Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2019
Income Taxes Disclosure [Line Items]
Deferred tax assets operating loss and tax credit carryforwards	$ 12,108	$ 12,711
Deferred tax assets	21,380	20,319
Unrecognized income tax benefits	774	700	$ 568	$ 509
Amount of unrecognized tax benefits which would favorably affect the effective tax rate if recognized	700
Penalties and interest	24	31
Accrued for the payment of interest and penalties	$ 194	170
Uncertain tax positions expected to be paid or settled	12 months
Cash paid for income taxes	$ 26,824	27,466	$ 9,816
Presumed repatriation of foreign earnings	283	865
Deferred tax assets, change in valuation allowance	$ 1,125	1,322
Domestic [Member]
Income Taxes Disclosure [Line Items]
Deferred tax assets operating loss and tax credit carryforwards		179
Open Tax Years	fiscal 2018 remain open
Foreign [Member]
Income Taxes Disclosure [Line Items]
Deferred tax assets operating loss and tax credit carryforwards	$ 12,108	$ 12,532
Aggregate amount of state and foreign operating loss carryforwards	$ 87,000
Open Tax Years	2017 and forward