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Operating Leases - Schedule of Net Lease Cost (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Lessee Disclosure [Abstract]        
Operating lease cost $ 25,251 $ 22,921 $ 73,172 $ 68,081
Short-term lease cost 590 403 2,892 1,152
Variable lease cost 20 54 62 88
Sublease income (997) (1,244) (2,901) (3,729)
Net lease cost 24,864 $ 22,134 $ 73,225 $ 65,592
Operating lease cash flows $ 63,724      
Weighted-average remaining lease term 12 years 1 month 6 days   12 years 1 month 6 days  
Weighted-average discount rate 4.32%   4.32%