Leases - Components of Lease Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Leases [Abstract]
Operating lease	$ 3,908	$ 2,785	$ 7,072	$ 5,524
Short-term lease	403	627	930	1,318
Total lease expense	$ 4,311	$ 3,412	$ 8,002	$ 6,842