Leases - Components of Lease Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Lease, Cost [Abstract]
Operating lease cost	$ 1,355	$ 1,214
Short-term lease cost	129	221
Variable lease cost	146	153
Total lease cost	1,630	1,588
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	$ 1,380	$ 1,307
Weighted-average remaining lease term — operating leases	5 years 10 months 24 days	6 years 10 months 24 days
Weighted-average discount rate — operating leases	4.70%	4.70%