SCHEDULE I - CONDENSED FINANCIAL INFORMATION OF PARENT - Basis of Presentation Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Nov. 06, 2023	Jan. 13, 2023	Apr. 22, 2022
Note payable to banks
Line of credit facility, current borrowing capacity				$ 165,000,000
Exercise of stock options and other issuance of Common Shares	18,371	25,956	47,182
Exercise of stock options and other issuance of Common Shares	$ 0	$ 0	$ 0
GSWC
Note payable to banks
Exercise of stock options and other issuance of Common Shares	1	0	0
Exercise of stock options and other issuance of Common Shares	$ 10,000,000
Debt Instrument, Face Amount	$ 130,000,000
Common Stock
Note payable to banks
Exercise of stock options and other issuance of Common Shares	19,000	26,000	47,000
Exercise of stock options and other issuance of Common Shares	$ 0	$ 0	$ 0
Common Stock | GSWC
Note payable to banks
Exercise of stock options and other issuance of Common Shares	1
Exercise of stock options and other issuance of Common Shares	$ 10,000,000
Related Party
Note payable to banks
Line of credit facility, current borrowing capacity	30,000,000
Financing receivable, after allowance for credit loss	0	26,000,000
Notes Payable	$ 0	$ 0
Unsecured Private Placement Notes | GSWC
Note payable to banks
Debt Instrument, Face Amount					$ 130,000,000
Maximum | Revolving Credit Facility
Note payable to banks
Line of credit facility, current borrowing capacity						$ 280,000,000