Debt - Schedule of Debt (Parenthetical) (Detail) - Term SOFR [Member]	9 Months Ended
Jun. 30, 2023
Revolving Credit Facility [Member]
Schedule of Debt [Line Items]
Description of variable rate basis	Term SOFR + 3.00%
Debt instrument, basis spread on variable rate	3.00%
Maturity date	Oct. 01, 2027
Secured Term Loan Facilities [Member] \| Tranche 1 [Member]
Schedule of Debt [Line Items]
Description of variable rate basis	Term SOFR +5.75%
Debt instrument, basis spread on variable rate	5.75%
Maturity date	Oct. 01, 2027

Date when the debt instrument is scheduled to be fully repaid, in YYYY-MM-DD format.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(2))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 1B
-Subparagraph (d)
-URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258

Name:	us-gaap_DebtInstrumentMaturityDate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration