Long-Term Indebtedness (Schedule of Long-term Debt) (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Unamortized deferred financing fees	$ (7,189)	$ (9,052)
Long-term debt	908,811	1,118,974
Less current portion	(566)	(23,086)
Long-term debt, excluding current maturities	908,245	1,095,888
Convertible Notes
Debt Instrument [Line Items]
Long-term debt, gross	460,000	460,000
Line of Credit
Debt Instrument [Line Items]
Long-term debt, gross	122,742	289,067
Term Loan
Debt Instrument [Line Items]
Long-term debt, gross	330,000	375,000
Other
Debt Instrument [Line Items]
Long-term debt, gross	$ 3,258	$ 3,959