Long-term Debt (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($)	Sep. 30, 2022 USD ($)	Dec. 31, 2021 USD ($)
Line of Credit Facility [Line Items]
Line of credit facility		$ 650,000
Maximum borrowing capacity	$ 700,000
Percentage of subsidiary stock securing debt (in hundredths)	0.65
Unused commitment fee on the average daily unused portion (in hundredths)	0.25%
Average interest rate for the year	3.50%
Letters of Credit Outstanding, Amount	$ 1,000
Long-term debt	$ 369,400		$ 369,400
Long-term Debt, Maturity Date	Jun. 30, 2027
Alternate base rates, applicable margins [Abstract]
Applicable margin, federal funds rate (in hundredths)	0.50%
Applicable margin, 30-day LIBOR (in hundredths)	2.00%
LIBOR Borrowings [Member]
Line of Credit Facility [Line Items]
Description of basis for variable rate	SOFR
Minimum [Member] | LIBOR Borrowings [Member] | London Interbank Offered Rate (LIBOR) [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.50%
Minimum [Member] | Alternate Base Rate Borrowings [Member] | Base Rate [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.00%
Maximum [Member] | LIBOR Borrowings [Member] | London Interbank Offered Rate (LIBOR) [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate	2.25%
Maximum [Member] | Alternate Base Rate Borrowings [Member] | Base Rate [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.50%