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Fair Value of Financial Assets and Liabilities - Additional Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2024 | Dec. 31, 2023 | Sep. 30, 2024 | Jun. 30, 2024 | Sep. 30, 2023 | Jun. 30, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Unpaid balance on loans sold with retained servicing rights | $ 4,600,000 | $ 3,100,000 | $ 7,400,000 | $ 5,200,000 |  |  |  |
Unpaid principal balance on serviced sold loans | 6,900,000 |  | 6,900,000 |  |  | $ 5,100,000 |  |
Servicing income | 28,690 | 22,436 | 54,674 | 42,593 |  |  |  |
Servicing assets | 800 |  | 800 |  |  | 600 |  |
Servicing liabilities | $ 200 |  | $ 200 |  |  | 700 |  |
Fair value, liability, recurring basis, unobservable input reconciliation, gain (loss), statement of income or comprehensive income |  |  | Other income, net |  |  |  |  |
Economic risk retention | 5.00% |  | 5.00% |  |  |  |  |
Notional Amount | $ 572,441 |  | $ 572,441 |  |  | 1,004,589 |  |
Derivative instruments | 7,676 |  | 7,676 |  |  | 17,207 |  |
Derivative Liabilities | 186 |  | 186 |  |  | 38 |  |
Risk Sharing Arrangement |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Derivative instruments | 45,000 |  | 45,000 |  |  | 33,900 |  |
Credit Risk Contract |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Notional Amount | 6,800,000 |  | 6,800,000 |  |  | 4,200,000 |  |
Loss sharing arrangement, maximum exposure to losses | 85,100 |  | 85,100 |  |  | 81,200 |  |
Risk Sharing Liabilities |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Loss sharing arrangement, maximum exposure to losses | 40,100 |  | 40,100 |  |  |  |  |
Risk Sharing Assets |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Loss sharing arrangement, maximum exposure to losses | 45,000 |  | 45,000 |  |  |  |  |
Senior Notes and Residual Trust Certificates |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Aggregate fair value | 69,051 | 32,411 | 69,051 | 32,411 | $ 38,926 | 51,670 | $ 13,983 | $ 18,913
Risk Sharing Arrangement |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Aggregate fair value | 1,498 | $ 512 | 1,498 | $ 512 | $ 1,801 | 918 | $ 471 | $ 0
Derivative Liabilities | $ 1,500 |  | $ 1,500 |  |  | $ 900 |  |

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