CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Utility plant:
Utility plant	$ 4,341,433	$ 4,197,344
Less accumulated depreciation and amortization	(1,406,757)	(1,350,482)
Net utility plant	2,934,676	2,846,862
Current assets:
Cash and cash equivalents	61,749	78,380
Receivables:
Customers, net	68,404	60,785
Regulatory balancing accounts	56,625	78,597
Other, net	19,803	18,452
Unbilled revenue, net	38,796	32,760
Materials and supplies at weighted average cost	10,567	9,511
Taxes, prepaid expenses, and other assets	20,708	21,973
Total current assets	276,652	300,458
Other assets:
Regulatory assets	287,625	285,692
Goodwill	36,814	36,814
Other assets	146,985	153,445
Total other assets	471,424	475,951
TOTAL ASSETS	3,682,752	3,623,271
Capitalization:
Common stock, $0.01 par value; 68,000 shares authorized, 54,356 and 53,716 outstanding in 2022 and 2021, respectively	544	537
Additional paid-in capital	682,353	651,121
Retained earnings	519,625	525,936
Noncontrolling interests	4,784	5,386
Total equity	1,207,306	1,182,980
Long-term debt, net	1,054,170	1,055,794
Total capitalization	2,261,476	2,238,774
Current liabilities:
Current maturities of long-term debt, net	5,783	5,192
Short-term borrowings	70,000	35,000
Accounts payable	139,732	144,369
Regulatory balancing accounts	9,627	17,547
Accrued interest	6,740	6,542
Accrued expenses and other liabilities	54,201	47,926
Total current liabilities	286,083	256,576
Deferred income taxes	300,489	298,945
Pension	94,796	92,287
Regulatory liabilities and other	254,109	252,938
Advances for construction	198,674	198,086
Contributions in aid of construction	287,125	285,665
Commitments and contingencies (Note 10)
TOTAL CAPITALIZATION AND LIABILITIES	$ 3,682,752	$ 3,623,271