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Note 15 - Regulatory Matters - Actual Capital Amounts and Ratios (Details) $ in Thousands | Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($)
--- | --- | ---
Capital | $ 219,750 | $ 218,049
Capital to risk weighted assets | 0.143 | 0.14
Capital required for capital adequacy | $ 161,155 | $ 164,005
Capital required for capital adequacy to risk weighted assets | 10.50% | 10.50%
Tier one risk based capital | $ 201,749 | $ 200,187
Tier one risk based capital to risk weighted assets | 0.131 | 0.128
Tier one risk based capital required for capital adequacy | $ 130,459 | $ 132,766
Tier one risk based capital required for capital adequacy to risk weighted assets | 8.50% | 8.50%
Tier one leverage capital | $ 201,749 | $ 200,187
Tier one leverage capital to average assets | 0.092 | 0.09
Tier one leverage capital required for capital adequacy | $ 87,421 | $ 88,992
Tier one leverage capital required for capital adequacy to risk weighted assets | 0.04 | 0.04
Common equity tier one capital | $ 201,749 | $ 200,187
Common equity tier one risk based capital to risk weighted assets | 0.131 | 0.128
Common equity tier one capital required for capital adequacy | $ 107,436 | $ 109,337
Common equity tier one risk based capital required for capital adequacy to risk weighted assets | 7.00% | 7.00%
Boone Bank and Trust [Member] |  |
Capital | $ 16,446 | $ 16,232
Capital to risk weighted assets | 0.135 | 0.136
Capital required for capital adequacy | $ 12,809 | $ 12,510
Capital required for capital adequacy to risk weighted assets | 10.50% | 10.50%
Capital required to be well capitalized | $ 12,199 | $ 11,914
Capital required to be well capitalized to risk weighted assets | 0.10 | 0.10
Tier one risk based capital | $ 15,404 | $ 15,309
Tier one risk based capital to risk weighted assets | 0.126 | 0.128
Tier one risk based capital required for capital adequacy | $ 10,369 | $ 10,127
Tier one risk based capital required for capital adequacy to risk weighted assets | 8.50% | 8.50%
Tier one risk based capital required to be well capitalized | $ 9,759 | $ 9,532
Tier one risk based capital required to be well capitalized to risk weighted assets | 0.08 | 0.08
Tier one leverage capital | $ 15,404 | $ 15,309
Tier one leverage capital to average assets | 0.091 | 0.096
Tier one leverage capital required for capital adequacy | $ 6,743 | $ 6,393
Tier one leverage capital required for capital adequacy to risk weighted assets | 0.04 | 0.04
Tier one leverage capital required to be well capitalized | $ 8,429 | $ 7,991
Tier one leverage capital required to be well capitalized to average assets | 0.05 | 0.05
Common equity tier one capital | $ 15,404 | $ 15,309
Common equity tier one risk based capital to risk weighted assets | 0.126 | 0.128
Common equity tier one capital required for capital adequacy | $ 8,540 | $ 8,340
Common equity tier one risk based capital required for capital adequacy to risk weighted assets | 7.00% | 7.00%
Common equity tier one capital required to be well capitalized | $ 7,930 | $ 7,744
Common equity tier one capital required to be well capitalized to risk weighted assets | 6.50% | 6.50%
First National Bank [Member] | Also Conducts Business Out of 3 Full Service Offices in Des Moines Metro Area [Member] |  |
Capital | $ 112,663 | $ 112,057
Capital to risk weighted assets | 0.146 | 0.139
Capital required for capital adequacy | $ 81,211 | $ 84,863
Capital required for capital adequacy to risk weighted assets | 10.50% | 10.50%
Capital required to be well capitalized | $ 77,344 | $ 80,822
Capital required to be well capitalized to risk weighted assets | 0.10 | 0.10
Tier one risk based capital | $ 103,707 | $ 102,634
Tier one risk based capital to risk weighted assets | 0.134 | 0.127
Tier one risk based capital required for capital adequacy | $ 65,742 | $ 68,699
Tier one risk based capital required for capital adequacy to risk weighted assets | 8.50% | 8.50%
Tier one risk based capital required to be well capitalized | $ 61,875 | $ 64,658
Tier one risk based capital required to be well capitalized to risk weighted assets | 0.08 | 0.08
Tier one leverage capital | $ 103,707 | $ 102,634
