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NON-CONTROLLING INTEREST - Ownership Interest (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2026 | Mar. 31, 2025 | Mar. 31, 2026 | Mar. 31, 2025
Noncontrolling Interest [Abstract] |  |  |  |
Net income attributable to non-controlling interest | $ 730 | $ 923 | $ 1,193 | $ 1,975
Transfers from non-controlling interests: |  |  |  |
Distributions to non-controlling interest holders |  | $ 283 | 122 | 283
Redemption of common units in i3 Verticals, LLC |  |  | 0 | (11,730)
Recapitalization from contribution to i3 Verticals, LLC |  |  | 0 | 5,689
Allocation of equity from non-controlling interests |  |  | (8,600) | (3,356)
Net transfers from non-controlling interests |  |  | (8,478) | (9,114)
Change from net income attributable to non-controlling interests and net transfers from non-controlling interests |  |  | $ (7,285) | $ (7,139)

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