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Note 19 - Regulatory Matters - Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations (Details) $ in Thousands | Sep. 30, 2025 USD ($) | Dec. 31, 2024 USD ($)
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Banking Regulation, Common Equity Tier 1 Risk-Based Capital, Actual |  | $ 488,376 | $ 449,497
Banking Regulation, Common Equity Tier 1 Risk-Based Capital Ratio, Actual |  | 0.11 | 0.1018
Banking Regulation, Common Equity Tier 1 Risk-Based Capital, Capital Adequacy, Minimum |  | $ 199,868 | $ 198,743
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] | $ 288,698 | $ 287,074
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 |  | $ 488,376 | $ 449,497
Banking Regulation, Tier 1 Risk-Based Capital Ratio, Actual |  | 0.11 | 0.1018
Banking Regulation, Tier 1 Risk-Based Capital, Capital Adequacy, Minimum |  | $ 266,490 | $ 264,991
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] | $ 355,321 | $ 353,322
Banking Regulation, Tier 1 Risk-Based Capital Ratio, Well Capitalized, Minimum | [1] | 0.08 | 0.08
Banking Regulation, Total Capital, Actual |  | $ 544,023 | $ 504,857
Banking Regulation, Total Risk-Based Capital Ratio, Actual |  | 0.1225 | 0.1143
Banking Regulation, Total Risk-Based Capital, Capital Adequacy, Minimum |  | $ 355,321 | $ 353,322
Banking Regulation, Total Risk-Based Capital Ratio, Capital Adequacy, Minimum |  | 0.08 | 0.08
Banking Regulation, Total Risk-Based Capital, Well Capitalized, Minimum | [1] | $ 444,151 | $ 441,652
Banking Regulation, Total Risk-Based Capital Ratio, Well Capitalized, Minimum | [1] | 0.10 | 0.10
Banking Regulation, Tier 1 Leverage Capital, Actual |  | $ 488,376 | $ 449,497
Banking Regulation, Tier 1 Leverage Capital Ratio, Actual |  | 0.0931 | 0.0869
Banking Regulation, Tier 1 Leverage Capital, Capital Adequacy, Minimum |  | $ 209,767 | $ 206,832
Banking Regulation, Tier 1 Leverage Capital Ratio, Capital Adequacy, Minimum |  | 0.04 | 0.04
Banking Regulation, Tier 1 Leverage Capital, Well Capitalized, Minimum | [1] | $ 262,208 | $ 258,540
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] | $ 487,811 | $ 443,833
Banking Regulation, Common Equity Tier 1 Risk-Based Capital Ratio, Actual | [1] | 0.1084 | 0.0991
Banking Regulation, Common Equity Tier 1 Risk-Based Capital, Capital Adequacy, Minimum | [1] | $ 202,452 | $ 201,441
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] | $ 496,966 | $ 452,903
Banking Regulation, Tier 1 Risk-Based Capital Ratio, Actual | [1] | 0.1105 | 0.1012
Banking Regulation, Tier 1 Risk-Based Capital, Capital Adequacy, Minimum | [1] | $ 269,936 | $ 268,588
Banking Regulation, Tier 1 Risk-Based Capital Ratio, Capital Adequacy, Minimum | [1] | 0.06 | 0.06
Banking Regulation, Total Capital, Actual | [1] | $ 603,322 | $ 559,002
Banking Regulation, Total Risk-Based Capital Ratio, Actual | [1] | 0.1341 | 0.1249
Banking Regulation, Total Risk-Based Capital, Capital Adequacy, Minimum | [1] | $ 359,915 | $ 358,118
Banking Regulation, Total Risk-Based Capital Ratio, Capital Adequacy, Minimum | [1] | 0.08 | 0.08
Banking Regulation, Tier 1 Leverage Capital, Actual | [1] | $ 496,966 | $ 452,903
Banking Regulation, Tier 1 Leverage Capital Ratio, Actual | [1] | 0.0949 | 0.0865
Banking Regulation, Tier 1 Leverage Capital, Capital Adequacy, Minimum | [1] | $ 209,439 | $ 209,532
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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