Fair Value, Assets Measured on Recurring Basis, Valuation Techniques (Details) $ in Thousands		3 Months Ended	12 Months Ended
		Jun. 30, 2021 USD ($)	Mar. 31, 2021 USD ($)	Jun. 30, 2020 USD ($)	Mar. 31, 2020 USD ($)
Fair Value, Inputs, Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage servicing rights		$ 151	$ 147
Fair Value, Measurements, Recurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage servicing rights		151	147
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage servicing rights		151	147
Fair Value, Measurements, Recurring | Other Assets | Fair Value, Inputs, Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value		$ 151	$ 147	$ 152	$ 145
Fair Value Measurements, Valuation Processes, Description		Discounted Cash Flow	Discounted Cash Flow
Servicing Asset, Measurement Input		0.1031	0.1333
Measurement Input, Constant Prepayment Rate | Fair Value, Measurements, Recurring | Other Assets | Fair Value, Inputs, Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value Measurements, Valuation Processes, Description	[1]	Weighted Average Constant Prepayment Rate (1)	Weighted Average Constant Prepayment Rate (1)
Measurement Input, Discount Rate | Fair Value, Measurements, Recurring | Other Assets | Fair Value, Inputs, Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value Measurements, Valuation Processes, Description	[1]	Option Adjusted Spread ("OAS") applied to Treasury curve	Option Adjusted Spread ("OAS" applied to Treasury curve

[1] (1) Represents annualized loan repayment rate assumptions