Loans Receivable and Allowance for Credit Losses - Troubled Debt Restructuring (Details) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2022 USD ($) loan	Jun. 30, 2021 USD ($) loan	Jun. 30, 2022 USD ($) loan	Jun. 30, 2021 USD ($) loan
Financing Receivable, Troubled Debt Restructuring [Line Items]
No. of Loans \| loan	0	2	1	2
Pre-modification Recorded Investment	$ 0	$ 413	$ 119	$ 413
Post-modification Recorded Investment	$ 0	$ 533	$ 119	$ 533
Real estate loans \| One-to-four family
Financing Receivable, Troubled Debt Restructuring [Line Items]
No. of Loans \| loan	0	1	0	1
Pre-modification Recorded Investment	$ 0	$ 221	$ 0	$ 221
Post-modification Recorded Investment	$ 0	$ 322	$ 0	$ 322
Real estate loans \| Commercial real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
No. of Loans \| loan	0	1	0	1
Pre-modification Recorded Investment	$ 0	$ 192	$ 0	$ 192
Post-modification Recorded Investment	$ 0	$ 211	$ 0	$ 211
Consumer loans \| Home equity loans and advances
Financing Receivable, Troubled Debt Restructuring [Line Items]
No. of Loans \| loan			1	0
Pre-modification Recorded Investment			$ 119	$ 0
Post-modification Recorded Investment			$ 119	$ 0

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No definition available.

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Number of financing receivables that have been modified by troubled debt restructurings.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953676-111524

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Amount, after troubled debt restructuring, of modified financing receivable.

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- Definition

Amount, before troubled debt restructuring, of financing receivable to be modified.

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