Leases - Supplemental Balance Sheet Information (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Operating Leases
Other noncurrent assets	$ 62,805
Accrued liabilities and other	13,340	$ 0
Other long-term liabilities	48,326
Total operating lease liabilities	61,666
Finance Leases
Property and equipment, gross	106,989
Accumulated depreciation	(47,178)
Property and equipment, net	59,811
Total finance lease liabilities	$ 75,744
Weighted Average Remaining Lease Term
Weighted-average remaining lease term - finance leases	2 years 4 months 9 days
Weighted-average remaining lease term - operating leases	4 years 11 months 15 days
Weighted Average Discount Rate
Weighted-average discount rate - finance leases	6.40%
Weighted-average discount rate - operating leases	5.19%