Leases (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($) Option	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Jan. 01, 2019 USD ($)
Operating lease right-of-use assets	$ 11,356	$ 10,580
Operating lease liabilities	$ 15,254	13,935
Initial term of lease	12 months
Number of options to renew lease | Option	1
Operating lease cost	$ 4,554	4,928	$ 4,900
Other information related to operating leases
Operating cash flows from operating leases	3,835	3,731
Right-of-use assets obtained in exchange for new lease liabilities	$ 3,549	4,924
Weighted-average discount rate	5.00%
Weighted average remaining lease term	6 years 9 months 18 days
Minimum
Renewal terms to extend the lease	1 year
Maximum
Renewal terms to extend the lease	5 years
Building
Operating lease cost	$ 2,978	3,397
Automobile
Operating lease cost	$ 1,576	$ 1,531
Accounting Standards Update 2016-02 | Adjustments.
Operating lease right-of-use assets				$ 9,200
Accounting Standards Update 2016-02 | Adjustments. | Other Accrued Expenses
Operating lease liabilities				2,500
Accounting Standards Update 2016-02 | Adjustments. | Long Term Lease Liabilities
Operating lease liabilities				$ 8,500