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Segment Information - Reconciliation from Segments to Consolidated (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Mar. 31, 2026	Mar. 31, 2025
Segment Reporting [Abstract]
Total segment direct profit	$ 55,870	$ 47,429	$ 112,904	$ 97,596
Other costs and expenses from operations	46,146	40,369	93,808	83,333
Interest and other income, net	(948)	(646)	(2,093)	(1,633)
Income before provision for income taxes	$ 10,672	$ 7,706	$ 21,189	$ 15,896

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