CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Regulated utility plant, at cost
Water	$ 2,082,927	$ 2,006,468
Electric	156,471	133,815
Total	2,239,398	2,140,283
Non-regulated utility property, at cost	40,223	38,066
Total utility plant, at cost	2,279,621	2,178,349
Less — accumulated depreciation	(624,472)	(606,231)
Utility plant before construction work in progress	1,655,149	1,572,118
Construction work in progress	237,131	181,648
Net utility plant	1,892,280	1,753,766
Other Property and Investments
Goodwill	1,116	1,116
Other property and investments	42,932	36,907
Total other property and investments	44,048	38,023
Current Assets
Cash and cash equivalents	14,073	5,997
Accounts receivable — customers, less allowance for doubtful accounts	34,250	26,206
Unbilled receivable (Note 2)	23,516	20,663
Receivable from U.S. government, less allowance for doubtful accounts (Note 2)	49,306	34,974
Other accounts receivable, less allowance for doubtful accounts	6,340	4,215
Income taxes receivable	52	3,901
Materials and supplies	17,574	14,623
Regulatory assets — current	45,144	14,028
Prepayments and other current assets	5,767	5,450
Contract assets (Note 2)	9,956	9,390
Purchase power contract derivatives at fair value	0	11,847
Total current assets	205,978	151,294
Regulatory and Other Assets
Unbilled revenue, receivable from U.S government	4,886	6,456
Receivable from U.S. government (Note 2)	42,183	50,482
Contract assets (Note 2)	4,422	5,592
Operating lease right-of-use assets	7,982	9,535
Regulatory assets	25,585	5,694
Other	18,758	13,532
Total other assets	103,816	91,291
Total Assets	2,246,122	2,034,374
Capitalization
Common shareholder’s equity	776,109	709,549
Long-term debt	575,555	446,547
Total capitalization	1,351,664	1,156,096
Current Liabilities
Notes payable to bank	42,000	255,500
Long-term debt — current	353	399
Accounts payable	68,705	84,849
Income taxes payable	492	1,848
Accrued other taxes	14,654	16,257
Accrued employee expenses	14,738	13,996
Accrued interest	8,607	5,308
Regulatory liabilities	0	4,574
Contract liabilities (Note 2)	1,352	903
Operating lease liabilities	1,856	1,892
Purchase power contract derivative at fair value (Note 5)	2,360	0
Other	11,506	10,996
Total current liabilities	166,623	396,522
Other Credits
Note payable to bank, noncurrent	291,500	22,000
Advances for construction	67,431	64,351
Contributions in aid of construction — net	151,414	147,918
Deferred income taxes	161,577	149,677
Regulatory liabilities	1,222	40,602
Unamortized investment tax credits	1,011	1,082
Accrued pension and other post-retirement benefits	32,652	33,636
Operating lease liabilities	6,619	8,090
Other	14,409	14,400
Total other credits	727,835	481,756
Commitments and Contingencies
Total liabilities and capitalization	$ 2,246,122	$ 2,034,374