Business combinations and disposal Business combinations and disposals - Assessments Australia (Details) $ in Thousands |
Dec. 15, 2015
USD ($)
company
|
Sep. 30, 2018
USD ($)
|
Sep. 30, 2017
USD ($)
|
Sep. 30, 2016
USD ($)
|
---|---|---|---|---|
Business Acquisition [Line Items] | ||||
Goodwill | $ 399,882 | $ 402,976 | $ 397,558 | |
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 | 400 | ||
Intangible assets | 400 | |||
Human Services | ||||
Business Acquisition [Line Items] | ||||
Goodwill | $ 44,993 | $ 46,368 | $ 45,731 | |
Human Services | Assessments Australia | ||||
Business Acquisition [Line Items] | ||||
Goodwill | $ 3,000 | |||
Customer relationships | Assessments Australia | ||||
Business Acquisition [Line Items] | ||||
Useful life | 6 years |
X | ||||||||||
- 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.
|
X | ||||||||||
- Definition Percentage of voting equity interests acquired at the acquisition date in the business combination. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
X | ||||||||||
- 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://fasb.org/us-gaap/role/ref/legacyRef
|
X | ||||||||||
- Definition The amount of identifiable intangible assets recognized as of the acquisition date. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
X | ||||||||||
- 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.
|
X | ||||||||||
- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
X | ||||||||||
- Definition The number of businesses acquired by the entity during the period. No definition available.
|
X | ||||||||||
- 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/disclosureRef
|
X | ||||||||||
- Details
|
X | ||||||||||
- Details
|
X | ||||||||||
- Details
|