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Operating Leases - Supplemental Cash Flow (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Leases [Abstract]    
Cash paid for amounts included in the measurement of operating lease liabilities $ 85,565 $ 82,473
Leased assets obtained in exchange for new operating lease liabilities $ 78,280 $ 81,151