Leases - Finance and Operating Lease Information (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019	Dec. 31, 2018
Finance lease cost
Amortization of right-of-use assets	$ 360	$ 1,043
Interest expense	75	184
Operating lease cost	3,461	10,294
Short-term lease cost	131	342
Total lease cost	4,027	11,863
Assets
Operating lease right-of-use assets	67,885	67,885	$ 0
Finance lease right-of-use assets	14,268	14,268
Lease, right-of-use asset	82,153	82,153
Current liabilities
Operating lease liabilities	7,047	7,047	0
Finance lease liabilities	2,839	2,839
Non-current liabilities
Operating lease liabilities	68,479	68,479	$ 0
Finance lease liabilities	9,268	9,268
Total lease liabilities	$ 87,633	$ 87,633