Leases - Balance Sheet Classification of Lease Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Finance leases
Property and equipment, net	$ 431,193	$ 445,336
Total finance lease assets	431,193	445,336
Other current liabilities	42,434	38,795
Long-term finance lease liabilities	539,042	538,576
Present value of lease liabilities	581,476	577,371
Total operating lease assets	325,564	88,202
Other current liabilities	10,521	11,504
Long-term operating lease liabilities	350,463	84,292
Present value of lease liabilities	$ 360,984	$ 95,796
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilitiesCurrent	us-gaap:OtherLiabilitiesCurrent
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilitiesCurrent	us-gaap:OtherLiabilitiesCurrent