Leases - Components of Lease Expense (Details) - USD ($) $ in Thousands			3 Months Ended		6 Months Ended
	Jun. 30, 2020	Dec. 31, 2019	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Leases [Abstract]
Operating lease cost			$ 1,446	$ 1,240	$ 3,388	$ 2,343
Amortization of lease expense	$ 300	$ 300	35	25	61	50
Interest on lease liabilities			4	4	7	9
Sublease income			(226)	(106)	(360)	(206)
Total finance lease cost, net			$ 1,259	$ 1,163	$ 3,096	$ 2,196