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Fair Value Measurements-Assets Measured on Recurring Basis, Unobservable Input Reconciliation (Details) - USD ($)
 12 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Fair Value, Measurement with Unobservable Inputs, Recurring Basis, Asset, Transfers, Net $ 0  
Fair Value, Measurements, Recurring | Other Assets | Fair Value, Inputs, Level 3    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value 152,000 $ 162,000
Fair Value, Measurement with Unobservable Inputs, Recurring Basis, Asset, Gain (Loss) Included in Earnings [1] (12,000) (10,000)
Fair Value, Measurement with Unobservable Inputs, Recurring Basis, Asset, Issuances, (Settlements) 0 0
Fair Value, Measurement with Unobservable Inputs, Recurring Basis, Asset, Transfers, Net 0 0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value 140,000 152,000
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) $ (12,000) $ (9,000)
[1]
(1) Includes net servicing cash flows and the passage of time.