Leases - Schedule of Components of Lease Expense (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019
Leases [Abstract]
Amortization of leased assets	$ 12	$ 36
Interest of lease liabilities	2	5
Operating lease cost	3,924	10,444
Short-term lease cost	134	283
Total lease cost before subleases	4,072	10,768
Sublease income	(1,378)	(4,078)
Total lease cost, net	$ 2,694	$ 6,690