Leases - Supplemental Balance Sheet Information (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Sep. 10, 2019	Dec. 31, 2018
Lessee, Lease, Description [Line Items]
Operating lease right-of-use assets	$ 144,330	$ 495,000
Other current liabilities	$ 57,910
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Deferred Long-term Liability Charges
Operating lease liabilities	$ 84,795
Total	$ 142,705
Operating Lease, Liability, Statement of Financial Position [Extensible List]	us-gaap:OperatingLeaseLiabilityNoncurrent us-gaap:AccountsPayableCurrent
Property and equipment, gross	$ 7,261,038		$ 5,688,678
Accumulated depreciation	(4,554,856)		(3,760,498)
Property and equipment, net	2,706,182		1,928,180
Other current liabilities	61,493
Other long-term liabilities	171,706
Total	$ 233,199		$ 66,984
Operating Lease, Weighted Average Remaining Lease Term	3 years 1 month 6 days
Finance Lease, Weighted Average Remaining Lease Term	3 years 9 months 18 days
Operating Lease, Weighted Average Discount Rate, Percent	5.00%
Finance Lease, Weighted Average Discount Rate, Percent	10.20%
Property and equipment,
Lessee, Lease, Description [Line Items]
Property and equipment, gross	$ 890,598
Accumulated depreciation	(683,271)
Property and equipment, net	$ 207,327