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Property and Equipment - Component of Property and Equipment (Detail) - USD ($) $ in Thousands	Jun. 30, 2023	Sep. 30, 2022
Property, Plant and Equipment [Abstract]
Property and equipment	$ 247,206	$ 246,919
Less: accumulated depreciation and amortization	143,708	139,175
Property and equipment, net	$ 103,498	$ 107,744

X

- Definition

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(8)(b))
-Publisher FASB
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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-URI https://asc.fasb.org//1943274/2147482099/360-10-50-1

+ Details

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Balance Type:	credit
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X

- References

No definition available.

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X

- Definition

Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(8))
-Publisher FASB
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X

- Definition

Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-SubTopic 10
-Topic 360
-Publisher FASB
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Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 852
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
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-Paragraph 1
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-Topic 942
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