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LOANS HELD FOR INVESTMENT, NET - Performance of Modified Loans, After 12 Months (Details) - USD ($) $ in Thousands | Mar. 31, 2025 | Mar. 31, 2024
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Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Loans that defaulted during the quarter and were modified in the 12 months before default to borrowers experiencing financial difficulty | $ 90,596 | $ 149,376
Current |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Loans that defaulted during the quarter and were modified in the 12 months before default to borrowers experiencing financial difficulty | 46,651 | 100,451
30 to 59 Days Past Due |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Loans that defaulted during the quarter and were modified in the 12 months before default to borrowers experiencing financial difficulty | 27,603 | 12,651
60 to 89 Days Past Due |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Loans that defaulted during the quarter and were modified in the 12 months before default to borrowers experiencing financial difficulty |  | 21,790
Non-Accrual |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Loans that defaulted during the quarter and were modified in the 12 months before default to borrowers experiencing financial difficulty | 16,342 | 14,484
Business Loans |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Loans that defaulted during the quarter and were modified in the 12 months before default to borrowers experiencing financial difficulty | 19,144 | 16,074
Business Loans | Current |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Loans that defaulted during the quarter and were modified in the 12 months before default to borrowers experiencing financial difficulty | 18,899 | 13,694
Business Loans | 60 to 89 Days Past Due |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Loans that defaulted during the quarter and were modified in the 12 months before default to borrowers experiencing financial difficulty |  | 240
Business Loans | Non-Accrual |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Loans that defaulted during the quarter and were modified in the 12 months before default to borrowers experiencing financial difficulty | 245 | 2,140
One-to-Four Family Residential and Cooperative/Condominium Apartment |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Loans that defaulted during the quarter and were modified in the 12 months before default to borrowers experiencing financial difficulty | 892 | 3,353
One-to-Four Family Residential and Cooperative/Condominium Apartment | Current |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Loans that defaulted during the quarter and were modified in the 12 months before default to borrowers experiencing financial difficulty |  | 3,262
One-to-Four Family Residential and Cooperative/Condominium Apartment | Non-Accrual |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Loans that defaulted during the quarter and were modified in the 12 months before default to borrowers experiencing financial difficulty | 892 | 91
Multifamily Residential and Residential Mixed-Use |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Loans that defaulted during the quarter and were modified in the 12 months before default to borrowers experiencing financial difficulty | 27,603 | 61,832
Multifamily Residential and Residential Mixed-Use | Current |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Loans that defaulted during the quarter and were modified in the 12 months before default to borrowers experiencing financial difficulty |  | 27,631
Multifamily Residential and Residential Mixed-Use | 30 to 59 Days Past Due |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Loans that defaulted during the quarter and were modified in the 12 months before default to borrowers experiencing financial difficulty | 27,603 | 12,651
Multifamily Residential and Residential Mixed-Use | 60 to 89 Days Past Due |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Loans that defaulted during the quarter and were modified in the 12 months before default to borrowers experiencing financial difficulty |  | 21,550
Non-Owner-Occupied Commercial Real Estate |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Loans that defaulted during the quarter and were modified in the 12 months before default to borrowers experiencing financial difficulty | 42,957 | 55,864
Non-Owner-Occupied Commercial Real Estate | Current |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Loans that defaulted during the quarter and were modified in the 12 months before default to borrowers experiencing financial difficulty | 27,752 | 55,864
Non-Owner-Occupied Commercial Real Estate | Non-Accrual |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Loans that defaulted during the quarter and were modified in the 12 months before default to borrowers experiencing financial difficulty | $ 15,205 |
Acquisition, development, and construction ("ADC") |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Loans that defaulted during the quarter and were modified in the 12 months before default to borrowers experiencing financial difficulty |  | 12,253
Acquisition, development, and construction ("ADC") | Non-Accrual |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Loans that defaulted during the quarter and were modified in the 12 months before default to borrowers experiencing financial difficulty |  | $ 12,253

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