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Debt Debt (Schedule of Interest Expense) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Schedule of Interest Expense [Abstract]      
Interest expense $ 43,458 $ 53,923 $ 45,789
Derivative Instruments, Loss Reclassified from Accumulated OCI into Income, Effective Portion 6,330   164
Derivative Instruments, Gain Reclassified from Accumulated OCI into Income, Effective Portion   791  
Capitalized interest (254) (399) (212)
Amortization of debt issuance costs and bond discount 3,348 3,566 3,314
Total interest expense $ 52,882 $ 56,299 $ 49,055