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Note 3 - Loans Receivable and Allowance for Credit Losses on Loans - Schedule of Past Due Loans (Details) - USD ($) $ in Thousands		Sep. 30, 2024	Dec. 31, 2023
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		$ 2,494,929	$ 2,433,015
Financing Receivable, Nonaccrual	[1]	10,772	10,952
Real Estate Portfolio Segment [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		1,550,490	1,530,381
Financing Receivable, Nonaccrual	[1]	6,189	6,056
Real Estate Portfolio Segment [Member] | Commercial Real Estate [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		352,933	366,328
Financing Receivable, Nonaccrual		1,130	1,088
Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		292,366	303,054
Financing Receivable, Nonaccrual	[1]	4,737	4,699
Real Estate Portfolio Segment [Member] | Home Equity Loan [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		75,063	69,488
Financing Receivable, Nonaccrual	[1]	156	173
Real Estate Portfolio Segment [Member] | One-to-four Family Loan [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		591,666	567,742
Financing Receivable, Nonaccrual	[1]	166	96
Real Estate Portfolio Segment [Member] | Multifamily [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		238,462	223,769
Financing Receivable, Nonaccrual	[1]	0	0
Consumer Portfolio Segment [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		632,417	646,753
Financing Receivable, Nonaccrual	[1]	2,008	2,213
Consumer Portfolio Segment [Member] | Indirect Home Improvement Loan [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		552,226	569,903
Financing Receivable, Nonaccrual	[1]	1,770	1,863
Consumer Portfolio Segment [Member] | Marine Loans [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		76,845	73,310
Financing Receivable, Nonaccrual	[1]	233	342
Consumer Portfolio Segment [Member] | Other Consumer Loan [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		3,346	3,540
Financing Receivable, Nonaccrual	[1]	5	8
Commercial Business Portfolio Segment [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		312,022	255,881
Financing Receivable, Nonaccrual	[1]	2,575	2,683
Commercial Business Portfolio Segment [Member] | Commercial And Industrial [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		296,773	238,301
Financing Receivable, Nonaccrual	[1]	2,575	2,683
Commercial Business Portfolio Segment [Member] | Warehouse Lending Loan [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		15,249	17,580
Financing Receivable, Nonaccrual	[1]	0	0
Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		2,365	2,268
Financial Asset, 30 to 59 Days Past Due [Member] | Real Estate Portfolio Segment [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		173	79
Financial Asset, 30 to 59 Days Past Due [Member] | Real Estate Portfolio Segment [Member] | Commercial Real Estate [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		0	0
Financial Asset, 30 to 59 Days Past Due [Member] | Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		0	0
Financial Asset, 30 to 59 Days Past Due [Member] | Real Estate Portfolio Segment [Member] | Home Equity Loan [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		173	79
Financial Asset, 30 to 59 Days Past Due [Member] | Real Estate Portfolio Segment [Member] | One-to-four Family Loan [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		0	0
Financial Asset, 30 to 59 Days Past Due [Member] | Real Estate Portfolio Segment [Member] | Multifamily [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		0	0
Financial Asset, 30 to 59 Days Past Due [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		2,192	2,189
Financial Asset, 30 to 59 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Indirect Home Improvement Loan [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		2,074	1,759
Financial Asset, 30 to 59 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Marine Loans [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		113	373
Financial Asset, 30 to 59 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Other Consumer Loan [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		5	57
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Business Portfolio Segment [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		0	0
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Business Portfolio Segment [Member] | Commercial And Industrial [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		0	0
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Business Portfolio Segment [Member] | Warehouse Lending Loan [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		0	0
Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		2,178	1,630
Financial Asset, 60 to 89 Days Past Due [Member] | Real Estate Portfolio Segment [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		794	121
Financial Asset, 60 to 89 Days Past Due [Member] | Real Estate Portfolio Segment [Member] | Commercial Real Estate [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		0	0
Financial Asset, 60 to 89 Days Past Due [Member] | Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		0	0
Financial Asset, 60 to 89 Days Past Due [Member] | Real Estate Portfolio Segment [Member] | Home Equity Loan [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		0	25
Financial Asset, 60 to 89 Days Past Due [Member] | Real Estate Portfolio Segment [Member] | One-to-four Family Loan [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		794	96
Financial Asset, 60 to 89 Days Past Due [Member] | Real Estate Portfolio Segment [Member] | Multifamily [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		0	0
Financial Asset, 60 to 89 Days Past Due [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		1,184	1,509
Financial Asset, 60 to 89 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Indirect Home Improvement Loan [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		1,051	1,248
Financial Asset, 60 to 89 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Marine Loans [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		130	243
Financial Asset, 60 to 89 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Other Consumer Loan [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		3	18
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Business Portfolio Segment [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		200	0
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Business Portfolio Segment [Member] | Commercial And Industrial [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		200	0
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Business Portfolio Segment [Member] | Warehouse Lending Loan [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		0	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		7,455	3,570
