Leases - Schedule of Components of Lease Expense (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Lease Cost [Abstract]
Operating lease expense		$ 991		$ 1,733
Short-term lease expense	[1]	151		552
Total		1,142	$ 900	2,285	$ 1,600
Less: Sublease income		(9)		(12)
Total lease expense		$ 1,133		$ 2,273

[1] Short-term lease expense includes all leases with lease terms ranging from less than one month to one year.