Fair Value Measurements-Assets Measured on Recurring Basis, Unobservable Input Reconciliation (Details) - USD ($)		12 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
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		$ 145,000	180,000
Fair Value, Measurement with Unobservable Inputs, Recurring Basis, Asset, Gain (Loss) Included in Earnings	[1]	2,000	(35,000)
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		147,000	145,000
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		$ 2,000	$ (33,000)

[1] (1) Includes net servicing cash flows and the passage of time.