CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Utility plant:
Utility plant	$ 5,627,888	$ 5,400,489
Less accumulated depreciation and amortization	(1,293,277)	(1,241,785)
Net utility plant	4,334,611	4,158,704
Current assets:
Cash and cash equivalents	50,539	50,121
Restricted cash	45,617	45,566
Receivables:
Customers, net	75,437	58,585
Regulatory balancing accounts	63,169	55,917
Other, net	28,109	33,976
Accrued and unbilled revenue, net	52,802	39,718
Materials and supplies	19,879	20,511
Taxes, prepaid expenses, and other assets	26,029	19,742
Total current assets	361,581	324,136
Other assets:
Regulatory assets	359,919	357,406
Goodwill	37,063	37,063
Other	306,755	302,974
Total other assets	703,737	697,443
TOTAL ASSETS	5,399,929	5,180,283
Capitalization:
Common stock, $0.01 par value; 136,000 shares authorized, 59,581 and 59,484 outstanding on June 30, 2025 and December 31, 2024, respectively	596	595
Additional paid-in capital	968,820	966,975
Retained earnings	692,319	674,918
Accumulated other comprehensive loss	(6,909)	(7,217)
Noncontrolling interest	2,443	3,015
Total equity	1,657,269	1,638,286
Long-term debt, net	1,104,046	1,104,571
Total capitalization	2,761,315	2,742,857
Current liabilities:
Current maturities of long-term debt, net	72,467	72,422
Short-term borrowings	360,000	205,000
Accounts payable	166,958	167,533
Regulatory balancing accounts	17,641	22,648
Accrued other taxes	3,065	6,084
Accrued interest	8,980	8,406
Other accrued liabilities	56,969	56,271
Total current liabilities	686,080	538,364
Deferred income taxes	422,779	411,083
Regulatory liabilities	845,657	814,551
Pension	82,166	81,665
Advances for construction	207,730	202,614
Contributions in aid of construction	294,867	294,970
Other	99,335	94,179
Commitments and contingencies (Note 9)
TOTAL CAPITALIZATION AND LIABILITIES	$ 5,399,929	$ 5,180,283