Debt (Schedule of Long-Term Debt) (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Long-term principal	$ 1,036,735	$ 762,235
Debt issuance costs	(2,324)	(1,598)
Unamortized discounts	(1,731)	(2,381)
Total long-term debt	1,032,680	758,256
Less: current portion of long-term debt	(39,979)	(42,977)
Long-term debt	992,701	715,279
Variable Rate Term Loans [Member]
Debt Instrument [Line Items]
Long-term principal	721,000	403,500
Fixed Rate Term Loans [Member]
Debt Instrument [Line Items]
Long-term principal	250,000	290,000
Revenue Bonds [Member]
Debt Instrument [Line Items]
Long-term principal	65,735	65,735
Medium Term Notes [Member]
Debt Instrument [Line Items]
Long-term principal	$ 0	$ 3,000

Face (par) amount of debt instrument at time of issuance.

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