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STOCKHOLDERS' EQUITY (Details) - Class A Common Stock - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 6 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Mar. 31, 2026 | Mar. 31, 2026 | Mar. 31, 2025 | Feb. 05, 2026 | Aug. 07, 2025 | Aug. 08, 2024
Share Repurchase Program [Line Items] |  |  |  |  |  |
Authorized amount |  |  |  | $ 60,000 | $ 50,000 | $ 50,000
Shares repurchased (in shares) | 2,220,736 | 3,743,574 |  |  |  |
Average cost per share (in usd per share) | $ 22.70 | $ 23.59 |  |  |  |
Excise taxes and commissions | $ 50,979 | $ 89,296 |  |  |  |
August 2024 Repurchase Program |  |  |  |  |  |
Share Repurchase Program [Line Items] |  |  |  |  |  |
Shares repurchased (in shares) |  |  | 510,155 |  |  |
Average cost per share (in usd per share) |  |  | $ 22.51 |  |  |
Value of shares repurchased |  |  | $ 11,613 |  |  |
New Share Repurchase Program |  |  |  |  |  |
Share Repurchase Program [Line Items] |  |  |  |  |  |
Shares repurchased (in shares) | 1,703,682 | 1,703,682 |  |  |  |
Average cost per share (in usd per share) | $ 22.48 | $ 22.48 |  |  |  |
Excise taxes and commissions | $ 38,735 | $ 38,735 |  |  |  |
August 2025 Share Repurchase Program |  |  |  |  |  |
Share Repurchase Program [Line Items] |  |  |  |  |  |
Shares repurchased (in shares) | 517,054 | 2,039,892 |  |  |  |
Average cost per share (in usd per share) | $ 23.42 | $ 24.51 |  |  |  |
Excise taxes and commissions |  | $ 50,561 |  |  |  |

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