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Leases - Supplemental Cash Flow Information (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Cash paid for amounts included in the measurement of lease liabilities:    
Operating cash flows used in operating leases $ 23,694 $ 28,374
Operating cash flows used in finance leases 124 453
Financing cash flows used in finance leases 4,600 6,731
Right-of-use assets obtained in exchange for lease obligations:    
Operating leases 89,328 27,116
Finance leases $ 0 $ 397