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Debt (Schedule of Undiscounted Maturities of Long-Term Debt) (Details)
$ in Thousands
Dec. 31, 2018
USD ($)
Debt Disclosure [Abstract]  
2019 $ 117,954
2020 29,356
2021 49,327
2022 274,424
2023 170
Thereafter 377,921
Total Long-Term Debt Maturities $ 849,152