Tier one leverage capital to average assets | 0.093 | 0.088
Tier one leverage capital required for capital adequacy | $ 44,595 | $ 46,878
Tier one leverage capital required for capital adequacy to risk weighted assets | 0.04 | 0.04
Tier one leverage capital required to be well capitalized | $ 55,744 | $ 58,597
Tier one leverage capital required to be well capitalized to average assets | 0.05 | 0.05
Common equity tier one capital | $ 103,707 | $ 102,634
Common equity tier one risk based capital to risk weighted assets | 0.134 | 0.127
Common equity tier one capital required for capital adequacy | $ 54,141 | $ 56,576
Common equity tier one risk based capital required for capital adequacy to risk weighted assets | 7.00% | 7.00%
Common equity tier one capital required to be well capitalized | $ 50,274 | $ 52,534
Common equity tier one capital required to be well capitalized to risk weighted assets | 6.50% | 6.50%
Iowa State Savings Bank [Member] |  |
Capital | $ 27,161 | $ 26,691
Capital to risk weighted assets | 0.151 | 0.157
Capital required for capital adequacy | $ 18,866 | $ 17,854
Capital required for capital adequacy to risk weighted assets | 10.50% | 10.50%
Capital required to be well capitalized | $ 17,967 | $ 17,004
Capital required to be well capitalized to risk weighted assets | 0.10 | 0.10
Tier one risk based capital | $ 24,915 | $ 24,619
Tier one risk based capital to risk weighted assets | 0.139 | 0.145
Tier one risk based capital required for capital adequacy | $ 15,272 | $ 14,453
Tier one risk based capital required for capital adequacy to risk weighted assets | 8.50% | 8.50%
Tier one risk based capital required to be well capitalized | $ 14,374 | $ 13,603
Tier one risk based capital required to be well capitalized to risk weighted assets | 0.08 | 0.08
Tier one leverage capital | $ 24,915 | $ 24,619
Tier one leverage capital to average assets | 0.095 | 0.096
Tier one leverage capital required for capital adequacy | $ 10,541 | $ 10,234
Tier one leverage capital required for capital adequacy to risk weighted assets | 0.04 | 0.04
Tier one leverage capital required to be well capitalized | $ 13,176 | $ 12,792
Tier one leverage capital required to be well capitalized to average assets | 0.05 | 0.05
Common equity tier one capital | $ 24,915 | $ 24,619
Common equity tier one risk based capital to risk weighted assets | 0.139 | 0.145
Common equity tier one capital required for capital adequacy | $ 12,577 | $ 11,903
Common equity tier one risk based capital required for capital adequacy to risk weighted assets | 7.00% | 7.00%
Common equity tier one capital required to be well capitalized | $ 11,679 | $ 11,052
Common equity tier one capital required to be well capitalized to risk weighted assets | 6.50% | 6.50%
Reliance State Bank [Member] | Conducts Business Out of Offices at Story City, Garner, and Kleme, Iowa [Member] |  |
Capital | $ 29,222 | $ 28,755
Capital to risk weighted assets | 0.122 | 0.119
Capital required for capital adequacy | $ 25,232 | $ 25,293
Capital required for capital adequacy to risk weighted assets | 10.50% | 10.50%
Capital required to be well capitalized | $ 24,030 | $ 24,089
Capital required to be well capitalized to risk weighted assets | 0.10 | 0.10
Tier one risk based capital | $ 26,237 | $ 25,937
Tier one risk based capital to risk weighted assets | 0.109 | 0.108
Tier one risk based capital required for capital adequacy | $ 20,426 | $ 20,476
Tier one risk based capital required for capital adequacy to risk weighted assets | 8.50% | 8.50%
Tier one risk based capital required to be well capitalized | $ 19,224 | $ 19,271
Tier one risk based capital required to be well capitalized to risk weighted assets | 0.08 | 0.08
Tier one leverage capital | $ 26,237 | $ 25,937
Tier one leverage capital to average assets | 0.086 | 0.083
Tier one leverage capital required for capital adequacy | $ 12,160 | $ 12,464
Tier one leverage capital required for capital adequacy to risk weighted assets | 0.04 | 0.04
Tier one leverage capital required to be well capitalized | $ 15,200 | $ 15,580
Tier one leverage capital required to be well capitalized to average assets | 0.05 | 0.05
Common equity tier one capital | $ 26,237 | $ 25,937
