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Note 16 - Fair Value Measurements and Fair Value of Financial Instruments - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Securities available-for-sale | $ 1,547,128 | $ 1,604,570
Equity securities | 34,429 | 40,406
Interest rate swaps | 39,958 | 54,268
Interest rate swaps | 36,319 | 45,762
Fair Value, Recurring [Member] |  |
Securities available-for-sale | 1,547,128 | 1,604,570
Equity securities | 32,890 | 40,406
Assets, fair value disclosure | 1,620,466 | 1,699,623
Liabilities, fair value disclosure | 37,104 | 45,937
Fair Value, Recurring [Member] | Interest Rate Swap [Member] |  |
Interest rate swaps | 39,958 | 54,268
Interest rate swaps | 36,319 | 45,762
Fair Value, Recurring [Member] | Foreign Exchange Contract [Member] |  |
Foreign exchange contracts | 490 | 379
Foreign exchange contracts | 785 | 175
Fair Value, Recurring [Member] | Mutual Funds [Member] |  |
Equity securities | 5,532 | 5,585
Fair Value, Recurring [Member] | Preferred Stock of Government Sponsored Entities [Member] |  |
Equity securities | 7,287 | 1,821
Fair Value, Recurring [Member] | Other Equity Securities [Member] |  |
Equity securities | 20,071 | 33,000
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member] |  |
Securities available-for-sale | 621,462 | 495,300
Equity securities | 32,890 | 40,406
Assets, fair value disclosure | 654,352 | 535,706
Liabilities, fair value disclosure | 0 | 0
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member] | Interest Rate Swap [Member] |  |
Interest rate swaps | 0 | 0
Interest rate swaps | 0 | 0
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member] | Foreign Exchange Contract [Member] |  |
Foreign exchange contracts |  |
Foreign exchange contracts | 0 | 0
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member] | Mutual Funds [Member] |  |
Equity securities | 5,532 | 5,585
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member] | Preferred Stock of Government Sponsored Entities [Member] |  |
Equity securities | 7,287 | 1,821
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member] | Other Equity Securities [Member] |  |
Equity securities | 20,071 | 33,000
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] |  |
Securities available-for-sale | 925,666 | 1,109,270
Equity securities | 0 | 0
Assets, fair value disclosure | 966,114 | 1,163,917
Liabilities, fair value disclosure | 37,104 | 45,937
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] | Interest Rate Swap [Member] |  |
Interest rate swaps | 39,958 | 54,268
Interest rate swaps | 36,319 | 45,762
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] | Foreign Exchange Contract [Member] |  |
Foreign exchange contracts | 490 | 379
Foreign exchange contracts | 785 | 175
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] | Mutual Funds [Member] |  |
Equity securities | 0 | 0
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] | Preferred Stock of Government Sponsored Entities [Member] |  |
Equity securities | 0 | 0
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] | Other Equity Securities [Member] |  |
Equity securities | 0 | 0
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member] |  |
Securities available-for-sale | 0 | 0
Equity securities | 0 | 0
Assets, fair value disclosure | 0 | 0
Liabilities, fair value disclosure | 0 | 0
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member] | Interest Rate Swap [Member] |  |
Interest rate swaps | 0 | 0
Interest rate swaps | 0 | 0
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member] | Foreign Exchange Contract [Member] |  |
Foreign exchange contracts | 0 | 0
Foreign exchange contracts | 0 | 0
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member] | Mutual Funds [Member] |  |
Equity securities | 0 | 0
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member] | Preferred Stock of Government Sponsored Entities [Member] |  |
Equity securities | 0 | 0
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member] | Other Equity Securities [Member] |  |
Equity securities | 0 | 0
US Treasury Securities [Member] |  |
Securities available-for-sale | 621,462 | 495,300
US Treasury Securities [Member] | Fair Value, Recurring [Member] |  |
Securities available-for-sale | 621,462 | 495,300
US Treasury Securities [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member] |  |
Securities available-for-sale | 621,462 | 495,300
US Treasury Securities [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] |  |
Securities available-for-sale | 0 | 0
US Treasury Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member] |  |
Securities available-for-sale | 0 | 0
US Government Corporations and Agencies Securities [Member] |  |
Securities available-for-sale | 9,149 | 48,169
US Government Corporations and Agencies Securities [Member] | Fair Value, Recurring [Member] |  |
Securities available-for-sale | 9,149 | 48,169
US Government Corporations and Agencies Securities [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member] |  |
Securities available-for-sale | 0 | 0
US Government Corporations and Agencies Securities [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] |  |
Securities available-for-sale | 9,149 | 48,169
US Government Corporations and Agencies Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member] |  |
Securities available-for-sale | 0 | 0
Commercial Mortgage-Backed Securities [Member] | Fair Value, Recurring [Member] |  |
Securities available-for-sale | 684,016 | 786,723
Commercial Mortgage-Backed Securities [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member] |  |
Securities available-for-sale | 0 | 0
Commercial Mortgage-Backed Securities [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] |  |
Securities available-for-sale | 684,016 | 786,723
Commercial Mortgage-Backed Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member] |  |
Securities available-for-sale | 0 | 0
Collateralized Mortgage Obligations [Member] |  |
Securities available-for-sale | 24,556 | 28,044
Collateralized Mortgage Obligations [Member] | Fair Value, Recurring [Member] |  |
Securities available-for-sale | 24,556 | 28,044
Collateralized Mortgage Obligations [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member] |  |
Securities available-for-sale | 0 | 0
Collateralized Mortgage Obligations [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] |  |
Securities available-for-sale | 24,556 | 28,044
Collateralized Mortgage Obligations [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member] |  |
Securities available-for-sale | 0 | 0
Corporate Debt Securities [Member] |  |
Securities available-for-sale | 207,945 | 246,334
Corporate Debt Securities [Member] | Fair Value, Recurring [Member] |  |
Securities available-for-sale | 207,945 | 246,334
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member] |  |
Securities available-for-sale | 0 | 0
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] |  |
Securities available-for-sale | 207,945 | 246,334
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member] |  |
Securities available-for-sale | $ 0 | $ 0

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