Lease Commitments - Components of Lease Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Lease cost
Operating lease cost	$ 6,210	$ 5,381	$ 4,699
Short-term lease cost	747	738	830
Variable lease cost	973	464	591
Total lease cost	7,930	6,583	6,120
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	6,609	5,690	4,908
ROU Assets obtained in exchange for lease obligations	$ 7,143	$ 5,410	$ 21,366
Weighted-average remaining lease term — operating leases	4 years 6 months	5 years 4 months 24 days	6 years 2 months 12 days
Weighted-average discount rate — operating leases	4.20%	4.50%	4.70%