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Accumulated Other Comprehensive Income (Reclassifications out of other comprehensive income) (Details) - Reclassification out of Accumulated Other Comprehensive Income [Member] - USD ($)
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]    
Interest-rate contract $ 110,000 $ 217,000
Gain On Sale Of Investments 4,728,000 0
Tax effect from changes in tax rates 0 (17,000)
Total $ 4,838,000 $ 200,000