CONSOLIDATED STATEMENTS OF CAPITALIZATION - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Common Shareholders' Equity:
Common shares	$ 425,153	$ 355,143
Retained earnings	620,428	564,908
Common shareholder’s equity	1,045,581	920,051
Long-Term Debt
Debt and Lease Obligation	794,310	643,893
Less: Current maturities	(8,209)	(385)
Debt issuance costs	(3,401)	(3,126)
Long-Term Debt	782,700	640,382
Total capitalization	1,828,281	1,560,433
Common Stock Including Additional Paid in Capital
Common Shareholders' Equity:
Common shareholder’s equity	425,153	355,143
GSWC
Common Shareholders' Equity:
Common shares	478,494	413,797
Retained earnings	455,243	392,036
Common shareholder’s equity	933,737	805,833
Long-Term Debt
Debt and Lease Obligation	709,310	608,893
Less: Current maturities	(8,209)	(385)
Debt issuance costs	(3,041)	(2,961)
Long-Term Debt	698,060	605,547
Total capitalization	1,631,797	1,411,380
GSWC | Common Stock Including Additional Paid in Capital
Common Shareholders' Equity:
Common shareholder’s equity	478,494	413,797
6.81% notes due 2028
Long-Term Debt
Debt and Lease Obligation	15,000	15,000
6.81% notes due 2028 | GSWC
Long-Term Debt
Debt and Lease Obligation	15,000	15,000
6.59% notes due 2029
Long-Term Debt
Debt and Lease Obligation	40,000	40,000
6.59% notes due 2029 | GSWC
Long-Term Debt
Debt and Lease Obligation	40,000	40,000
7.875% notes due 2030
Long-Term Debt
Debt and Lease Obligation	20,000	20,000
7.875% notes due 2030 | GSWC
Long-Term Debt
Debt and Lease Obligation	20,000	20,000
7.23% notes due 2031
Long-Term Debt
Debt and Lease Obligation	50,000	50,000
7.23% notes due 2031 | GSWC
Long-Term Debt
Debt and Lease Obligation	50,000	50,000
6.00% notes due 2041
Long-Term Debt
Debt and Lease Obligation	62,000	62,000
6.00% notes due 2041 | GSWC
Long-Term Debt
Debt and Lease Obligation	62,000	62,000
3.45% notes due 2029
Long-Term Debt
Debt and Lease Obligation	15,000	15,000
3.45% notes due 2029 | GSWC
Long-Term Debt
Debt and Lease Obligation	15,000	15,000
5.87% notes due 2028
Long-Term Debt
Debt and Lease Obligation	40,000	40,000
5.87% notes due 2028 | GSWC
Long-Term Debt
Debt and Lease Obligation	40,000	40,000
2.17% notes due 2030
Long-Term Debt
Debt and Lease Obligation	85,000	85,000
2.17% notes due 2030 | GSWC
Long-Term Debt
Debt and Lease Obligation	85,000	85,000
2.90% notes due 2040
Long-Term Debt
Debt and Lease Obligation	75,000	75,000
2.90% notes due 2040 | GSWC
Long-Term Debt
Debt and Lease Obligation	75,000	75,000
4.548% note due 2032
Long-Term Debt
Debt and Lease Obligation	17,500	17,500
4.949% note due 2037
Long-Term Debt
Debt and Lease Obligation	17,500	17,500
5.12% notes due 2033
Long-Term Debt
Debt and Lease Obligation	100,000	100,000
5.12% notes due 2033 | GSWC
Long-Term Debt
Debt and Lease Obligation	100,000	100,000
5.22 % note due 2038
Long-Term Debt
Debt and Lease Obligation	30,000	30,000
5.22 % note due 2038 | GSWC
Long-Term Debt
Debt and Lease Obligation	30,000	30,000
5.50% notes due 2027
Long-Term Debt
Debt and Lease Obligation	65,000	65,000
5.50% notes due 2027 | GSWC
Long-Term Debt
Debt and Lease Obligation	65,000	65,000
6.12% notes due 2030
Long-Term Debt
Debt and Lease Obligation	50,000	0
5.30% notes due 2032
Long-Term Debt
Debt and Lease Obligation	75,000	0
5.30% notes due 2032 | GSWC
Long-Term Debt
Debt and Lease Obligation	75,000	0
5.65% notes due 2037
Long-Term Debt
Debt and Lease Obligation	25,000	0
5.65% notes due 2037 | GSWC
Long-Term Debt
Debt and Lease Obligation	25,000	0
5.50% notes due 2026
Long-Term Debt
Debt and Lease Obligation	7,730	7,730
5.50% notes due 2026 | GSWC
Long-Term Debt
Debt and Lease Obligation	7,730	7,730
State Water Project due 2035
Long-Term Debt
Debt and Lease Obligation	2,466	1,807
State Water Project due 2035 | GSWC
Long-Term Debt
Debt and Lease Obligation	2,466	1,807
American Recovery and Reinvestment Act Obligation due 2033
Long-Term Debt
Debt and Lease Obligation	2,114	2,356
American Recovery and Reinvestment Act Obligation due 2033 | GSWC
Long-Term Debt
Debt and Lease Obligation	$ 2,114	$ 2,356