CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 60,554	$ 34,325	$ 170,621	$ 21,438
Other comprehensive income (loss):
Unrecoverable pension benefit plan costs, net of taxes of $3,823, $0, $3,823 and $0, respectively	3,823	0	(9,840)	0
Amortization of defined benefit pension plans, net of taxes of $250, $0, $250 and $0, respectively	48	0	643	0
Other comprehensive income (loss), net of tax	3,871	0	(9,197)	0
Comprehensive income	64,425	34,325	161,424	21,438
Comprehensive loss attributable to noncontrolling interest	(126)	(113)	(527)	(345)
Comprehensive income attributable to California Water Service Group	$ 64,551	$ 34,438	$ 161,951	$ 21,783