Debt (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022	Sep. 07, 2022	Oct. 09, 2014
Debt Instrument [Line Items]
Remaining Principal Amount Of Debt Outstanding	$ 650,000	$ 750,000
Unamortized discount	1,199	1,922
Carrying Value	0	100,000
Carrying Value	648,801	648,078
Carrying Value Of Debt Outstanding	648,801	748,078
Senior Notes Due 2024 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Principal	350,000	350,000		$ 350,000
Unamortized discount	936	1,581		$ 1,400
Carrying Value	349,064	348,419
Term Loan Due Twenty-Twenty Five
Debt Instrument [Line Items]
Principal			$ 300,000
Term Loan Due Twenty-Twenty Five | Notes Payable to Banks
Debt Instrument [Line Items]
Principal	300,000	300,000
Unamortized discount	263	341
Carrying Value	299,737	299,659
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Principal	0	100,000
Carrying Value	$ 0	$ 100,000