New Accounting Pronouncements - Additional Information (Detail) - USD ($) $ in Thousands	Sep. 30, 2022	Sep. 30, 2021	Oct. 01, 2019
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Operating lease, liabilities	$ 99,350
Operating lease right-of-use assets, net	96,837	$ 104,901
Cumulative effect adjustment to retained earnings, net after tax	$ 630,667	$ 432,678
Accounting Standards Update 2016-02 [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Operating lease, liabilities			$ 44,000
Operating lease right-of-use assets, net			42,100
Accounting Standards Update 2016-02 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Cumulative effect adjustment to retained earnings, net after tax			$ 600