Leases - Lease Costs (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
	Jul. 26, 2020	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Leases [Abstract]
Facility operating expense		$ 4,755	$ 4,532	$ 14,540	$ 13,761
Facility lease expense		51,620	67,253	178,480	203,610
Operating lease expense		56,375	71,785	193,020	217,371
Operating lease expense adjustment		117,322	4,814	132,276	13,626
Changes in operating lease assets and liabilities for lessor capital expenditure reimbursements		(3,131)	(11,043)	(13,640)	(12,043)
Operating cash flows from operating leases		170,566	65,556	311,656	218,954
Payments for lease restructuring	$ 119,200
Depreciation and amortization		7,818	11,675	24,999	35,030
Interest expense: financing lease obligations		11,908	16,567	37,082	49,959
Financing lease expense		19,726	28,242	62,081	84,989
Operating cash flows from financing leases		11,908	16,567	37,082	49,959
Financing cash flows from financing leases		4,548	5,549	14,312	16,502
Changes in financing lease assets and liabilities for lessor capital expenditure reimbursement		(923)	0	(4,337)	0
Total cash flows from financing leases		$ 15,533	$ 22,116	$ 47,057	$ 66,461