
Supplemental disclosure of non-cash activities:
Accrued payables for additions to utility plant	36,941	29,125
Utility property installed by developers	1,459	748
Proceeds receivable from sale of real estate investments	0	2,801
Accrued selling expenses on sale of real estate investments	$ 0	$ 2,386