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Note 13 - Fair Value Measurements and Fair Value of Financial Instruments - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Securities available-for-sale | $ 1,508,798 | $ 1,473,348
Equity securities | 31,456 | 22,158
Assets, fair value disclosure | 1,624,588 | 1,540,447
Liabilities, fair value disclosure | 56,997 | 52,806
Mutual Funds [Member] |  |
Equity securities | 5,337 | 5,509
Preferred Stock of Government Sponsored Entities [Member] |  |
Equity securities | 1,378 | 1,289
Other Equity Securities [Member] |  |
Equity securities | 24,741 | 15,360
Warrant [Member] |  |
Assets, fair value disclosure | 42 | 50
Interest Rate Swap [Member] |  |
Assets, fair value disclosure | 83,434 | 44,443
Liabilities, fair value disclosure | 56,058 | 51,864
Foreign Exchange Contract [Member] |  |
Assets, fair value disclosure | 858 | 448
Liabilities, fair value disclosure | 939 | 942
Fair Value, Inputs, Level 1 [Member] |  |
Securities available-for-sale | 392,842 | 240,500
Equity securities | 31,456 | 22,158
Assets, fair value disclosure | 424,298 | 262,658
Liabilities, fair value disclosure | 0 | 0
Fair Value, Inputs, Level 1 [Member] | Mutual Funds [Member] |  |
Equity securities | 5,337 | 5,509
Fair Value, Inputs, Level 1 [Member] | Preferred Stock of Government Sponsored Entities [Member] |  |
Equity securities | 1,378 | 1,289
Fair Value, Inputs, Level 1 [Member] | Other Equity Securities [Member] |  |
Equity securities | 24,741 | 15,360
Fair Value, Inputs, Level 1 [Member] | Warrant [Member] |  |
Assets, fair value disclosure | 0 | 0
Fair Value, Inputs, Level 1 [Member] | Interest Rate Swap [Member] |  |
Assets, fair value disclosure | 0 | 0
Liabilities, fair value disclosure | 0 | 0
Fair Value, Inputs, Level 1 [Member] | Foreign Exchange Contract [Member] |  |
Assets, fair value disclosure | 0 | 0
Liabilities, fair value disclosure | 0 | 0
Fair Value, Inputs, Level 2 [Member] |  |
Securities available-for-sale | 1,115,956 | 1,232,848
Equity securities | 0 | 0
Assets, fair value disclosure | 1,200,248 | 1,277,739
Liabilities, fair value disclosure | 56,997 | 52,806
Fair Value, Inputs, Level 2 [Member] | Mutual Funds [Member] |  |
Equity securities | 0 | 0
Fair Value, Inputs, Level 2 [Member] | Preferred Stock of Government Sponsored Entities [Member] |  |
Equity securities | 0 | 0
Fair Value, Inputs, Level 2 [Member] | Other Equity Securities [Member] |  |
Equity securities | 0 | 0
Fair Value, Inputs, Level 2 [Member] | Warrant [Member] |  |
Assets, fair value disclosure | 0 | 0
Fair Value, Inputs, Level 2 [Member] | Interest Rate Swap [Member] |  |
Assets, fair value disclosure | 83,434 | 44,443
Liabilities, fair value disclosure | 56,058 | 51,864
Fair Value, Inputs, Level 2 [Member] | Foreign Exchange Contract [Member] |  |
Assets, fair value disclosure | 858 | 448
Liabilities, fair value disclosure | 939 | 942
Fair Value, Inputs, Level 3 [Member] |  |
Securities available-for-sale | 0 | 0
Equity securities | 0 | 0
Assets, fair value disclosure | 42 | 50
Liabilities, fair value disclosure | 0 | 0
Fair Value, Inputs, Level 3 [Member] | Mutual Funds [Member] |  |
Equity securities | 0 | 0
Fair Value, Inputs, Level 3 [Member] | Preferred Stock of Government Sponsored Entities [Member] |  |
Equity securities | 0 | 0
Fair Value, Inputs, Level 3 [Member] | Other Equity Securities [Member] |  |
Equity securities | 0 | 0
Fair Value, Inputs, Level 3 [Member] | Warrant [Member] |  |
Assets, fair value disclosure | 42 | 50
Fair Value, Inputs, Level 3 [Member] | Interest Rate Swap [Member] |  |
Assets, fair value disclosure | 0 | 0
Liabilities, fair value disclosure | 0 | 0
Fair Value, Inputs, Level 3 [Member] | Foreign Exchange Contract [Member] |  |
Assets, fair value disclosure | 0 | 0
Liabilities, fair value disclosure | 0 | 0
US Treasury Securities [Member] |  |
Securities available-for-sale | 392,842 | 240,500
US Treasury Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Securities available-for-sale | 392,842 | 240,500
US Treasury Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Securities available-for-sale | 0 | 0
US Treasury Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Securities available-for-sale | 0 | 0
US Government Corporations and Agencies Securities [Member] |  |
Securities available-for-sale | 51,001 | 63,610
US Government Corporations and Agencies Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Securities available-for-sale | 0 | 0
US Government Corporations and Agencies Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Securities available-for-sale | 51,001 | 63,610
US Government Corporations and Agencies Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Securities available-for-sale | 0 | 0
US Government-sponsored Enterprises Debt Securities [Member] |  |
Securities available-for-sale | 33,620 | 30,000
US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Securities available-for-sale | 0 | 0
US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Securities available-for-sale | 33,620 | 30,000
US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Securities available-for-sale | 0 | 0
Commercial Mortgage-Backed Securities [Member] |  |
Securities available-for-sale | 761,803 | 867,094
Commercial Mortgage-Backed Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Securities available-for-sale | 0 | 0
Commercial Mortgage-Backed Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Securities available-for-sale | 761,803 | 867,094
Commercial Mortgage-Backed Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Securities available-for-sale | 0 | 0
Collateralized Mortgage Obligations [Member] |  |
Securities available-for-sale | 27,698 | 31,061
Collateralized Mortgage Obligations [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Securities available-for-sale | 0 | 0
Collateralized Mortgage Obligations [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Securities available-for-sale | 27,698 | 31,061
Collateralized Mortgage Obligations [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Securities available-for-sale | 0 | 0
Corporate Debt Securities [Member] |  |
Securities available-for-sale | 231,872 | 241,083
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Securities available-for-sale | 0 | 0
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Securities available-for-sale | 231,872 | 241,083
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Securities available-for-sale | 0 | $ 0
Debt Security, Corporate, Non-US [Member] |  |
Securities available-for-sale | 9,962 |
Debt Security, Corporate, Non-US [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Securities available-for-sale | 0 |
Debt Security, Corporate, Non-US [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Securities available-for-sale | 9,962 |
Debt Security, Corporate, Non-US [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Securities available-for-sale | $ 0 |

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