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Note 6 - Fair Value Measurements and Fair Value of Financial Instruments - Assets and Liabilities Measured on a Recurring Basis (Details) - USD ($) $ in Thousands | Sep. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Securities available-for-sale | $ 623,629 | $ 534,507
Fair Value, Recurring [Member] |  |
Securities available-for-sale | 623,629 | 534,507
Equity securities | 15,563 | 13,794
Derivatives | 54,041 | 3,347
Total assets | 693,233 | 551,648
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Securities available-for-sale | 134 | 195
Equity securities | 9,701 | 11,081
Derivatives | 0 | 0
Total assets | 9,835 | 11,276
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Securities available-for-sale | 616,118 | 525,747
Equity securities | 5,862 | 2,713
Derivatives | 54,041 | 3,347
Total assets | 676,021 | 531,807
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Securities available-for-sale | 7,377 | 8,565
Equity securities | 0 | 0
Derivatives | 0 | 0
Total assets | 7,377 | 8,565
US Government Agencies Debt Securities [Member] |  |
Securities available-for-sale | 45,620 | 50,360
US Government Agencies Debt Securities [Member] | Fair Value, Recurring [Member] |  |
Securities available-for-sale | 45,620 | 50,360
US Government Agencies Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Securities available-for-sale | 0 | 0
US Government Agencies Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Securities available-for-sale | 45,620 | 50,360
US Government Agencies Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Securities available-for-sale | 0 | 0
Residential Mortgage-Backed Securities [Member] |  |
Securities available-for-sale | 406,985 | 316,095
Residential Mortgage-Backed Securities [Member] | Fair Value, Recurring [Member] |  |
Securities available-for-sale | 406,985 | 316,095
Residential Mortgage-Backed Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Securities available-for-sale | 0 | 0
Residential Mortgage-Backed Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Securities available-for-sale | 406,985 | 316,095
Residential Mortgage-Backed Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Securities available-for-sale | 0 | 0
Commercial Mortgage-Backed Securities [Member] |  |
Securities available-for-sale | 20,895 | 10,469
Commercial Mortgage-Backed Securities [Member] | Fair Value, Recurring [Member] |  |
Securities available-for-sale | 20,895 | 10,469
Commercial Mortgage-Backed Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Securities available-for-sale | 0 | 0
Commercial Mortgage-Backed Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Securities available-for-sale | 20,895 | 10,469
Commercial Mortgage-Backed Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Securities available-for-sale | 0 | 0
US States and Political Subdivisions Debt Securities [Member] |  |
Securities available-for-sale | 141,107 | 145,625
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Recurring [Member] |  |
Securities available-for-sale | 141,107 | 145,625
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Securities available-for-sale | 0 | 0
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Securities available-for-sale | 133,730 | 137,060
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Securities available-for-sale | 7,377 | 8,565
Corporate Debt Securities [Member] |  |
Securities available-for-sale | 6,990 | 9,049
Corporate Debt Securities [Member] | Fair Value, Recurring [Member] |  |
Securities available-for-sale | 6,990 | 9,049
Corporate Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Securities available-for-sale | 0 | 0
Corporate Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Securities available-for-sale | 6,990 | 9,049
Corporate Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Securities available-for-sale | 0 | 0
Asset-Backed Securities [Member] |  |
Securities available-for-sale | 1,898 | 2,564
Asset-Backed Securities [Member] | Fair Value, Recurring [Member] |  |
Securities available-for-sale | 1,898 | 2,564
Asset-Backed Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Securities available-for-sale | 0 | 0
Asset-Backed Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Securities available-for-sale | 1,898 | 2,564
Asset-Backed Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Securities available-for-sale | 0 | 0
Certificates of Deposit [Member] |  |
Securities available-for-sale |  | 150
Certificates of Deposit [Member] | Fair Value, Recurring [Member] |  |
Securities available-for-sale |  | 150
Certificates of Deposit [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Securities available-for-sale |  | 0
Certificates of Deposit [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Securities available-for-sale |  | 150
Certificates of Deposit [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Securities available-for-sale |  | 0
Other Debt Obligations [Member] |  |
Securities available-for-sale | 134 | 195
Other Debt Obligations [Member] | Fair Value, Recurring [Member] |  |
Securities available-for-sale | 134 | 195
Other Debt Obligations [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Securities available-for-sale | 134 | 195
Other Debt Obligations [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Securities available-for-sale | 0 | 0
Other Debt Obligations [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Securities available-for-sale | $ 0 | $ 0

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