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Borrowings - Summary of Borrowings (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Mar. 31, 2025
Line of Credit Facility [Line Items] |  |  |  |  |
Outstanding advances |  |  |  |  | $ 0
Total borrowing capacity | $ 32,000 |  | $ 32,000 |  | 40,500
Private Banker's Bank |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |
Outstanding advances at any month-end during the period |  | $ 459 |  | $ 459 |
Federal Home Loan Bank Of Topeka and Private Banker's Bank |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |
Average balance outstanding | 3,091 | 5,208 | 1,621 | 3,463 |
Total maximum amount outstanding at any month-end during the period | $ 8,500 | $ 8,459 | $ 8,500 | $ 8,459 |
Average interest rate during the period | 4.53% | 5.68% | 4.57% | 5.72% |
Additional borrowing capacity | $ 37,028 |  | $ 37,028 |  | 45,534
Total borrowing capacity | 45,528 |  | 45,528 |  | $ 45,534
FHLB of Topeka |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |
Outstanding advances at any month-end during the period | 8,500 | $ 8,000 | 8,500 | $ 8,000 |
Outstanding advances | $ 8,500 |  | $ 8,500 |  |

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- Definition Amount of borrowings as of the balance sheet date from the Federal Home Loan Bank, which are primarily used to cover shortages in the required reserve balance and liquidity shortages. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 470 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478878/942-470-45-1 + Details
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- Definition The calculated weighted average interest rate for Federal Home Loan Bank advances for the period ended as of the Balance Sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(13)(3)(a)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 + Details
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