Common equity tier one risk based capital to risk weighted assets | 0.109 | 0.108
Common equity tier one capital required for capital adequacy | $ 16,821 | $ 16,862
Common equity tier one risk based capital required for capital adequacy to risk weighted assets | 7.00% | 7.00%
Common equity tier one capital required to be well capitalized | $ 15,620 | $ 15,658
Common equity tier one capital required to be well capitalized to risk weighted assets | 6.50% | 6.50%
State Bank and Trust [Member] |  |
Capital | $ 22,435 | $ 22,283
Capital to risk weighted assets | 0.16 | 0.16
Capital required for capital adequacy | $ 14,719 | $ 14,597
Capital required for capital adequacy to risk weighted assets | 10.50% | 10.50%
Capital required to be well capitalized | $ 14,018 | $ 13,902
Capital required to be well capitalized to risk weighted assets | 0.10 | 0.10
Tier one risk based capital | $ 20,734 | $ 20,676
Tier one risk based capital to risk weighted assets | 0.148 | 0.149
Tier one risk based capital required for capital adequacy | $ 11,915 | $ 11,817
Tier one risk based capital required for capital adequacy to risk weighted assets | 8.50% | 8.50%
Tier one risk based capital required to be well capitalized | $ 11,214 | $ 11,122
Tier one risk based capital required to be well capitalized to risk weighted assets | 0.08 | 0.08
Tier one leverage capital | $ 20,734 | $ 20,676
Tier one leverage capital to average assets | 0.102 | 0.096
Tier one leverage capital required for capital adequacy | $ 8,096 | $ 8,573
Tier one leverage capital required for capital adequacy to risk weighted assets | 0.04 | 0.04
Tier one leverage capital required to be well capitalized | $ 10,120 | $ 10,717
Tier one leverage capital required to be well capitalized to average assets | 0.05 | 0.05
Common equity tier one capital | $ 20,734 | $ 20,676
Common equity tier one risk based capital to risk weighted assets | 0.148 | 0.149
Common equity tier one capital required for capital adequacy | $ 9,812 | $ 9,731
Common equity tier one risk based capital required for capital adequacy to risk weighted assets | 7.00% | 7.00%
Common equity tier one capital required to be well capitalized | $ 9,112 | $ 9,036
Common equity tier one capital required to be well capitalized to risk weighted assets | 6.50% | 6.50%
United Bank and Trust [Member] |  |
Capital | $ 13,205 | $ 12,989
Capital to risk weighted assets | 0.164 | 0.161
Capital required for capital adequacy | $ 8,479 | $ 8,486
Capital required for capital adequacy to risk weighted assets | 10.50% | 10.50%
Capital required to be well capitalized | $ 8,075 | $ 8,082
Capital required to be well capitalized to risk weighted assets | 0.10 | 0.10
Tier one risk based capital | $ 12,198 | $ 11,979
Tier one risk based capital to risk weighted assets | 0.151 | 0.148
Tier one risk based capital required for capital adequacy | $ 6,864 | $ 6,870
Tier one risk based capital required for capital adequacy to risk weighted assets | 8.50% | 8.50%
Tier one risk based capital required to be well capitalized | $ 6,460 | $ 6,466
Tier one risk based capital required to be well capitalized to risk weighted assets | 0.08 | 0.08
Tier one leverage capital | $ 12,198 | $ 11,979
Tier one leverage capital to average assets | 0.096 | 0.095
Tier one leverage capital required for capital adequacy | $ 5,084 | $ 5,039
Tier one leverage capital required for capital adequacy to risk weighted assets | 0.04 | 0.04
Tier one leverage capital required to be well capitalized | $ 6,356 | $ 6,299
Tier one leverage capital required to be well capitalized to average assets | 0.05 | 0.05
Common equity tier one capital | $ 12,198 | $ 11,979
Common equity tier one risk based capital to risk weighted assets | 0.151 | 0.148
Common equity tier one capital required for capital adequacy | $ 5,653 | $ 5,657
Common equity tier one risk based capital required for capital adequacy to risk weighted assets | 7.00% | 7.00%
Common equity tier one capital required to be well capitalized | $ 5,249 | $ 5,253
Common equity tier one capital required to be well capitalized to risk weighted assets | 6.50% | 6.50%

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