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Loans Receivable And Allowance For Loan Losses - Amortized Cost of Collateral Dependent Loans (Details) - USD ($) $ in Thousands | Mar. 31, 2024 | Mar. 31, 2023
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Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Recorded Investment | $ 4,518 | $ 4,009
Related ACL | 123 | 123
Collateral Pledged |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Recorded Investment | 3,605 |
Related ACL | 361 |
One-to four-family |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Recorded Investment | 378 | 368
Related ACL | 0 | 0
One-to four-family | Collateral Pledged |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Recorded Investment | 380 |
Related ACL | 0 |
Commercial real estate |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Recorded Investment | 3,006 | 2,973
Related ACL | 0 | 0
Commercial real estate | Collateral Pledged |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Recorded Investment | 1,149 |
Related ACL | 28 |
Construction-custom & owner/builder | Collateral Pledged |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Recorded Investment | 152 |
Related ACL | 0 |
Home equity |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Recorded Investment | 381 | 382
Related ACL | 0 | 0
Home equity | Collateral Pledged |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Recorded Investment | 165 |
Related ACL | 0 |
Commercial business |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Recorded Investment | 293 | 286
Related ACL | 123 | $ 123
Commercial business | Collateral Pledged |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Recorded Investment | 1,759 |
Related ACL | $ 333 |

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-13 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph c -Publisher SEC + Details
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