Leases (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Leases [Abstract]
Operating lease expense	$ 6,500
Variable lease expenses	$ 1,300
Rent expense		$ 2,900	$ 3,000
Weighted-average remaining operating lease term	4 years 6 months
Weighted-average operating lease discount rate	5.40%
Cash payments on operating lease liabilities	$ 8,700
Lease liabilities from new ROU assets	6,700
Sublease income	$ 1,400	$ 1,300	$ 600