Leases - Supplemental Balance Sheet Information (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Weighted Average Discount Rate
Weighted-average discount rate - finance leases	5.33%	5.37%
Weighted-average discount rate - operating leases	5.19%	5.18%
Operating Leases
Other assets, non-current	$ 35,436	$ 40,511
Finance Leases
Property and equipment, gross	99,756	104,433
Accumulated depreciation	(53,290)	(60,272)
Property and equipment, net	46,466	44,161
Total finance lease liabilities	$ 46,442	$ 47,911
Weighted Average Remaining Lease Term
Weighted-average remaining lease term - finance leases	1 year 6 months 3 days	1 year 4 months 9 days
Weighted-average remaining lease term - operating leases	3 years 7 months 2 days	4 years
Capital Lease Obligations
Finance Leases
Debt, non-current	$ 17,566	$ 25,837
Other Current Liabilities
Operating Leases
Accrued liabilities and other	11,604	12,410
Other Noncurrent Liabilities
Operating Leases
Other long-term liabilities	22,929	27,433
Other Liabilities
Operating Leases
Total operating lease liabilities	34,533	39,843
Capital Lease Obligations
Finance Leases
Debt, current	$ 28,876	$ 22,074