Leases - Components of Lease Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Lease expense
Short-term operating lease	$ 5,691
Long-term operating lease	8,681
Total operating lease expense	14,372
Amortization of right-of-use assets	19,171
Interest on lease liabilities	5,005
Total finance lease expense	$ 24,176
Operating leases
Weighted average remaining lease term	3 years 1 month 6 days
Weighted average discount rate	14.80%
Finance leases
Weighted average remaining lease term	2 years 1 month 6 days
Weighted average discount rate	8.20%
Supplemental cash flow
Operating cash outflows from operating leases	$ 14,372
Operating cash outflows from finance leases	5,005
Financing cash outflows from finance leases	29,364
Operating leases	2,477
Finance leases	7,941
Assets and Liabilities
Operating lease right of use assets	14,540
Operating lease right-of-use liabilities, current portion	4,906
Operating lease right-of-use liabilities, long-term portion	9,634
Total operating lease liabilities	14,540
Property and equipment, at cost	71,768
Less accumulated amortization	(27,727)
Property and equipment, net	44,041
Current portion of finance leases	18,738
Long-term finance leases	17,160
Total finance lease liabilities	$ 35,898
Operating lease right-of-use assets		$ 20,819
Operating lease right-of-use liabilities, current portion		5,649
Operating lease right-of-use liabilities, long-term portion		15,170
Total operating lease liabilities		20,819
Property and equipment, at cost		67,585
Less accumulated amortization		(16,634)
Property and equipment, net		50,951
Current portion of long-term debt		20,061
Long-term debt		29,865
Total finance lease liabilities		$ 49,926