Leases - Lease Cost and Other Information (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	$ 2,763	$ 2,832	$ 5,571	$ 5,582
Variable lease payments	2	489	239	826
Cash paid for amounts included in the measurement of operating lease liabilities	$ 803	$ 798	$ 1,610	$ 1,586