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Income Taxes (Components of Income Tax Expense) (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2020
Dec. 31, 2019
Income Taxes [Abstract]                    
Current income tax expense: Federal                 $ 6,407 $ 4,761
Current income tax expense: State                 4,172 3,268
Current income tax expense                 10,579 8,029
Deferred income tax expense: Federal                 (1,122) 935
Deferred income tax expense: State                 (891) 345
Deferred income tax expense                 (2,013) 1,280
Income Tax Expense $ 2,904 $ 3,465 $ 1,121 $ 1,076 $ 2,188 $ 2,359 $ 2,317 $ 2,445 $ 8,566 $ 9,309