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Goodwill and Intangible Assets - Summary of Changes to Goodwill (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2017 | Sep. 30, 2016
Goodwill [Roll Forward] |  |
Beginning Balance | $ 798,415 | $ 814,750
Addition from acquisitions |  | 3,857
Adjustment related to prior acquisitions |  | 283
Foreign currency translation adjustment | 5,999 | (20,475)
Ending Balance | 804,414 | 798,415
Applications |  |
Goodwill [Roll Forward] |  |
Beginning Balance | 582,720 | 596,765
Addition from acquisitions |  | 3,857
Adjustment related to prior acquisitions |  | 283
Foreign currency translation adjustment | 5,568 | (18,185)
Ending Balance | 588,288 | 582,720
Scores |  |
Goodwill [Roll Forward] |  |
Beginning Balance | 146,648 | 146,648
Addition from acquisitions |  | 0
Adjustment related to prior acquisitions |  | 0
Foreign currency translation adjustment | 0 | 0
Ending Balance | 146,648 | 146,648
Decision Management Software |  |
Goodwill [Roll Forward] |  |
Beginning Balance | 69,047 | 71,337
Addition from acquisitions |  | 0
Adjustment related to prior acquisitions |  | 0
Foreign currency translation adjustment | 431 | (2,290)
Ending Balance | $ 69,478 | $ 69,047

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- 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975 + Details
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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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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- Definition Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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