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Note 2 - INVESTMENT SECURITIES - Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Securities HTM:
Securities HTM, Amortized Cost, Due in one year or less	$ 484
Securities HTM, Fair Value, Due in one year or less	483
Securities HTM, Amortized Cost, Due after one year through five years	27,449
Securities HTM, Fair Value, Due after one year through five years	25,855
Securities HTM, Amortized Cost, Due after five years	926,445
Securities HTM, Fair Value, Due after five years	828,706
Securities HTM, Amortized Cost	954,378	$ 836,060
Securities HTM, Fair Value	855,044	800,583
Securities AFS:
Securities AFS, Amortized Cost, Due in one year or less	380
Securities AFS, Fair Value, Due in one year or less	378
Securities AFS, Amortized Cost, Due after one year through five years	19,710
Securities AFS, Fair Value, Due after one year through five years	19,153
Securities AFS, Amortized Cost, Due after five years	234,500
Securities AFS, Fair Value, Due after five years	189,792
Securities AFS, Amortized Cost, Maturity Total	254,590
Securities AFS, Fair Value, Maturity Total	209,323
Securities AFS, Amortized Cost	320,212	331,337
Securities AFS, Fair Value	271,349	281,109
Callable Securities
Securities HTM:
Securities HTM, Amortized Cost, Callable of call options	279,243
Securities HTM, Fair Value, Callable of call options	276,922
Securities AFS:
Securities AFS, Amortized Cost	237,403
Securities AFS, Fair Value	194,003
Residential mortgage-backed and related securities
Securities AFS:
Securities AFS, Amortized Cost	60,800	55,641
Securities AFS, Fair Value	57,108	50,042
Securities AFS, Amortized Cost, Without Single Maturity	60,800
Securities AFS, Fair Value, Without Single Maturity	57,108
Asset-backed securities
Securities AFS:
Securities AFS, Amortized Cost	4,822	9,053
Securities AFS, Fair Value	4,918	9,224
Securities AFS, Amortized Cost, Without Single Maturity	4,822
Securities AFS, Fair Value, Without Single Maturity	4,918
Municipal securities
Securities HTM:
Securities HTM, Amortized Cost	924,179	806,992
Securities HTM, Fair Value	821,271	766,866
Securities AFS:
Securities AFS, Amortized Cost	203,826	204,664
Securities AFS, Fair Value	161,490	164,575
Municipal securities | Callable Securities
Securities HTM:
Securities HTM, Amortized Cost, Callable of call options	250,094
Securities HTM, Fair Value, Callable of call options	32,724
Securities AFS:
Securities AFS, Amortized Cost, Without Single Maturity	203,682
Securities AFS, Fair Value, Without Single Maturity	161,355
Corporate securities
Securities HTM:
Securities HTM, Amortized Cost	29,149	28,018
Securities HTM, Fair Value	32,724	32,675
Securities AFS:
Securities AFS, Amortized Cost	34,688	38,866
Securities AFS, Fair Value	33,625	$ 36,677
Corporate securities | Callable Securities
Securities HTM:
Securities HTM, Amortized Cost, Callable of call options	29,149
Securities HTM, Fair Value, Callable of call options	244,198
Securities AFS:
Securities AFS, Amortized Cost, Without Single Maturity	33,721
Securities AFS, Fair Value, Without Single Maturity	$ 32,648

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