Leases - Supplemental Balance Sheet Information (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Weighted Average Discount Rate
Weighted-average discount rate - finance leases	5.37%	5.40%
Weighted-average discount rate - operating leases	5.18%	5.20%
Operating Leases
Other assets, non-current	$ 40,511	$ 49,169
Finance Leases
Property and equipment, gross	104,433	103,903
Accumulated depreciation	(60,272)	(42,209)
Property and equipment, net	44,161	61,694
Total finance lease liabilities	$ 47,911	$ 68,612
Weighted Average Remaining Lease Term
Weighted-average remaining lease term - finance leases	1 year 4 months 9 days	1 year 8 months 23 days
Weighted-average remaining lease term - operating leases	4 years	4 years 8 months 12 days
Other Current Liabilities
Operating Leases
Accrued liabilities and other	$ 12,410	$ 13,104
Other Noncurrent Liabilities
Operating Leases
Other long-term liabilities	27,433	40,634
Other Liabilities
Operating Leases
Total operating lease liabilities	39,843	53,738
Capital Lease Obligations
Finance Leases
Debt, current	$ 22,074	$ 22,746