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Acquisitions and Divestiture of a Subsidiary - Additional Information (Detail) |  | 12 Months Ended
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Nov. 10, 2020 USD ($) | Sep. 30, 2023 USD ($) | Sep. 30, 2022 USD ($) Business | Sep. 30, 2021 USD ($) Business
Acquisitions and Divestiture of a Subsidiary [Line Items] |  |  |  |
Number of businesses acquired | Business |  |  | 2 | 3
Business divestiture pre-tax gain | $ 300,000 |  | $ 10,000 |
Disposal Group Not Discontinued Operation Gain Loss On Disposals |  |  |  | $ 226,410
Disposal Group, Including Discontinued Operation, Net assets |  |  |  | 9,194
Disposal Group, Including Discontinued Operation, Goodwill |  |  |  | 61,396
DevOps and Roam [Member] |  |  |  |
Acquisitions and Divestiture of a Subsidiary [Line Items] |  |  |  |
Business acquisition |  |  | $ 54,091,000 |
Teoco and ProCom [Member] |  |  |  |
Acquisitions and Divestiture of a Subsidiary [Line Items] |  |  |  |
Business acquisition |  | $ 130,318,000 |  |
Description of business entity acquisitions |  | the Company completed three immaterial business acquisitions |  |
Sourced [Member] |  |  |  |
Acquisitions and Divestiture of a Subsidiary [Line Items] |  |  |  |
Business acquisition |  |  |  | $ 101,864,000

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- Definition With respect to a business combination completed during the period, this element provides a description of the business, other than the name, which may include the industry, size, products and other important information. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479328/805-10-50-2 + Details
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- Definition Amount classified as goodwill attributable to disposal group held for sale or disposed of. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 10 -SubTopic 20 -Topic 205 -Publisher FASB -URI https://asc.fasb.org//1943274/2147483475/205-20-45-10 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 205 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5B -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483499/205-20-50-5B Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 360 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482099/360-10-50-3 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 205 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 11 -Publisher FASB -URI https://asc.fasb.org//1943274/2147483475/205-20-45-11 + Details
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- Definition The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 805 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479581/805-30-50-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-13 + Details
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