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Acquisitions - Additional Information (Details) AUD in Thousands, $ in Thousands | 1 Months Ended | 9 Months Ended
--- | --- | ---
Jun. 30, 2017 USD ($) | Jun. 30, 2017 AUD | Sep. 30, 2017 USD ($) | Sep. 30, 2016 USD ($)
Business Acquisition [Line Items] |  |  |  |
Business acquisitions, net of cash acquired |  |  | $ 835 | $ 0
Careers Australia |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Business acquisitions, net of cash acquired | $ 835 | AUD 1,107 |  |
Debt assumed | $ 7,433 | AUD 9,850 |  |

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- Definition Amount of liabilities incurred by the acquirer as part of consideration transferred in a business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 25 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6911189&loc=d3e6405-128476 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6613-128477 + Details
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