Leases - Components of Lease Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Lessee, Lease, Description [Line Items]
Operating lease costs	$ 40,915	$ 10,279	$ 61,412	$ 21,301
Financing lease costs:
Amortization of right-of-use assets	854	153	1,177	320
Interest on lease liabilities	26	11	46	22
Total financing lease costs	880	164	1,223	342
Variable lease costs	1,953	587	2,532	1,883
Total lease costs	43,748	$ 11,030	65,167	$ 23,526
Deemed Landlord Finance Lease
Financing lease costs:
Amortization of right-of-use assets	1,337		1,704
Interest on lease liabilities	5,638		7,146
Total financing lease costs	$ 6,975		$ 8,850