Supplemental Disclosure of Cash Flow Information - Schedule of Supplemental Disclosure of Cash Flow Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Cash paid during the period for:
Income taxes, net	$ 17,122	$ 21,936	$ 25,292
Interest	$ 10,077	$ 8,928	$ 11,722