Loans Receivable - Troubled Debt Restructured Loans by Class (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Financing Receivable, Troubled Debt Restructuring [Line Items]
Accrual loans	$ 3,463	$ 3,661
Nonaccrual loans	81	84
Total TDR loans	3,544	3,745
Commercial business loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Accrual loans	263	272
Nonaccrual loans	0	0
Total TDR loans	263	272
Commercial real estate \| Residential segment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Accrual loans	643	663
Nonaccrual loans	0	0
Total TDR loans	643	663
Home equity \| Consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Accrual loans	160	258
Nonaccrual loans	0	0
Total TDR loans	160	258
One- to four-family \| Real estate loans \| Residential segment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Accrual loans	2,290	2,358
Nonaccrual loans	81	84
Total TDR loans	2,371	2,442
Multi-family \| Real estate loans \| Residential segment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Accrual loans	107	110
Nonaccrual loans	0	0
Total TDR loans	$ 107	$ 110

Financing Receivable, Modifications, Recorded Investment, Accrual

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Financing Receivable, Modifications, Recorded Investment, Nonaccrual Status

+ References

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Amount of financing receivable modified as troubled debt restructuring.

+ 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 http://asc.fasb.org/extlink&oid=118936363&loc=SL6953676-111524

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-Topic 310
-SubTopic 40
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=118939409&loc=d3e18845-111554

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