Leases - Components of Lease Expense (Details) - USD ($) $ in Thousands			3 Months Ended		9 Months Ended
	Sep. 30, 2020	Dec. 31, 2019	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Leases [Abstract]
Operating lease cost			$ 1,784	$ 1,489	$ 5,172	$ 3,832
Amortization of lease expense	$ 300	$ 300	26	26	78	76
Interest on lease liabilities			3	4	11	13
Sublease income			(206)	(103)	(567)	(309)
Total finance lease cost, net			$ 1,607	$ 1,416	$ 4,694	$ 3,612