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
Lease, Cost [Abstract]
Operating lease cost	$ 1,394	$ 1,016	$ 2,749	$ 2,230
Short-term lease cost	124	340	253	561
Variable lease cost	116	131	262	284
Total lease cost	$ 1,634	$ 1,487	3,264	3,075
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases			$ 2,793	$ 2,702
Weighted-average remaining lease term — operating leases	5 years 1 month 6 days	6 years 10 months 24 days	5 years 1 month 6 days	6 years 10 months 24 days
Weighted-average discount rate — operating leases	4.90%	4.90%	4.90%	4.90%