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Loans and Allowance for Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2024	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Allowance for credit losses - loans	$ 40,152				$ 40,161				$ 40,152	$ 40,161	$ 40,442	$ 37,135
Provision for credit losses	$ 6,440	$ 1,727	$ 809	$ 592	$ 998	$ 596	$ 1,416	$ 7,508
Servicing Mortgage Loans [Member]
Servicing Asset Loans Serviced Amount									$ 53,300
Multi-family residential, commercial real estate and commercial business and other loans
Percentage of financing receivable non-performing loans									75.00%
Percentage of financing receivable on total loans									125.00%
Multi-family residential, commercial real estate and commercial business and other loans | Gross Loans [Member] | Credit Concentration Risk [Member]
Concentration Risk, Percentage									87.90%	88.30%

X

- Definition

The percentage of allowance for credit loss on total non performing loans.

+ References

No definition available.

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- Definition

The percentage of allowance for credit loss on total financial receivables.

+ References

No definition available.

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- Definition

Aggregate amount of loans serviced for others as part of servicing assets that are subsequently measured at fair value and servicing assets that are subsequently measured using the amortization method.

+ References

No definition available.

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 42
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-42

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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-Section 50
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482907/825-10-50-21

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
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-Topic 275
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-URI https://asc.fasb.org/1943274/2147482861/275-10-50-18

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
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-Topic 275
-SubTopic 10
-Section 50
-Paragraph 20
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482861/275-10-50-20

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- Definition

Amount excluding accrued interest, of allowance for credit loss on 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

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- Definition

Amount of credit loss expense (reversal of expense) for financing receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
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-Name Accounting Standards Codification
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-Paragraph 1
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478524/942-220-S99-1

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