CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Utility plant:
Utility plant	$ 4,817,310	$ 4,536,272
Less accumulated depreciation and amortization	(1,568,986)	(1,477,402)
Net utility plant	3,248,324	3,058,870
Current assets:
Cash and cash equivalents	34,735	62,100
Restricted cash	34,315	22,925
Receivables:
Customers, net	78,561	55,079
Regulatory balancing accounts	52,918	66,826
Other, net	21,766	20,932
Unbilled revenue, net	45,178	33,140
Materials and supplies	15,454	12,564
Taxes, prepaid expenses, and other assets	19,355	21,969
Total current assets	302,282	295,535
Other assets:
Regulatory assets	265,630	283,620
Goodwill	36,814	36,814
Other assets	188,311	175,913
Total other assets	490,755	496,347
TOTAL ASSETS	4,041,361	3,850,752
Capitalization:
Common stock, $0.01 par value; 136,000 shares authorized, 57,711 and 55,598 outstanding in 2023 and 2022, respectively	577	556
Additional paid-in capital	875,640	760,336
Retained earnings	534,451	556,698
Noncontrolling interests	4,327	4,804
Total equity	1,414,995	1,322,394
Long-term debt, net	1,051,846	1,052,487
Total capitalization	2,466,841	2,374,881
Current liabilities:
Current maturities of long-term debt, net	1,823	3,310
Short-term borrowings	115,000	70,000
Accounts payable	152,869	140,986
Regulatory balancing accounts	26,458	12,240
Accrued interest	17,589	6,490
Accrued expenses and other liabilities	67,401	61,624
Total current liabilities	381,140	294,650
Deferred income taxes	332,869	330,251
Pension	80,674	78,443
Regulatory liabilities and other	289,131	287,294
Advances for construction	200,716	199,832
Contributions in aid of construction	289,990	285,401
Commitments and contingencies (Note 10)
TOTAL CAPITALIZATION AND LIABILITIES	$ 4,041,361	$ 3,850,752