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Loans Receivable and Allowance for Credit Losses - Loans receivable (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022
Loans Receivable and Allowance for Credit Losses
Loans Receivable, Net of Unearned Income	$ 368,813		$ 367,050
Allowance for Credit Losses	(1,699)	$ (2,699)	(2,802)	$ (3,253)	$ (3,253)	$ (3,253)
Net Deferred Loan Costs	793		790
Loans Receivable, Net	367,907		365,038
One-to-Four Family Mortgages
Loans Receivable and Allowance for Credit Losses
Loans Receivable, Net of Unearned Income	334,244		337,056
Allowance for Credit Losses	(1,273)	(2,454)	(2,554)	(2,738)	(2,738)	(2,738)
Home Equity Loans / Lines of Credit
Loans Receivable and Allowance for Credit Losses
Loans Receivable, Net of Unearned Income	8,203		8,550
Allowance for Credit Losses	(57)	(54)	(57)	(60)	(60)	(60)
Construction Loans
Loans Receivable and Allowance for Credit Losses
Loans Receivable, Net of Unearned Income	10,268		8,128
Allowance for Credit Losses	(7)	(32)	(32)	(73)	(73)	(73)
Consumer Loans
Loans Receivable and Allowance for Credit Losses
Loans Receivable, Net of Unearned Income	1,053		913
Allowance for Credit Losses		(9)	(9)
Commercial loans
Loans Receivable and Allowance for Credit Losses
Loans Receivable, Net of Unearned Income	15,045		12,403
Allowance for Credit Losses	$ (145)	$ (126)	$ (126)	$ (2)	$ (2)	$ (2)

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 310
-SubTopic 20
-Name Accounting Standards Codification
-Section 40
-Paragraph 7
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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
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-Name Accounting Standards Codification
-Section 45
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Amortized cost excluding accrued interest, after allowance for credit loss, of financing receivable. Excludes net investment in lease.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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