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Leases - Lease Costs and Other Quantitative Information (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Leases [Abstract]        
Operating lease cost $ 13,502 $ 5,900 $ 27,779 $ 19,279
Variable lease cost 3,230 928 5,167 2,959
Sublease rental income (2,359) (938) (4,290) (2,818)
Total lease cost 14,373 5,890 28,656 19,420
Operating cash flows 16,490 5,260 29,854 15,580
Right-of-use assets obtained in exchange for new operating lease liabilities $ 353,984 $ 128 $ 353,984 $ 1,961
Weighted average remaining lease term (in years) - Operating leases 6 years 9 months 18 days 4 years 7 months 6 days 6 years 9 months 18 days 4 years 7 months 6 days
Weighted average discount rate - Operating leases 4000000.00% 4100000.00% 4000000.00% 4100000.00%