Summary of Significant Accounting Policies Summary of Significant Accounting Policies - Leases Costs (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Lessee, Lease, Description [Line Items]
Operating lease cost	$ 119,277	$ 113,392	$ 242,566	$ 222,571
Depreciation of financing lease right-of-use assets	12,567	14,942	25,522	31,271
Interest expense for financing lease liabilities	4,929	4,925	9,773	11,067
Total financing lease cost	17,496	19,867	35,295	42,338
Variable lease costs	26,996	23,847	54,801	46,610
Cost of sales
Lessee, Lease, Description [Line Items]
Operating lease cost	116,448	110,441	236,763	216,335
Selling, general and administrative
Lessee, Lease, Description [Line Items]
Operating lease cost	$ 2,829	$ 2,951	$ 5,803	$ 6,236