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Leases - Components of Lease Expense (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Leases [Abstract]        
Operating Lease, Expense $ 7,911 $ 7,942 $ 15,488 $ 15,853
Finance Lease, Right-of-Use Asset, Amortization 445 281 888 547
Finance Lease, Interest Expense 108 51 217 100
Short-term Lease Payments 5,861 6,185 11,751 12,611
Lease, Cost $ 14,325 $ 14,459 $ 28,344 $ 29,111