Fair Value of Financial Instruments - Valuation techniques and inputs used (Details) $ in Thousands	12 Months Ended
	Jun. 30, 2022 USD ($)
Private issue CMO | Market comparable pricing | Comparability adjustment
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets Fair Value Measurement Input	0.96%
Fair Value, Inputs, Level 3 | Private issue CMO
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	$ 113
Fair Value, Inputs, Level 3 | Private issue CMO | Market comparable pricing | Comparability adjustment
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impact to valuation from an increase in inputs on assets	Increase
Fair Value, Inputs, Level 3 | Loans Held For Investment, at Fair Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	$ 1,396
Fair Value, Inputs, Level 3 | Loans Held For Investment, at Fair Value [Member] | Relative value analysis | Broker quotes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impact to valuation from an increase in inputs on assets	Increase
Fair Value, Inputs, Level 3 | Loans Held For Investment, at Fair Value [Member] | Relative value analysis | Credit risk factors
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impact to valuation from an increase in inputs on assets	Decrease
Fair Value, Inputs, Level 3 | Loans Held For Investment, at Fair Value [Member] | Minimum | Relative value analysis | Broker quotes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets Fair Value Measurement Input	91.10%
Fair Value, Inputs, Level 3 | Loans Held For Investment, at Fair Value [Member] | Minimum | Relative value analysis | Credit risk factors
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets Fair Value Measurement Input	1.20%
Fair Value, Inputs, Level 3 | Loans Held For Investment, at Fair Value [Member] | Maximum | Relative value analysis | Broker quotes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets Fair Value Measurement Input	98.00%
Fair Value, Inputs, Level 3 | Loans Held For Investment, at Fair Value [Member] | Maximum | Relative value analysis | Credit risk factors
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets Fair Value Measurement Input	100.00%
Fair Value, Inputs, Level 3 | Loans Held For Investment, at Fair Value [Member] | Weighted Average | Relative value analysis | Broker quotes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets Fair Value Measurement Input	93.40%
Fair Value, Inputs, Level 3 | Loans Held For Investment, at Fair Value [Member] | Weighted Average | Relative value analysis | Credit risk factors
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets Fair Value Measurement Input	4.60%
Fair Value, Inputs, Level 3 | Non-performing loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	$ 722
Fair Value, Inputs, Level 3 | Non-performing loans | Relative value analysis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	$ 186
Fair Value, Inputs, Level 3 | Non-performing loans | Relative value analysis | Credit risk factors
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impact to valuation from an increase in inputs on assets	Decrease
Fair Value, Inputs, Level 3 | Non-performing loans | Discounted cash flow | Default rates.
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impact to valuation from an increase in inputs on assets	Decrease
Fair Value, Inputs, Level 3 | Non-performing loans | Minimum | Relative value analysis | Credit risk factors
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets Fair Value Measurement Input	20.00%
Fair Value, Inputs, Level 3 | Non-performing loans | Minimum | Discounted cash flow | Discount rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets Fair Value Measurement Input	5.00%
Fair Value, Inputs, Level 3 | Mortgage servicing assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	$ 168
Fair Value, Inputs, Level 3 | Mortgage servicing assets | Prepayment speed (CPR)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impact to valuation from an increase in inputs on assets	Decrease
Fair Value, Inputs, Level 3 | Mortgage servicing assets | Discount rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impact to valuation from an increase in inputs on assets	Decrease
Fair Value, Inputs, Level 3 | Mortgage servicing assets | Minimum | Discounted cash flow | Prepayment speed (CPR)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets Fair Value Measurement Input	4.80%
Fair Value, Inputs, Level 3 | Mortgage servicing assets | Minimum | Discounted cash flow | Discount rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets Fair Value Measurement Input	9.00%
Fair Value, Inputs, Level 3 | Mortgage servicing assets | Maximum | Discounted cash flow | Prepayment speed (CPR)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets Fair Value Measurement Input	60.00%
Fair Value, Inputs, Level 3 | Mortgage servicing assets | Maximum | Discounted cash flow | Discount rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets Fair Value Measurement Input	10.50%
Fair Value, Inputs, Level 3 | Mortgage servicing assets | Weighted Average | Discounted cash flow | Prepayment speed (CPR)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets Fair Value Measurement Input	10.90%
Fair Value, Inputs, Level 3 | Mortgage servicing assets | Weighted Average | Discounted cash flow | Discount rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets Fair Value Measurement Input	9.00%
Fair Value, Inputs, Level 3 | Interest-Only Strips
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	$ 7
Fair Value, Inputs, Level 3 | Interest-Only Strips | Prepayment speed (CPR)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impact to valuation from an increase in inputs on assets	Decrease
Fair Value, Inputs, Level 3 | Interest-Only Strips | Discount rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impact to valuation from an increase in inputs on assets	Decrease
Fair Value, Inputs, Level 3 | Interest-Only Strips | Discounted cash flow | Discount rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets Fair Value Measurement Input	9.00%
Fair Value, Inputs, Level 3 | Interest-Only Strips | Minimum | Discounted cash flow | Prepayment speed (CPR)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets Fair Value Measurement Input	9.50%
Fair Value, Inputs, Level 3 | Interest-Only Strips | Maximum | Discounted cash flow | Prepayment speed (CPR)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets Fair Value Measurement Input	32.00%
Fair Value, Inputs, Level 3 | Interest-Only Strips | Weighted Average | Discounted cash flow | Prepayment speed (CPR)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets Fair Value Measurement Input	30.60%