Allowance for Doubtful Accounts (Details) - USD ($)	1 Months Ended			12 Months Ended
	Dec. 31, 2022	Feb. 28, 2022	Jan. 31, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Changes in allowance for doubtful accounts
Balance at beginning of year			$ 3,569,000	$ 4,440,000	$ 3,569,000	$ 5,316,000
Provision charged to expense				932,000	2,842,000	8,150,000
Allowance for doubtful accounts receivable charge offs net of recoveries				(1,782,000)	(1,971,000)	(9,897,000)
Balance at end of year	$ 4,440,000			3,590,000	4,440,000	3,569,000
Components of allowance for doubtful accounts
Allowance for doubtful accounts related to accounts receivable-customer	4,387,000			3,537,000	4,387,000	3,516,000
Allowance for doubtful accounts related to other accounts receivable	53,000			53,000	53,000	53,000
Total allowance for doubtful accounts	4,440,000			3,590,000	4,440,000	3,569,000
GSWC
Changes in allowance for doubtful accounts
Balance at beginning of year			3,221,000	4,196,000	3,221,000	4,960,000
Provision charged to expense				754,000	2,501,000	7,732,000
Allowance for doubtful accounts receivable charge offs net of recoveries				(1,503,000)	(1,526,000)	(9,471,000)
Balance at end of year	4,196,000			3,447,000	4,196,000	3,221,000
Components of allowance for doubtful accounts
Allowance for doubtful accounts related to accounts receivable-customer	4,143,000			3,394,000	4,143,000	3,168,000
Allowance for doubtful accounts related to other accounts receivable	53,000			53,000	53,000	53,000
Total allowance for doubtful accounts	4,196,000			3,447,000	4,196,000	$ 3,221,000
Relief funding			$ 9,500,000	$ 3,500,000	9,500,000
BVES
Components of allowance for doubtful accounts
Relief funding	$ 152,000	$ 321,000			$ 473,000