Loans Receivable and Allowance for Credit Losses - Interest Income on Impaired Loans (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Recorded Investment
Average Recorded Investment	$ 23,536	$ 34,311	$ 38,519
Interest Income Recognized	1,091	1,305	1,712
Real estate loans \| One-to-four family
Recorded Investment
Average Recorded Investment	4,385	5,738	7,946
Interest Income Recognized	203	285	305
Real estate loans \| Multifamily
Recorded Investment
Average Recorded Investment	598	8,420	0
Interest Income Recognized	28	371	0
Real estate loans \| Commercial real estate
Recorded Investment
Average Recorded Investment	16,479	16,913	23,701
Interest Income Recognized	733	467	1,091
Commercial business loans
Recorded Investment
Average Recorded Investment	1,289	2,121	4,963
Interest Income Recognized	88	139	216
Consumer loans \| Home equity loans and advances
Recorded Investment
Average Recorded Investment	785	1,119	1,909
Interest Income Recognized	$ 39	$ 43	$ 100

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No definition available.

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- Definition

Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)(1)
-URI https://asc.fasb.org/extlink&oid=123577603&loc=d3e5212-111524

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 17
-URI https://asc.fasb.org/extlink&oid=123577603&loc=d3e5258-111524

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- Definition

Amount of interest income recognized that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired.

+ References

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