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Leases - Lease Cost (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Leases [Abstract]      
Operating lease cost $ 4,758 $ 4,717  
Short-term lease cost 49 49  
Variable lease cost 947 967  
Sublease income (24) (55)  
Total net lease cost during the period 5,730 5,678  
Operating cash used for amounts included in the measurement of lease liabilities during the period 5,004 4,881  
ROU assets obtained in exchange for lease liabilities during the period $ 13,966 $ 1,265 $ 1,505
Weighted average remaining lease term of operating leases, in years, at period end 7 years 1 month 6 days 7 years 2 months 12 days  
Weighted average discount rate of operating leases, at period end 2.32% 3.12%  
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Prepaid Expense and Other Assets Prepaid Expense and Other Assets