CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Utility plant:
Land	$ 44,498	$ 44,600
Depreciable plant and equipment	4,785,471	4,688,644
Construction work in progress	257,175	269,272
Intangible assets	51,683	51,683
Total utility plant	5,138,827	5,054,199
Less: accumulated depreciation and amortization	1,140,243	1,120,232
Net utility plant	3,998,584	3,933,967
Nonutility properties	2,166	1,683
Less: accumulated depreciation and amortization	104	103
Net nonutility properties	2,062	1,580
Current assets:
Cash and cash equivalents	153,008	20,686
Accounts receivable:
Customers, net of allowances for credit losses of $748 and $722 on March 31, 2026 and December 31, 2025, respectively	62,069	62,471
Income tax	1,520	2,720
Other	11,263	7,710
Accrued unbilled revenue	65,189	68,971
Prepaid expenses	14,747	11,634
Current regulatory assets	7,848	8,315
Other current assets	7,770	8,086
Total current assets	323,414	190,593
Other assets:
Regulatory assets, less current portion	246,540	246,547
Investments	20,243	19,711
Postretirement benefit plans	82,493	80,967
Goodwill	640,311	640,311
Other	39,657	35,890
Total other assets	1,029,244	1,023,426
Total assets	5,353,304	5,149,566
Stockholders’ equity:
Common stock, $0.001 par value; authorized 70,000,000 shares; issued and outstanding shares 41,839,540 on March 31, 2026 and 36,118,242 on December 31, 2025	42	36
Additional paid-in capital	1,248,402	958,188
Retained earnings	584,171	581,080
Accumulated other comprehensive income	1,467	1,467
Total stockholders’ equity	1,834,082	1,540,771
Long-term debt, less current portion	1,865,513	1,866,819
Total capitalization	3,699,595	3,407,590
Current liabilities:
Lines of credit	5	86,834
Current portion of long-term debt	8,628	23,504
Accrued groundwater extraction charges, purchased water and power	27,931	29,321
Accounts payable	62,880	75,427
Accrued interest	22,904	18,241
Accrued payroll	11,608	19,109
Other current liabilities	26,092	20,942
Total current liabilities	160,048	273,378
Deferred income taxes	311,899	307,893
Advances for construction	210,813	201,413
Contributions in aid of construction	342,410	342,697
Postretirement benefit plans	45,849	45,878
Regulatory liabilities, less current portion	556,379	546,797
Other noncurrent liabilities	26,311	23,920
Commitments and contingencies
Total capitalization and liabilities	$ 5,353,304	$ 5,149,566