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Stock Incentive Plan Compensation Cost (Details) - USD ($)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost   $ 954,000  
Allocated Share-based Compensation Expense, Net of Tax $ 358,000 248,000 $ 620,000
Stock Unit Awards and Stock Awards [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Allocated Share-based Compensation Expense 453,000 314,000 954,000
Income Tax Expense (Benefit) $ (95,000) $ (66,000) $ (334,000)