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Note 3 - Business Combination and Pending Acquisition - Monument Bancorp, Inc. - Pro Forma Information (Details) - Monument Bancorp, Inc [Member] - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018
Interest income | $ 68,817 | $ 66,528
Interest expense | 11,517 | 10,516
Net interest income | 57,300 | 56,012
Provision for loan losses | 894 | 1,059
Net interest income after provision for loan losses | 56,406 | 54,953
Noninterest income | 19,300 | 18,712
Net gains on securities | 23 | 2,763
Other noninterest expenses | 47,178 | 46,586
Income before income tax provision | 28,551 | 29,842
Income tax provision | 4,954 | 4,812
Net income | $ 23,597 | $ 25,030
Earnings per common share - basic (in dollars per share) | $ 1.65 | $ 1.84
Earnings per common share - diluted (in dollars per share) | $ 1.64 | $ 1.84

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