Note 7 - Loans and the Allowance for Credit Losses - Composition of Loans Held-for-sale (Details) - USD ($) $ in Thousands	Sep. 30, 2026	Dec. 31, 2025
Total loans held-for-sale	$ 678,880	$ 391
Commercial Real Estate Portfolio Segment [Member]
Total loans held-for-sale	678,880	0
Residential Portfolio Segment [Member]
Total loans held-for-sale	$ 0	$ 391

Amount, before valuation allowance, of financing receivable classified as held-for-sale.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481990/310-10-45-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 948
-SubTopic 310
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477011/948-310-45-1

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant