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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 | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Securities available-for-sale | $ 908,844 | $ 1,036,550
Equity securities | 20,993 | 23,744
Assets, fair value disclosure | 936,359 | 1,068,382
Liabilities, fair value disclosure | 14,666 | 12,486
Fair Value, Inputs, Level 1 [Member] |  |
Securities available-for-sale | 40,720 | 80,948
Equity securities | 20,993 | 23,744
Assets, fair value disclosure | 61,713 | 104,692
Liabilities, fair value disclosure | 0 | 0
Fair Value, Inputs, Level 2 [Member] |  |
Securities available-for-sale | 868,124 | 955,602
Equity securities | 0 | 0
Assets, fair value disclosure | 874,630 | 963,669
Liabilities, fair value disclosure | 14,666 | 12,486
Fair Value, Inputs, Level 3 [Member] |  |
Securities available-for-sale | 0 | 0
Equity securities | 0 | 0
Assets, fair value disclosure | 16 | 21
Liabilities, fair value disclosure | 0 | 0
US Treasury Securities [Member] |  |
Securities available-for-sale | 40,720 | 80,948
US Treasury Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Securities available-for-sale | 40,720 | 80,948
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 | 96,051 | 99,838
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 | 96,051 | 99,838
US Government Corporations and Agencies Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Securities available-for-sale | 0 | 0
Commercial Mortgage Backed Securities [Member] |  |
Securities available-for-sale | 668,424 | 727,068
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 | 668,424 | 727,068
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 | 10,127 | 10,324
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 | 10,127 | 10,324
Collateralized Mortgage Obligations [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Securities available-for-sale | 0 | 0
Corporate Debt Securities [Member] |  |
Securities available-for-sale | 93,522 | 118,372
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 | 93,522 | 118,372
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Securities available-for-sale | 0 | 0
Mutual Funds [Member] |  |
Equity securities | 6,301 | 6,413
Mutual Funds [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Equity securities | 6,301 | 6,413
Mutual Funds [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Equity securities | 0 | 0
Mutual Funds [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Equity securities | 0 | 0
Preferred Stock of Government Sponsored Entities [Member] |  |
Equity securities | 3,328 | 5,485
Preferred Stock of Government Sponsored Entities [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Equity securities | 3,328 | 5,485
Preferred Stock of Government Sponsored Entities [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Equity securities | 0 | 0
Preferred Stock of Government Sponsored Entities [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Equity securities | 0 | 0
Other Equity Securities [Member] |  |
Equity securities | 11,364 | 11,846
Other Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Equity securities | 11,364 | 11,846
Other Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Equity securities | 0 | 0
Other Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Equity securities | 0 | 0
Warrant [Member] |  |
Assets, fair value disclosure | 16 | 21
Warrant [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Assets, fair value disclosure | 0 | 0
Warrant [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Assets, fair value disclosure | 0 | 0
Warrant [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Assets, fair value disclosure | 16 | 21
Interest Rate Swap [Member] |  |
Assets, fair value disclosure | 3,615 | 3,409
Liabilities, fair value disclosure | 12,116 | 10,286
Interest Rate Swap [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Assets, fair value disclosure | 0 | 0
Liabilities, fair value disclosure | 0 | 0
Interest Rate Swap [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Assets, fair value disclosure | 3,615 | 3,409
Liabilities, fair value disclosure | 12,116 | 10,286
Interest Rate Swap [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Assets, fair value disclosure | 0 | 0
Liabilities, fair value disclosure | 0 | 0
Foreign Exchange Contract [Member] |  |
Assets, fair value disclosure | 2,891 | 4,658
Liabilities, fair value disclosure | 2,550 | 2,200
Foreign Exchange Contract [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Assets, fair value disclosure | 0 | 0
Liabilities, fair value disclosure | 0 | 0
Foreign Exchange Contract [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Assets, fair value disclosure | 2,891 | 4,658
Liabilities, fair value disclosure | 2,550 | 2,200
Foreign Exchange Contract [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Assets, fair value disclosure | 0 | 0
Liabilities, fair value disclosure | $ 0 | $ 0

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