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Leases, Codification Topic 842 (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Jan. 01, 2019
Lessee, Lease, Description [Line Items]      
Operating Lease, Payments $ 7,404    
Lessee, Operating Lease, Liability, Payments, Due 20,165    
Lessee, Operating Lease, Liability, Undiscounted Excess Amount 3,134    
Operating Lease, Liability 17,031   $ 22,000
Operating Leases, Future Minimum Payments Due 2,749    
Lessee, Operating Lease, Liability, Payments, Due Year Two 2,653    
Lessee, Operating Lease, Liability, Payments, Due Year Three 2,525    
Lessee, Operating Lease, Liability, Payments, Due Year Four 2,417    
Lessee, Operating Lease, Liability, Payments, Due Year Five 2,417    
Operating Lease, Expense 3,260 $ 3,087  
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability $ 529 $ 20,709  
Operating Lease, Weighted Average Remaining Lease Term 8 years 9 years  
Operating Lease, Weighted Average Discount Rate, Percent 4.21% 4.24%  
Operating Lease, Right-of-Use Asset $ 16,037 $ 18,492 $ 20,000
Lessee, Operating Lease, Term of Contract 10 years