CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Property, Plant and Equipment
Regulated utility plant, at cost	$ 2,638,276	$ 2,476,509
Non-utility property, at cost	43,389	40,243
Total	2,681,665	2,516,752
Less - accumulated depreciation	(641,076)	(624,472)
Net property, plant and equipment	2,040,589	1,892,280
Other Property and Investments
Goodwill	1,116	1,116
Other property and investments	48,103	42,932
Total other property and investments	49,219	44,048
Current Assets
Cash and cash equivalents	16,469	14,073
Accounts receivable - customers, less allowance for doubtful accounts	44,422	34,250
Unbilled receivable	26,871	23,516
Receivable from the U.S. government (Note 2)	44,329	49,306
Other accounts receivable, less allowance for doubtful accounts	3,104	6,340
Income taxes receivable, current	2,133	52
Materials and supplies	16,421	17,574
Regulatory assets — current	42,005	45,144
Prepayments and other current assets	6,945	5,767
Contract assets (Note 2)	19,661	9,956
Total current assets	222,360	205,978
Other Assets
Unbilled revenue — receivable from the U.S. government (Note 2)	4,207	4,886
Receivable from the U.S. government (Note 2)	38,953	42,183
Contract assets (Note 2)	932	4,422
Operating lease right-of-use assets	8,585	7,982
Regulatory assets	36,952	25,585
Other	18,827	18,758
Total other assets	108,456	103,816
Total Assets	2,420,624	2,246,122
Capitalization
Common shares, no par value	325,278	263,179
Retained earnings	554,188	512,930
Total common shareholders’ equity	879,466	776,109
Long-term debt	640,247	575,555
Total capitalization	1,519,713	1,351,664
Current Liabilities
Notes payable to banks	177,000	42,000
Long-term debt — current	385	353
Accounts payable	76,700	68,705
Income taxes payable	161	492
Accrued other taxes	15,533	14,654
Accrued employee expenses	15,723	14,738
Accrued interest	9,622	8,607
Contract liabilities (Note 2)	3,649	1,352
Operating lease liabilities	2,105	1,856
Purchase power contract derivative at fair value (Note 5)	8,320	2,360
Other	12,234	11,506
Total current liabilities	321,432	166,623
Other Credits
Notes payable to banks	120,000	291,500
Advances for construction	69,983	67,431
Contributions in aid of construction – net	154,924	151,414
Deferred income taxes	175,966	161,577
Regulatory liabilities	3,896	1,222
Unamortized investment tax credits	959	1,011
Accrued pension and other postretirement benefits	32,289	32,652
Operating lease liabilities	6,934	6,619
Other	14,528	14,409
Total other credits	579,479	727,835
Commitments and Contingencies (Note 9)
Total Capitalization and Liabilities	$ 2,420,624	$ 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)	37,796,873	36,980,612
GSWC
Property, Plant and Equipment
Total	$ 2,416,554	$ 2,278,669
Less - accumulated depreciation	(555,123)	(543,135)
Net property, plant and equipment	1,861,431	1,735,534
Other Property and Investments
Total other property and investments	45,660	40,480
Current Assets
Cash and cash equivalents	2,732	3,195
Accounts receivable - customers, less allowance for doubtful accounts	41,887	31,018
Unbilled receivable	20,877	17,185
Other accounts receivable, less allowance for doubtful accounts	2,535	4,301
Intercompany receivable	0	380
Income taxes receivable, current	1,854	222
Materials and supplies	7,831	7,380
Regulatory assets — current	40,627	44,007
Prepayments and other current assets	5,113	4,544
Total current assets	123,456	112,232
Other Assets
Operating lease right-of-use assets	8,502	7,796
Regulatory assets	8,072	2,944
Other	17,129	17,169
Total other assets	33,703	27,909
Total Assets	2,064,250	1,916,155
Capitalization
Common shares, no par value	373,548	370,909
Retained earnings	389,802	332,919
Total common shareholders’ equity	763,350	703,828
Long-term debt	605,417	540,738
Total capitalization	1,368,767	1,244,566
Current Liabilities
Notes payable to banks	140,000	0
Long-term debt — current	385	353
Accounts payable	63,948	55,488
Accrued other taxes	13,024	12,658
Accrued employee expenses	12,160	11,502
Accrued interest	8,417	7,508
Operating lease liabilities	2,029	1,725
Intercompany payable	237	0
Other	11,544	10,715
Total current liabilities	251,744	99,949
Other Credits
Notes payable to banks	0	150,000
Advances for construction	69,963	67,411
Contributions in aid of construction – net	154,924	151,414
Deferred income taxes	160,855	147,458
Regulatory liabilities	3,896	1,222
Unamortized investment tax credits	959	1,011
Accrued pension and other postretirement benefits	31,855	32,309
Operating lease liabilities	6,934	6,568
Other	14,353	14,247
Total other credits	443,739	571,640
Commitments and Contingencies (Note 9)
Total Capitalization and Liabilities	$ 2,064,250	$ 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