Leases - Components of Operating 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, Cost	$ 2,120	$ 1,990	$ 4,166	$ 3,970
Less: Sublease income	(38)	(38)	(76)	(75)
Net lease cost	$ 2,082	$ 1,952	$ 4,090	$ 3,895