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Income Taxes
9 Months Ended
Sep. 30, 2021
Income Tax Disclosure [Abstract]  
Income Taxes Income TaxesFederal income tax expense for the nine months ended September 30, 2021 and 2020 was computed using the consolidated effective federal tax rate.  The Company also recognized income tax expense pertaining to state franchise taxes payable individually by the subsidiary bank.  The Company files a consolidated tax return for federal purposes and separate tax returns for State of Iowa purposes.  The tax years ended December 31, 2020, 2019, and 2018 remain subject to examination by the Internal Revenue Service.  For state tax purposes, the tax years ended December 31, 2020, 2019, and 2018 remain open for examination.  There were no material unrecognized tax benefits at September 30, 2021  and December 31, 2020 and therefore no interest or penalties on unrecognized tax benefits has been recorded.  As of September 30, 2021, the Company does not anticipate any significant increase in unrecognized tax benefits during the twelve-month period ending September 30, 2022. Income taxes as a percentage of income before taxes were 22.58% for the nine months ended September 30, 2021 and 22.43% for the same period in 2020.