Note 4 - Investment Securities - Summary of Continuous Unrealized Loss Position for Securities Classified as AFS (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Less than 12 Months, Fair Value	$ 108,537	$ 30,685
Less than 12 Months, Unrealized Losses	(1,938)	(217)
12 Months or More, Fair Value	248,444	265,528
12 Months or More, Unrealized Losses	(46,683)	(46,197)
Fair Value	356,981	296,213
Unrealized Losses	(48,621)	(46,414)
US Government Corporations and Agencies Securities [Member]
Less than 12 Months, Fair Value	22,023	5,669
Less than 12 Months, Unrealized Losses	(345)	(18)
12 Months or More, Fair Value	3,940	3,017
12 Months or More, Unrealized Losses	(194)	(195)
Fair Value	25,963	8,686
Unrealized Losses	(539)	(213)
US States and Political Subdivisions Debt Securities [Member]
Less than 12 Months, Fair Value	4,497	0
Less than 12 Months, Unrealized Losses	(96)	0
12 Months or More, Fair Value	11,599	14,330
12 Months or More, Unrealized Losses	(1,494)	(1,497)
Fair Value	16,096	14,330
Unrealized Losses	(1,590)	(1,497)
Corporate Debt Securities [Member]
Less than 12 Months, Fair Value	2,840	3,169
Less than 12 Months, Unrealized Losses	(107)	(32)
12 Months or More, Fair Value	12,512	14,196
12 Months or More, Unrealized Losses	(1,244)	(1,303)
Fair Value	15,352	17,365
Unrealized Losses	(1,351)	(1,335)
Residential Mortgage-Backed Securities [Member]
Less than 12 Months, Fair Value	56,494	11,982
Less than 12 Months, Unrealized Losses	(1,135)	(97)
12 Months or More, Fair Value	180,462	192,175
12 Months or More, Unrealized Losses	(36,599)	(36,089)
Fair Value	236,956	204,157
Unrealized Losses	(37,734)	(36,186)
Commercial Mortgage-Backed Securities [Member]
Less than 12 Months, Fair Value	22,683	9,865
Less than 12 Months, Unrealized Losses	(255)	(70)
12 Months or More, Fair Value	39,931	41,810
12 Months or More, Unrealized Losses	(7,152)	(7,113)
Fair Value	62,614	51,675
Unrealized Losses	$ (7,407)	$ (7,183)

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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