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Note 20 - Regulatory Matters - Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations (Details) $ in Thousands | Sep. 30, 2024 USD ($) | Dec. 31, 2023 USD ($)
--- | --- | ---
Banking Regulation, Common Equity Tier 1 Risk-Based Capital, Actual |  | $ 379,074 | $ 367,445
Banking Regulation, Common Equity Tier 1 Risk-Based Capital Ratio, Actual |  | 0.1073 | 0.114
Banking Regulation, Common Equity Tier 1 Risk-Based Capital, Capital Adequacy, Minimum |  | $ 158,974 | $ 145,101
Banking Regulation, Common Equity Tier 1 Risk-Based Capital Ratio, Capital Adequacy, Minimum |  | 0.045 | 0.045
Banking Regulation, Common Equity Tier 1 Risk-Based Capital, Well Capitalized, Minimum | [1] | $ 229,629 | $ 209,590
Banking Regulation, Common Equity Tier 1 Risk-Based Capital Ratio, Well Capitalized, Minimum | [1] | 0.065 | 0.065
Banking Regulation, Tier 1 Risk-Based Capital, Actual |  | $ 379,074 | $ 367,445
Banking Regulation, Tier 1 Risk-Based Capital Ratio, Actual |  | 0.1073 | 0.114
Banking Regulation, Tier 1 Risk-Based Capital, Capital Adequacy, Minimum |  | $ 211,966 | $ 193,468
Banking Regulation, Tier 1 Risk-Based Capital Ratio, Capital Adequacy, Minimum |  | 0.06 | 0.06
Banking Regulation, Tier 1 Risk-Based Capital, Well Capitalized, Minimum | [1] | $ 282,621 | $ 257,957
Banking Regulation, Tier 1 Risk-Based Capital Ratio, Well Capitalized, Minimum | [1] | 0.08 | 0.08
Banking Regulation, Total Capital, Actual |  | $ 423,265 | $ 403,501
Banking Regulation, Total Risk-Based Capital Ratio, Actual |  | 0.1198 | 0.1251
Banking Regulation, Total Risk-Based Capital, Capital Adequacy, Minimum |  | $ 282,621 | $ 257,957
Banking Regulation, Total Risk-Based Capital Ratio, Capital Adequacy, Minimum |  | 0.08 | 0.08
Banking Regulation, Total Risk-Based Capital, Well Capitalized, Minimum | [1] | $ 353,276 | $ 322,446
Banking Regulation, Total Risk-Based Capital Ratio, Well Capitalized, Minimum | [1] | 0.10 | 0.10
Banking Regulation, Tier 1 Leverage Capital, Actual |  | $ 379,074 | $ 367,445
Banking Regulation, Tier 1 Leverage Capital Ratio, Actual |  | 0.089 | 0.0992
Banking Regulation, Tier 1 Leverage Capital, Capital Adequacy, Minimum |  | $ 170,336 | $ 148,186
Banking Regulation, Tier 1 Leverage Capital Ratio, Capital Adequacy, Minimum |  | 0.04 | 0.04
Banking Regulation, Tier 1 Leverage Capital, Well Capitalized, Minimum | [1] | $ 212,920 | $ 185,232
Banking Regulation, Tier 1 Leverage Capital Ratio, Well Capitalized, Minimum | [1] | 0.05 | 0.05
Subsidiaries [Member] |  |  |
Banking Regulation, Common Equity Tier 1 Risk-Based Capital, Actual | [1] | $ 394,381 | $ 382,578
Banking Regulation, Common Equity Tier 1 Risk-Based Capital Ratio, Actual | [1] | 0.1112 | 0.1182
Banking Regulation, Common Equity Tier 1 Risk-Based Capital, Capital Adequacy, Minimum | [1] | $ 159,542 | $ 145,605
Banking Regulation, Common Equity Tier 1 Risk-Based Capital Ratio, Capital Adequacy, Minimum | [1] | 0.045 | 0.045
Banking Regulation, Tier 1 Risk-Based Capital, Actual | [1] | $ 403,422 | $ 391,534
Banking Regulation, Tier 1 Risk-Based Capital Ratio, Actual | [1] | 0.1138 | 0.121
Banking Regulation, Tier 1 Risk-Based Capital, Capital Adequacy, Minimum | [1] | $ 212,722 | $ 194,139
Banking Regulation, Tier 1 Risk-Based Capital Ratio, Capital Adequacy, Minimum | [1] | 0.06 | 0.06
Banking Regulation, Total Capital, Actual | [1] | $ 497,768 | $ 477,590
Banking Regulation, Total Risk-Based Capital Ratio, Actual | [1] | 0.1404 | 0.1476
Banking Regulation, Total Risk-Based Capital, Capital Adequacy, Minimum | [1] | $ 283,629 | $ 258,853
Banking Regulation, Total Risk-Based Capital Ratio, Capital Adequacy, Minimum | [1] | 0.08 | 0.08
Banking Regulation, Tier 1 Leverage Capital, Actual | [1] | $ 403,422 | $ 391,534
Banking Regulation, Tier 1 Leverage Capital Ratio, Actual | [1] | 0.093 | 0.1057
Banking Regulation, Tier 1 Leverage Capital, Capital Adequacy, Minimum | [1] | $ 173,498 | $ 148,111
Banking Regulation, Tier 1 Leverage Capital Ratio, Capital Adequacy, Minimum | [1] | 0.04 | 0.04
[1] | Minimum to be Well Capitalized Under Prompt Corrective Action” is not formally defined under applicable banking regulations for bank holding companies.

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- Definition Ratio of minimum Common Equity Tier 1 risk-based capital to risk-weighted assets required for capital adequacy 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 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 505 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Publisher FASB -URI https://asc.fasb.org/1943274/2147477270/942-505-50-1B + Details
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