Leases - Balance Sheet Information (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Jan. 01, 2019
Leases [Abstract]
Operating lease right-of-use assets	$ 34,463	$ 34,300
Operating - current	7,037
Operating - noncurrent	27,256
Total operating lease liabilities	34,293	$ 35,100
Property and equipment, gross	3,569
Accumulated amortization	(2,578)
Property and equipment, net	991
Other current liabilities	1,116
Other long-term liabilities	764
Total finance lease liabilities	$ 1,880