FAIR VALUE - QUANTITATIVE INFORMATION ABOUT LEVEL 3 FAIR VALUE MEASURMENTS (RECURRING) (Details) $ in Thousands	Mar. 31, 2023 USD ($) year	Jun. 30, 2022 USD ($) year
Fair Value, Option, Quantitative Disclosures [Line Items]
Securities—available-for-sale	$ 279,612	$ 262,518
Securities – Available-for-Sale: Non-Agency RMBS
Fair Value, Option, Quantitative Disclosures [Line Items]
Securities—available-for-sale	206,300	186,814
Level 3
Fair Value, Option, Quantitative Disclosures [Line Items]
Securities—available-for-sale	206,300	186,814
Mortgage servicing rights	25,396	25,213
Recurring
Fair Value, Option, Quantitative Disclosures [Line Items]
Securities—available-for-sale	279,612	262,518
Mortgage servicing rights	25,396	25,213
Recurring | Securities – Available-for-Sale: Non-Agency RMBS
Fair Value, Option, Quantitative Disclosures [Line Items]
Securities—available-for-sale	206,300	186,814
Recurring | Level 3
Fair Value, Option, Quantitative Disclosures [Line Items]
Securities—available-for-sale	206,300	186,814
Mortgage servicing rights	25,396	25,213
Recurring | Level 3 | Securities – Available-for-Sale: Non-Agency RMBS
Fair Value, Option, Quantitative Disclosures [Line Items]
Securities—available-for-sale	$ 206,300	$ 186,814
Recurring | Level 3 | Securities – Available-for-Sale: Non-Agency RMBS | Projected Constant Prepayment Rate | Minimum
Fair Value, Option, Quantitative Disclosures [Line Items]
Securities available-for-sale, measurement input	0.000	0.000
Recurring | Level 3 | Securities – Available-for-Sale: Non-Agency RMBS | Projected Constant Prepayment Rate | Maximum
Fair Value, Option, Quantitative Disclosures [Line Items]
Securities available-for-sale, measurement input	0.300	0.300
Recurring | Level 3 | Securities – Available-for-Sale: Non-Agency RMBS | Projected Constant Prepayment Rate | Weighted Average
Fair Value, Option, Quantitative Disclosures [Line Items]
Securities available-for-sale, measurement input	0.230	0.214
Recurring | Level 3 | Securities – Available-for-Sale: Non-Agency RMBS | Projected Constant Default Rate | Minimum
Fair Value, Option, Quantitative Disclosures [Line Items]
Securities available-for-sale, measurement input	0.000	0.000
Recurring | Level 3 | Securities – Available-for-Sale: Non-Agency RMBS | Projected Constant Default Rate | Maximum
Fair Value, Option, Quantitative Disclosures [Line Items]
Securities available-for-sale, measurement input	0.051	0.079
Recurring | Level 3 | Securities – Available-for-Sale: Non-Agency RMBS | Projected Constant Default Rate | Weighted Average
Fair Value, Option, Quantitative Disclosures [Line Items]
Securities available-for-sale, measurement input	0.023	0.022
Recurring | Level 3 | Securities – Available-for-Sale: Non-Agency RMBS | Projected Loss Severity | Minimum
Fair Value, Option, Quantitative Disclosures [Line Items]
Securities available-for-sale, measurement input	0.000	0.000
Recurring | Level 3 | Securities – Available-for-Sale: Non-Agency RMBS | Projected Loss Severity | Maximum
Fair Value, Option, Quantitative Disclosures [Line Items]
Securities available-for-sale, measurement input	0.687	0.684
Recurring | Level 3 | Securities – Available-for-Sale: Non-Agency RMBS | Projected Loss Severity | Weighted Average
Fair Value, Option, Quantitative Disclosures [Line Items]
Securities available-for-sale, measurement input	0.285	0.267
Recurring | Level 3 | Securities – Available-for-Sale: Non-Agency RMBS | Discount Rate | Minimum
Fair Value, Option, Quantitative Disclosures [Line Items]
Securities available-for-sale, measurement input	0.026	0.027
Recurring | Level 3 | Securities – Available-for-Sale: Non-Agency RMBS | Discount Rate | Maximum
Fair Value, Option, Quantitative Disclosures [Line Items]
Securities available-for-sale, measurement input	0.064	0.093
Recurring | Level 3 | Securities – Available-for-Sale: Non-Agency RMBS | Discount Rate | Weighted Average
Fair Value, Option, Quantitative Disclosures [Line Items]
Securities available-for-sale, measurement input	0.027	0.028
Recurring | Level 3 | Mortgage Servicing Rights
Fair Value, Option, Quantitative Disclosures [Line Items]
Mortgage servicing rights	$ 25,396	$ 25,213
Recurring | Level 3 | Mortgage Servicing Rights | Projected Constant Prepayment Rate | Minimum
Fair Value, Option, Quantitative Disclosures [Line Items]
Mortgage servicing right, measurement input	0.046	0.079
Recurring | Level 3 | Mortgage Servicing Rights | Projected Constant Prepayment Rate | Maximum
Fair Value, Option, Quantitative Disclosures [Line Items]
Mortgage servicing right, measurement input	0.331	0.563
Recurring | Level 3 | Mortgage Servicing Rights | Projected Constant Prepayment Rate | Weighted Average
Fair Value, Option, Quantitative Disclosures [Line Items]
Mortgage servicing right, measurement input	0.098	0.110
Recurring | Level 3 | Mortgage Servicing Rights | Discount Rate | Minimum
Fair Value, Option, Quantitative Disclosures [Line Items]
Mortgage servicing right, measurement input	0.095	0.095
Recurring | Level 3 | Mortgage Servicing Rights | Discount Rate | Maximum
Fair Value, Option, Quantitative Disclosures [Line Items]
Mortgage servicing right, measurement input	0.115	0.115
Recurring | Level 3 | Mortgage Servicing Rights | Discount Rate | Weighted Average
Fair Value, Option, Quantitative Disclosures [Line Items]
Mortgage servicing right, measurement input	0.096	0.095
Recurring | Level 3 | Mortgage Servicing Rights | Life (in years) | Minimum
Fair Value, Option, Quantitative Disclosures [Line Items]
Mortgage servicing right, measurement input | year	0.4	1.2
Recurring | Level 3 | Mortgage Servicing Rights | Life (in years) | Maximum
Fair Value, Option, Quantitative Disclosures [Line Items]
Mortgage servicing right, measurement input | year	15.9	9.9
Recurring | Level 3 | Mortgage Servicing Rights | Life (in years) | Weighted Average
Fair Value, Option, Quantitative Disclosures [Line Items]
Mortgage servicing right, measurement input | year	9.3	8.4
Recurring | Level 3 | Derivative Instruments, net
Fair Value, Option, Quantitative Disclosures [Line Items]
Derivative Instruments	$ (656)	$ 464
Recurring | Level 3 | Derivative Instruments, net | Projected Sales Profit of Underlying Loans | Minimum
Fair Value, Option, Quantitative Disclosures [Line Items]
Derivative instruments, net, measurement input	(0.016)	(0.031)
Recurring | Level 3 | Derivative Instruments, net | Projected Sales Profit of Underlying Loans | Maximum
Fair Value, Option, Quantitative Disclosures [Line Items]
Derivative instruments, net, measurement input	0.007	0.008
Recurring | Level 3 | Derivative Instruments, net | Projected Sales Profit of Underlying Loans | Weighted Average
Fair Value, Option, Quantitative Disclosures [Line Items]
Derivative instruments, net, measurement input	(0.001)	(0.012)