Long-term Debt - Fair Value (Details) - 4.125% Senior Unsecured Notes Due 2029 - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Debt	$ 400,000	$ 400,000
Fair Value, Inputs, Level 2 [Member]
Debt Instrument [Line Items]
Long-term Debt, Fair Value	$ 339,000	$ 344,000