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Leases - Lease Costs (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Leases      
Operating Lease Cost (Cost resulting from lease payments) $ 1,998 $ 1,863  
Variable Lease Cost (Cost excluded from lease payments) 267 244  
Sublease Income (87) (94)  
Net Lease Cost 2,178 2,013  
Operating Lease - Operating Cash Flows (Fixed Payments) 2,206 2,024  
Operating lease right-of-use assets $ 25,655 $ 28,928 $ 27,372
Weighted Average Lease Term - Operating Leases 4 years 10 months 2 days 5 years 6 months  
Weighted Average Discount Rate - Operating Leases 4.00% 4.00%