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Fair Value of Financial Instruments - Valuation techniques and inputs used (Details) - Level 3
$ in Thousands
3 Months Ended
Sep. 30, 2025
USD ($)
Private issue CMO  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Assets, Fair Value Disclosure $ 75
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
Private issue CMO | Minimum | Market comparable pricing | Comparability adjustment  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Assets Fair Value Measurement Input (1.60%)
Private issue CMO | Maximum | Market comparable pricing | Comparability adjustment  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Assets Fair Value Measurement Input 0.20%
Private issue CMO | Weighted Average | Market comparable pricing | Comparability adjustment  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Assets Fair Value Measurement Input (0.20%)
Loans held for Investment, at fair value  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Assets, Fair Value Disclosure $ 1,010
Loans held for Investment, at fair value | 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
Loans held for Investment, at fair value | Relative value analysis | Credit risk factor  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Impact to valuation from an increase in inputs on assets Decrease
Loans held for Investment, at fair value | Minimum | Relative value analysis | Broker quotes  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Assets Fair Value Measurement Input 87.00%
Loans held for Investment, at fair value | Minimum | Relative value analysis | Credit risk factor  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Assets Fair Value Measurement Input 0.90%
Loans held for Investment, at fair value | Maximum | Relative value analysis | Broker quotes  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Assets Fair Value Measurement Input 90.30%
Loans held for Investment, at fair value | Maximum | Relative value analysis | Credit risk factor  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Assets Fair Value Measurement Input 1.10%
Loans held for Investment, at fair value | 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 (89.10%)
Loans held for Investment, at fair value | Weighted Average | Relative value analysis | Credit risk factor  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Assets Fair Value Measurement Input (1.00%)
MSAs  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Assets, Fair Value Disclosure $ 129
MSAs | Discounted cash flow | Prepayment rate (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
MSAs | Discounted cash flow | 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
MSAs | Minimum | Discounted cash flow | Prepayment rate (CPR)  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Assets Fair Value Measurement Input 6.00%
MSAs | 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%
MSAs | Maximum | Discounted cash flow | Prepayment rate (CPR)  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Assets Fair Value Measurement Input 60.00%
MSAs | 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%
MSAs | Weighted Average | Discounted cash flow | Prepayment rate (CPR)  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Assets Fair Value Measurement Input (13.40%)
MSAs | 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%)
Interest-only strips  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Assets, Fair Value Disclosure $ 5
Interest-only strips | Discounted cash flow | Prepayment rate (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
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%
Impact to valuation from an increase in inputs on assets Decrease
Interest-only strips | Minimum | Discounted cash flow | Prepayment rate (CPR)  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Assets Fair Value Measurement Input 10.80%
Interest-only strips | Maximum | Discounted cash flow | Prepayment rate (CPR)  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Assets Fair Value Measurement Input 21.60%
Interest-only strips | Weighted Average | Discounted cash flow | Prepayment rate (CPR)  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Assets Fair Value Measurement Input (20.80%)