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Note 14 - Regulatory Matters - The Company's and Bank's Actual Capital Amounts and Ratios (Details) $ in Thousands | Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($)
--- | --- | ---
CET 1 Capital to risk weighted assets, amount | $ 1,634,837 | $ 1,473,831
CET 1 Capital to risk weighted assets, ratio | 0.1142 | 0.1091
CET 1 Capital to risk weighted assets, for capital adequacy purposes, amount | $ 644,441 | $ 607,690
CET 1 capital to risk weighted assets, for capital adequacy purposes, ratio | 4.50% | 4.50%
Tier 1 capital to risk weighted assets, amount | $ 1,635,337 | $ 1,474,331
Tier 1 capital to risk weighted assets, ratio | 0.1142 | 0.1092
Tier 1 capital to risk weighted assets, for capital adequacy purposes, amount | $ 859,255 | $ 810,253
Tier 1 capital to risk weighted assets, for capital adequacy purposes, ratio | 0.06 | 0.06
Total capital to risk weighted assets, amount | $ 1,847,146 | $ 1,680,974
Total capital to risk weighted assets, ratio | 0.129 | 0.1245
Total capital to risk weighted assets, for capital adequacy purposes, amount | $ 1,145,673 | $ 1,080,338
Total capital to risk weighted assets, for capital adequacy purposes, ratio | 0.08 | 0.08
Tier 1 capital to average assets, amount | $ 1,635,337 | $ 1,474,331
Tier 1 capital to average assets, ratio | 0.0959 | 0.0912
Tier 1 capital to average assets, for capital adequacy purposes, amount | $ 682,238 | $ 646,710
Tier 1 capital to average assets, for capital adequacy purposes, ratio | 0.04 | 0.04
Servisfirst Bank [Member] |  |
CET 1 Capital to risk weighted assets, amount | $ 1,694,412 | $ 1,535,757
CET 1 Capital to risk weighted assets, ratio | 0.1183 | 0.1137
CET 1 Capital to risk weighted assets, for capital adequacy purposes, amount | $ 644,402 | $ 607,665
CET 1 capital to risk weighted assets, for capital adequacy purposes, ratio | 4.50% | 4.50%
CET 1 capital to risk weighted assets, to be well capitalized under prompt corrective action provisions, amount | $ 930,803 | $ 877,738
CET 1 capital to risk weighted assets, to be well capitalized under prompt corrective action provisions, ratio | 6.50% | 6.50%
Tier 1 capital to risk weighted assets, amount | $ 1,694,912 | $ 1,536,257
Tier 1 capital to risk weighted assets, ratio | 0.1184 | 0.1138
Tier 1 capital to risk weighted assets, for capital adequacy purposes, amount | $ 859,203 | $ 810,220
Tier 1 capital to risk weighted assets, for capital adequacy purposes, ratio | 0.06 | 0.06
Tier 1 capital to risk weighted assets, to be well capitalized under prompt corrective action provisions, amount | $ 1,145,604 | $ 1,080,293
Tier 1 capital to risk weighted assets, to be well capitalized under prompt corrective action provisions, ratio | 0.08 | 0.08
Total capital to risk weighted assets, amount | $ 1,859,978 | $ 1,690,149
Total capital to risk weighted assets, ratio | 0.1299 | 0.1252
Total capital to risk weighted assets, for capital adequacy purposes, amount | $ 1,145,604 | $ 1,080,293
Total capital to risk weighted assets, for capital adequacy purposes, ratio | 0.08 | 0.08
Total capital to risk weighted assets, to be well capitalized under prompt corrective action provisions, amount | $ 1,432,005 | $ 1,350,366
Total capital to risk weighted assets, to be well capitalized under prompt corrective action provisions, ratio | 0.10 | 0.10
Tier 1 capital to average assets, amount | $ 1,694,912 | $ 1,536,257
Tier 1 capital to average assets, ratio | 0.0994 | 0.095
Tier 1 capital to average assets, for capital adequacy purposes, amount | $ 682,223 | $ 646,675
Tier 1 capital to average assets, for capital adequacy purposes, ratio | 0.04 | 0.04
Tier 1 capital to average assets, to be well capitalized under prompt corrective action provisions, amount | $ 852,779 | $ 808,343
Tier 1 capital to average assets, to be well capitalized under prompt corrective action provisions, ratio | 0.05 | 0.05

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- Definition The minimum CET One Capital Ratio (CET one capital divided by risk-weighted assets) required for capital adequacy purposes under the regulatory framework for prompt corrective action. + References No definition available. + Details
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- Definition Amount of total capital as defined by regulatory framework. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 505 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477270/942-505-50-1 + Details
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