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Lease Commitments (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Other Commitments [Line Items]        
Operating Lease, Cost   $ 16,956    
Short-term Lease, Cost   369    
Sublease Income   286    
Other Asset Impairment Charges   $ 2,107 $ 0 $ 0
Rent expense     $ 13,900 $ 10,500
Lessee, Operating Lease, Lease Not Yet Commenced, Option To Extend, Value $ 0      
Operating Lease, Weighted Average Discount Rate, Percent 4.70% 4.70%    
Operating Lease, Weighted Average Remaining Lease Term 8 years 1 month 6 days 8 years 1 month 6 days    
Operating Lease, Payments   $ 14,183    
Occupancy        
Other Commitments [Line Items]        
Operating Lease, Cost   15,931    
Variable Lease, Cost   118    
Occupancy | Disposal Group, Disposed of by Means Other than Sale, Not Discontinued Operations        
Other Commitments [Line Items]        
Operating Lease, Cost   1,500    
Other Asset Impairment Charges   2,100    
Occupancy | Disposal Group, Disposed of by Means Other than Sale, Not Discontinued Operations, Abandonment [Member]        
Other Commitments [Line Items]        
Impairment of Long-Lived Assets to be Disposed of   600    
Compensation and Benefits        
Other Commitments [Line Items]        
Operating Lease, Cost   519    
Communication and Technology        
Other Commitments [Line Items]        
Operating Lease, Cost   $ 305