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Note 6 - Loans and the Allowance for Credit Losses - Collateral Dependent Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Gross loans	$ 8,206,343	$ 8,280,482
Real Estate [Member]
Gross loans	35,618	43,054
Other Collateral Pledged [Member]
Gross loans	9,118	9,222
Collateral Pledged [Member]
Gross loans	44,736	52,276
Commercial Portfolio Segment [Member]
Gross loans	1,492,920	1,532,730
Commercial Portfolio Segment [Member] | Real Estate [Member]
Gross loans	2,264	2,308
Commercial Portfolio Segment [Member] | Other Collateral Pledged [Member]
Gross loans	9,118	9,222
Commercial Portfolio Segment [Member] | Collateral Pledged [Member]
Gross loans	11,382	11,530
Commercial Real Estate Portfolio Segment [Member]
Gross loans	5,837,671	5,880,679
Commercial Real Estate Portfolio Segment [Member] | Real Estate [Member]
Gross loans	29,109	36,486
Commercial Real Estate Portfolio Segment [Member] | Other Collateral Pledged [Member]
Gross loans	0	0
Commercial Real Estate Portfolio Segment [Member] | Collateral Pledged [Member]
Gross loans	29,109	36,486
Commercial Construction Portfolio Segment [Member]
Gross loans	617,593	616,246
Commercial Construction Portfolio Segment [Member] | Real Estate [Member]
Gross loans	2,204	2,204
Commercial Construction Portfolio Segment [Member] | Other Collateral Pledged [Member]
Gross loans	0	0
Commercial Construction Portfolio Segment [Member] | Collateral Pledged [Member]
Gross loans	2,204	2,204
Residential Portfolio Segment [Member]
Gross loans	256,555	249,691
Residential Portfolio Segment [Member] | Real Estate [Member]
Gross loans	2,041	2,056
Residential Portfolio Segment [Member] | Other Collateral Pledged [Member]
Gross loans	0	0
Residential Portfolio Segment [Member] | Collateral Pledged [Member]
Gross loans	$ 2,041	$ 2,056

X

- Definition

Amortized cost, before allowance for credit loss, fee, and loan in process, of financing receivable. Excludes financing receivable covered under loss sharing agreement and net investment in lease.

+ References

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 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-5

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(7))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1

+ Details

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