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Leases - Components of Lease Expense (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Leases [Abstract]    
Operating lease cost $ 25,442 $ 27,035
Finance lease cost:    
Amortization of right-of-use assets 6,743 7,073
Interest on lease liabilities 124 453
Total finance lease cost $ 6,867 $ 7,526