Supplemental Disclosure of Cash Flow Information - Schedule of Supplemental Disclosure of Cash Flow Information (Parenthetical) (Detail) - USD ($) $ in Thousands	1 Months Ended	9 Months Ended
	Jul. 31, 2020	Jun. 30, 2020	[1]	Jun. 30, 2019
Cash Flow Supplemental Disclosures [Line Items]
Tax payments		$ 9,988		$ 3,046
Subsequent Event
Cash Flow Supplemental Disclosures [Line Items]
Tax payments	$ 8,500

[1] In July 2020, the Company made $8.5 million in tax payments that were deferred from April and June.