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The following table presents lease costs and other lease information. (Details) - USD ($)
9 Months Ended
Sep. 30, 2019
Dec. 31, 2018
Note 6. Leases    
Operating Lease Cost (Cost resulting from lease payments) $ 5,857,000  
Variable Lease Cost (Cost excluded from lease payments) 815,000  
Sublease Income (282,000)  
Net Lease Cost 6,390,000  
Operating Lease, Payments 6,382,000  
Operating Lease - Operating Cash Flows (Liability Reduction) 5,458,000  
Operating Lease, Right-of-Use Asset $ 26,552,000
Operating Lease, Weighted Average Remaining Lease Term 5 years 40 days 3 hours 36 minutes  
Operating Lease, Weighted Average Discount Rate, Percent 4.00%