Fair Value Measurements - Summary of Fair Value, Assets and Liabilities Measured on Recurring Basis (Detail) - USD ($) $ in Thousands	Sep. 30, 2022	Sep. 30, 2021
Derivative Asset, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other Assets, Noncurrent
Derivative Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]		Other Liabilities, Noncurrent
Interest rate swap agreements [Member]
Derivative Asset, Noncurrent	$ 1,421
Derivative Liability, Noncurrent		$ (203)
Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 1 [Member] \| Interest rate swap agreements [Member]
Derivative Asset, Noncurrent	0
Derivative Liability, Noncurrent		0
Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 2 [Member] \| Interest rate swap agreements [Member]
Derivative Asset, Noncurrent	1,421
Derivative Liability, Noncurrent		(203)
Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 3 [Member] \| Interest rate swap agreements [Member]
Derivative Asset, Noncurrent	$ 0
Derivative Liability, Noncurrent		$ 0

Indicates line item in statement of financial position that includes derivative asset classified as noncurrent.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4A
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5618551-113959

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- Definition

Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled after one year or the normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312

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- Definition

Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled after one year or the normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset.

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- Definition

Indicates line item in statement of financial position that includes derivative liability classified as noncurrent.

+ References

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