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Accumulated Other Comprehensive Income (Reclassifications Out of Other Comprehensive Income) (Details) - Reclassification out of Accumulated Other Comprehensive Income [Member] - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]        
Interest-rate contract $ 450 $ 476 $ 1,361 $ 1,525
Gain on sale of investments 0 0 0 4,728
Tax effect from changes in tax rates 2 1 5 1
Total $ 452 $ 477 $ 1,366 $ 6,254