CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Property, Plant and Equipment
Regulated utility plant, at cost	$ 2,577,968	$ 2,476,509
Non-utility property, at cost	42,606	40,243
Total	2,620,574	2,516,752
Less - accumulated depreciation	(638,938)	(624,472)
Net property, plant and equipment	1,981,636	1,892,280
Other Property and Investments
Goodwill	1,116	1,116
Other property and investments	45,923	42,932
Total other property and investments	47,039	44,048
Current Assets
Cash and cash equivalents	3,583	14,073
Accounts receivable - customers, less allowance for doubtful accounts	39,076	34,250
Unbilled receivable	24,481	23,516
Receivable from the U.S. government (Note 2)	50,138	49,306
Other accounts receivable, less allowance for doubtful accounts	4,333	6,340
Materials and supplies	16,969	17,574
Regulatory assets — current	43,756	45,144
Prepayments and other current assets	9,042	5,819
Contract assets (Note 2)	18,145	9,956
Total current assets	209,523	205,978
Other Assets
Unbilled revenue — receivable from the U.S. government (Note 2)	5,304	4,886
Receivable from the U.S. government (Note 2)	40,192	42,183
Contract assets (Note 2)	918	4,422
Operating lease right-of-use assets	7,852	7,982
Regulatory assets	37,046	25,585
Other	18,810	18,758
Total other assets	110,122	103,816
Total Assets	2,348,320	2,246,122
Capitalization
Common shares, no par value	297,576	263,179
Retained earnings	535,901	512,930
Total common shareholders’ equity	833,477	776,109
Long-term debt	640,028	575,555
Total capitalization	1,473,505	1,351,664
Current Liabilities
Notes payable to banks	167,000	42,000
Long-term debt — current	365	353
Accounts payable	71,979	68,705
Income taxes payable	4,249	492
Accrued other taxes	13,068	14,654
Accrued employee expenses	13,085	14,738
Accrued interest	8,354	8,607
Contract liabilities (Note 2)	1,239	1,352
Operating lease liabilities	1,894	1,856
Purchase power contract derivative at fair value (Note 5)	5,593	2,360
Other	12,292	11,506
Total current liabilities	299,118	166,623
Other Credits
Notes payable to banks	128,000	291,500
Advances for construction	68,660	67,431
Contributions in aid of construction – net	154,201	151,414
Deferred income taxes	167,699	161,577
Regulatory liabilities	750	1,222
Unamortized investment tax credits	976	1,011
Accrued pension and other postretirement benefits	34,360	32,652
Operating lease liabilities	6,422	6,619
Other	14,629	14,409
Total other credits	575,697	727,835
Commitments and Contingencies (Note 9)
Total Capitalization and Liabilities	$ 2,348,320	$ 2,246,122
Consolidated Balance Sheets (Parenthetical)
Common Stock, Par Value (in usd per share)	$ 0	$ 0
Common Stock, Shares Authorized (in shares)	60,000,000	60,000,000
Common Stock, Shares, Outstanding (in shares)	37,457,199	36,980,612
GSWC
Property, Plant and Equipment
Total	$ 2,367,924	$ 2,278,669
Less - accumulated depreciation	(554,632)	(543,135)
Net property, plant and equipment	1,813,292	1,735,534
Other Property and Investments
Total other property and investments	43,477	40,480
Current Assets
Cash and cash equivalents	439	3,195
Accounts receivable - customers, less allowance for doubtful accounts	36,699	31,018
Unbilled receivable	18,290	17,185
Other accounts receivable, less allowance for doubtful accounts	3,154	4,301
Intercompany receivable	502	380
Income taxes receivable, current	0	222
Materials and supplies	7,804	7,380
Regulatory assets — current	42,881	44,007
Prepayments and other current assets	6,445	4,544
Total current assets	116,214	112,232
Other Assets
Operating lease right-of-use assets	7,734	7,796
Regulatory assets	11,183	2,944
Other	17,141	17,169
Total other assets	36,058	27,909
Total Assets	2,009,041	1,916,155
Capitalization
Common shares, no par value	372,892	370,909
Retained earnings	375,817	332,919
Total common shareholders’ equity	748,709	703,828
Long-term debt	605,202	540,738
Total capitalization	1,353,911	1,244,566
Current Liabilities
Notes payable to banks	119,000	0
Long-term debt — current	365	353
Accounts payable	57,407	55,488
Income taxes payable	3,872	0
Accrued other taxes	11,226	12,658
Accrued employee expenses	9,997	11,502
Accrued interest	7,460	7,508
Operating lease liabilities	1,781	1,725
Other	11,639	10,715
Total current liabilities	222,747	99,949
Other Credits
Notes payable to banks	0	150,000
Advances for construction	68,640	67,411
Contributions in aid of construction – net	154,201	151,414
Deferred income taxes	152,979	147,458
Regulatory liabilities	750	1,222
Unamortized investment tax credits	976	1,011
Accrued pension and other postretirement benefits	33,956	32,309
Operating lease liabilities	6,422	6,568
Other	14,459	14,247
Total other credits	432,383	571,640
Commitments and Contingencies (Note 9)
Total Capitalization and Liabilities	$ 2,009,041	$ 1,916,155
Consolidated Balance Sheets (Parenthetical)
Common Stock, Par Value (in usd per share)	$ 0	$ 0
Common Stock, Shares Authorized (in shares)	1,000	1,000
Common Stock, Shares, Outstanding (in shares)	171	171