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Real Estate Portfolio Segment [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		4,894	136
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Real Estate Portfolio Segment [Member] | Commercial Real Estate [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		0	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		4,737	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Real Estate Portfolio Segment [Member] | Home Equity Loan [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		156	136
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Real Estate Portfolio Segment [Member] | One-to-four Family Loan [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		1	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Real Estate Portfolio Segment [Member] | Multifamily [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		0	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		860	920
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Indirect Home Improvement Loan [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		718	777
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Marine Loans [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		142	137
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Other Consumer Loan [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		0	6
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial Business Portfolio Segment [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		1,701	2,514
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial Business Portfolio Segment [Member] | Commercial And Industrial [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		1,701	2,514
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial Business Portfolio Segment [Member] | Warehouse Lending Loan [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		0	0
Financial Asset, Past Due [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		11,998	7,468
Financial Asset, Past Due [Member] | Real Estate Portfolio Segment [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		5,861	336
Financial Asset, Past Due [Member] | Real Estate Portfolio Segment [Member] | Commercial Real Estate [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		0	0
Financial Asset, Past Due [Member] | Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		4,737	0
Financial Asset, Past Due [Member] | Real Estate Portfolio Segment [Member] | Home Equity Loan [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		329	240
Financial Asset, Past Due [Member] | Real Estate Portfolio Segment [Member] | One-to-four Family Loan [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		795	96
Financial Asset, Past Due [Member] | Real Estate Portfolio Segment [Member] | Multifamily [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		0	0
Financial Asset, Past Due [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		4,236	4,618
Financial Asset, Past Due [Member] | Consumer Portfolio Segment [Member] | Indirect Home Improvement Loan [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		3,843	3,784
Financial Asset, Past Due [Member] | Consumer Portfolio Segment [Member] | Marine Loans [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		385	753
Financial Asset, Past Due [Member] | Consumer Portfolio Segment [Member] | Other Consumer Loan [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		8	81
Financial Asset, Past Due [Member] | Commercial Business Portfolio Segment [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		1,901	2,514
Financial Asset, Past Due [Member] | Commercial Business Portfolio Segment [Member] | Commercial And Industrial [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		1,901	2,514
Financial Asset, Past Due [Member] | Commercial Business Portfolio Segment [Member] | Warehouse Lending Loan [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		0	0
Financial Asset, Not Past Due [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		2,482,931	2,425,547
Financial Asset, Not Past Due [Member] | Real Estate Portfolio Segment [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		1,544,629	1,530,045
Financial Asset, Not Past Due [Member] | Real Estate Portfolio Segment [Member] | Commercial Real Estate [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		352,933	366,328
Financial Asset, Not Past Due [Member] | Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		287,629	303,054
Financial Asset, Not Past Due [Member] | Real Estate Portfolio Segment [Member] | Home Equity Loan [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		74,734	69,248
Financial Asset, Not Past Due [Member] | Real Estate Portfolio Segment [Member] | One-to-four Family Loan [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		590,871	567,646
Financial Asset, Not Past Due [Member] | Real Estate Portfolio Segment [Member] | Multifamily [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		238,462	223,769
Financial Asset, Not Past Due [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		628,181	642,135
Financial Asset, Not Past Due [Member] | Consumer Portfolio Segment [Member] | Indirect Home Improvement Loan [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		548,383	566,119
Financial Asset, Not Past Due [Member] | Consumer Portfolio Segment [Member] | Marine Loans [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		76,460	72,557
Financial Asset, Not Past Due [Member] | Consumer Portfolio Segment [Member] | Other Consumer Loan [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		3,338	3,459
Financial Asset, Not Past Due [Member] | Commercial Business Portfolio Segment [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		310,121	253,367
Financial Asset, Not Past Due [Member] | Commercial Business Portfolio Segment [Member] | Commercial And Industrial [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		294,872	235,787
Financial Asset, Not Past Due [Member] | Commercial Business Portfolio Segment [Member] | Warehouse Lending Loan [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		$ 15,249	$ 17,580
[1] Includes loans less than 90 days past due as applicable.

X

- Definition

Amortized cost excluding accrued interest, before allowance for credit loss, of financing receivable. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479344/326-20-45-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-3B

Reference 3: 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

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X

- Definition

Amortized cost excluding accrued interest, of financing receivable on nonaccrual status. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 16
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-16

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