Leases (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jan. 01, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease assets	$ 17,522	$ 0
Operating lease liabilities	5,647	0
Non-current operating lease liabilities	12,326	0
Operating lease expense	6,893
Operating lease payments	6,530
Operating lease expense for which no liability or asset was recognized	275
Rent expense		8,186	$ 6,738
Operating lease, liability	$ 17,973
Operating lease, weighted average discount rate (percent)	4.60%
Operating lease, weighted average remaining lease term (years)	3 years 8 months 12 days
Operating lease income	$ 311
Operating lease income		$ 1,116	$ 1,474
Accounting Standards Update 2016-02 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease assets				$ 17,522
Operating lease liabilities				4,736
Non-current operating lease liabilities				$ 12,669