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Leases (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Lessee, Lease, Description [Line Items]      
Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year $ 4,043    
Operating Lease, Right-of-Use Asset 13,636 $ 14,843  
Operating Lease, Cost 3,207 3,301  
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability 1,623 5,208 $ 0
Short-term Lease, Cost 201 288  
Lease, Cost 3,408 3,589  
Operating Lease, Liability $ 14,152 $ 15,461  
Operating Lease, Weighted Average Remaining Lease Term 5 years 6 years  
Operating Lease, Weighted Average Discount Rate, Percent 2.50% 2.70%  
Lessee, Operating Lease, Liability, Payments, Due Year Two $ 2,988    
Lessee, Operating Lease, Liability, Payments, Due Year Three 2,622    
Lessee, Operating Lease, Liability, Payments, Due Year Four 2,190    
Lessee, Operating Lease, Liability, Payments, Due Year Five 978    
Lessee, Operating Lease, Liability, Payments, Due after Year Five 2,266    
Lessee, Operating Lease, Liability, Payments, Due 15,087    
Present Value Adjustment 935    
Operating Lease, Lease Income, Lease Payments 1,800 $ 900  
Operating Lease, Payments $ 3,300    
Maximum [Member]      
Lessee, Lease, Description [Line Items]      
Lessee, Operating Lease, Renewal Term 5 years