Leases - Components of Lease Cost (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	$ 847	$ 864	$ 1,783	$ 1,738
Finance lease cost:
Amortization of right-of-use asset	35	42	69	85
Interest on lease liabilities	9	12	19	25
Sublease income	(72)	(69)	(144)	(69)
Total lease cost	$ 819	$ 849	$ 1,727	$ 1,779