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Leases - Cash Flow (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Cash paid for amounts included in the measurement of liabilities    
Financing cash flows from finance leases $ 1,874 $ 819
Operating cash flows from finance leases 325 322
Operating cash flows from operating leases 44,023 51,179
Non-cash supplemental amounts    
ROU assets obtained in exchange for new finance lease liabilities 1,102 1,915
ROU assets obtained in exchange for new operating lease liabilities 87,331 4,557
ROU assets terminated in exchange for release from operating lease liabilities $ 113 $ 7,738