Note 17 - 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, 2023	Dec. 31, 2022
Securities available-for-sale	$ 1,604,570	$ 1,473,348
Equity securities	40,406	22,158
Assets, fair value disclosure	1,699,623	1,540,447
Liabilities, fair value disclosure	45,937	52,806
Mutual Funds [Member]
Equity securities	5,585	5,509
Preferred Stock of Government Sponsored Entities [Member]
Equity securities	1,821	1,289
Other Equity Securities [Member]
Equity securities	33,000	15,360
Warrant [Member]
Assets, fair value disclosure	0	50
Interest Rate Swap [Member]
Assets, fair value disclosure	54,268	44,443
Liabilities, fair value disclosure	45,762	51,864
Foreign Exchange Contract [Member]
Assets, fair value disclosure	379	448
Liabilities, fair value disclosure	175	942
Fair Value, Inputs, Level 1 [Member]
Securities available-for-sale	495,300	240,500
Equity securities	40,406	22,158
Assets, fair value disclosure	535,706	262,658
Liabilities, fair value disclosure	0	0
Fair Value, Inputs, Level 1 [Member] | Mutual Funds [Member]
Equity securities	5,585	5,509
Fair Value, Inputs, Level 1 [Member] | Preferred Stock of Government Sponsored Entities [Member]
Equity securities	1,821	1,289
Fair Value, Inputs, Level 1 [Member] | Other Equity Securities [Member]
Equity securities	33,000	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
Liabilities, fair value disclosure	0	0
Fair Value, Inputs, Level 2 [Member]
Securities available-for-sale	1,109,270	1,232,848
Equity securities	0	0
Assets, fair value disclosure	1,163,917	1,277,739
Liabilities, fair value disclosure	45,937	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	54,268	44,443
Liabilities, fair value disclosure	45,762	51,864
Fair Value, Inputs, Level 2 [Member] | Foreign Exchange Contract [Member]
Assets, fair value disclosure	379	448
Liabilities, fair value disclosure	175	942
Fair Value, Inputs, Level 3 [Member]
Securities available-for-sale	0	0
Equity securities	0	0
Assets, fair value disclosure	0	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	0	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	495,300	240,500
US Treasury Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Securities available-for-sale	495,300	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	48,169	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	48,169	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	0	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	0	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	786,723	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	786,723	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	28,044	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	28,044	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	246,334	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	246,334	241,083
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Securities available-for-sale	$ 0	$ 0