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INCOME TAXES - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2026
Mar. 31, 2025
Income Tax Disclosure [Abstract]        
Income tax expense $ 14,171 $ 16,166 $ 21,364 $ 22,171
Effective tax rate     16.50% 17.40%