Leases - Balance Sheet Information (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Operating leases
RIght-of-use asset	$ 51,528	$ 85,668
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:OtherAssetsNoncurrent
Other current liabilities	$ (35,716)	$ (50,164)
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilitiesCurrent	us-gaap:OtherLiabilitiesCurrent
Other long-term liabilities	$ (21,598)	$ (41,459)
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilitiesNoncurrent	us-gaap:OtherLiabilitiesNoncurrent
Total operating lease liabilities	$ (57,314)	$ (91,623)
Financing leases
Other property and equipment, at cost	3,673	2,677
Accumulated depreciation	(2,134)	(1,324)
Net property and equipment	$ 1,539	1,353
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilitiesCurrent
Other current liabilities	$ (621)	(799)
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilitiesNoncurrent
Other long-term liabilities	$ (256)	(524)
Total financing lease liabilities	$ (877)	$ (1,323)