Business combinations and disposal Business combinations and disposals - Assessments Australia (Details) $ in Thousands |
12 Months Ended | ||
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Dec. 15, 2015
USD ($)
company
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Sep. 30, 2016
USD ($)
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Sep. 30, 2017
USD ($)
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| Business Acquisition [Line Items] | |||
| Goodwill, acquired during period | $ 21,453 | ||
| Assessments Australia | |||
| Business Acquisition [Line Items] | |||
| Share capital acquired (as a percent) | 100.00% | ||
| Number of businesses acquired | company | 3 | ||
| Cash consideration | $ 2,600 | ||
| Contingent consideration, liability, current | $ 500 | ||
| Intangible assets | 400 | ||
| Human Services | Assessments Australia | |||
| Business Acquisition [Line Items] | |||
| Goodwill, acquired during period | $ 3,000 | $ 2,899 | |
| Customer relationships | Assessments Australia | |||
| Business Acquisition [Line Items] | |||
| Useful life | 6 years |
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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. No definition available.
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- Definition Percentage of voting equity interests acquired at the acquisition date in the business combination. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of liability recognized arising from contingent consideration in a business combination, expected to be settled within one year or the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The amount of identifiable intangible assets recognized as of the acquisition date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. No definition available.
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- Definition Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The number of businesses acquired by the entity during the period. No definition available.
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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. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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