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Loans - Age Analysis of Recorded Investment in Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	$ 6,668,912	$ 6,747,873
Financial Asset, 30 to 59 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	10,575	19,523
Financial Asset, 60 to 89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	1,821	12,793
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	44,984	33,975
Financial Asset, Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	57,380	66,291
Financial Asset, Not Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	6,611,532	6,681,582
Multi-family residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	2,448,186	2,531,613
Multi-family residential | Financial Asset, 30 to 59 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	4,505	12,596
Multi-family residential | Financial Asset, 60 to 89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	0	9,255
Multi-family residential | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	14,531	11,707
Multi-family residential | Financial Asset, Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	19,036	33,558
Multi-family residential | Financial Asset, Not Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	2,429,150	2,498,055
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	1,961,833	1,974,622
Commercial | Financial Asset, 30 to 59 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	1,479	4,846
Commercial | Financial Asset, 60 to 89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	0	0
Commercial | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	22,011	6,376
Commercial | Financial Asset, Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	23,490	11,222
Commercial | Financial Asset, Not Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	1,938,343	1,963,400
One-to-four family - mixed- use property
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	485,366	513,938
One-to-four family - mixed- use property | Financial Asset, 30 to 59 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	948	870
One-to-four family - mixed- use property | Financial Asset, 60 to 89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	0	1,234
One-to-four family - mixed- use property | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	0	117
One-to-four family - mixed- use property | Financial Asset, Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	948	2,221
One-to-four family - mixed- use property | Financial Asset, Not Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	484,418	511,717
One-to-four family - residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	336,505	244,593
One-to-four family - residential | Financial Asset, 30 to 59 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	1,339	802
One-to-four family - residential | Financial Asset, 60 to 89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	113	65
One-to-four family - residential | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	750	812
One-to-four family - residential | Financial Asset, Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	2,202	1,679
One-to-four family - residential | Financial Asset, Not Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	334,303	242,914
Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	51,527	60,114
Construction | Financial Asset, 30 to 59 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	0	0
Construction | Financial Asset, 60 to 89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	0	0
Construction | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	0	0
Construction | Financial Asset, Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	0	0
Construction | Financial Asset, Not Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	51,527	60,114
Small Business Administration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	11,556	20,195
Small Business Administration | Financial Asset, 30 to 59 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	172	0
Small Business Administration | Financial Asset, 60 to 89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	0	0
Small Business Administration | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	558	2,531
Small Business Administration | Financial Asset, Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	730	2,531
Small Business Administration | Financial Asset, Not Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	10,826	17,664
Commercial business and other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	1,373,939	1,402,798
Commercial business and other | Financial Asset, 30 to 59 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	2,132	409
Commercial business and other | Financial Asset, 60 to 89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	1,708	2,239
Commercial business and other | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	7,134	12,432
Commercial business and other | Financial Asset, Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	10,974	15,080
Commercial business and other | Financial Asset, Not Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	$ 1,362,965	$ 1,387,718

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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 310
-SubTopic 20
-Name Accounting Standards Codification
-Section 40
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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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