OPERATING LEASE RIGHT-OF-USE ASSETS AND LIABILITIES - Narrative (Details) - USD ($) $ in Thousands |
Jun. 30, 2026 |
Sep. 30, 2025 |
|---|---|---|
| Leases [Abstract] | ||
| Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] | Other assets | Other assets |
| Operating lease, right-of-use asset | $ 21,400 | $ 22,700 |
| Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration] | Accrued expenses and other liabilities | Accrued expenses and other liabilities |
| Operating lease, liability | $ 22,740 | $ 24,000 |