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Leases - Components of Lease Expense (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Leases [Abstract]    
Operating lease costs $ 20,497 $ 11,022
Financing lease costs:    
Amortization of right-of-use assets 322 167
Interest on lease liabilities 20 11
Total financing lease costs 342 178
Variable lease costs 579 1,296
Total lease costs $ 21,418 $ 12,496