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Operating Leases - Supplemental Cash Flow (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Leases [Abstract]    
Cash paid for amounts included in the measurement of operating lease liabilities $ 28,835 $ 28,840
Leased assets obtained in exchange for new operating lease liabilities $ 24,983 $ 2,551