Leases (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019 USD ($) Option	Jun. 30, 2018 USD ($)	Jun. 30, 2019 USD ($) Option	Jun. 30, 2018 USD ($)	Jan. 01, 2019 USD ($)
Operating lease right-of-use assets	$ 8,278		$ 8,278		$ 9,200
Operating lease liabilities	10,098		$ 10,098		11,000
Initial term of lease			12 months
Operating lease cost	$ 1,090	$ 1,528	$ 2,231	$ 2,622
Number of options to renew lease | Option	1		1
Minimum
Renewal terms to extend the lease	1 year		1 year
Maximum
Renewal terms to extend the lease	5 years		5 years
Building
Operating lease cost	$ 857	1,199	$ 1,721	1,961
Automobile
Operating lease cost	$ 233	$ 329	$ 510	$ 661
Accounting Standards Update 2016-02 | Adjustment
Operating lease right-of-use assets					9,200
Accounting Standards Update 2016-02 | Adjustment | Other Accrued Expenses
Operating lease liabilities					2,500
Accounting Standards Update 2016-02 | Adjustment | Long Term Lease Liabilities
Operating lease liabilities					$ 8,500