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Schedule - Valuation and Qualifying Accounts (Parenthetical) (Detail) - USD ($) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Sep. 30, 2013 | Sep. 30, 2015 | Sep. 30, 2014
Valuation and Qualifying Accounts Disclosure [Line Items] |  |  |
Valuation allowances on deferred tax assets written off against the deferred tax assets | $ 7,707 | $ 2,235 | $ 9,641
Series of Individually Immaterial Business Acquisitions [Member] |  |  |
Valuation and Qualifying Accounts Disclosure [Line Items] |  |  |
Allowances for accounts receivable acquired | $ 109 |  |

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- Definition Valuation allowances on deferred tax assets written off against the deferred tax assets. + References No definition available. + Details
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- Definition Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs, charged to accounts other than costs and expenses in a given period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 09 -Article 12 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Details
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