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Summary of Changes to Goodwill (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended				3 Months Ended
	Dec. 31, 2013	Dec. 31, 2013 Applications	Dec. 31, 2013 Scores	Sep. 30, 2013 Scores	Dec. 31, 2013 Tools
Goodwill [Line Items]
Beginning Balance	$ 773,931	$ 559,538	$ 146,648	$ 146,648	$ 67,745
Adjustments related to prior acquisitions	(770)	(770)
Foreign currency translation adjustment	3,670	3,035			635
Ending Balance	$ 776,831	$ 561,803	$ 146,648	$ 146,648	$ 68,380

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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

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

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Amount of increase (decrease) from adjustments after acquisition date under purchase accounting of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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-Publisher FASB

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-SubTopic 20

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+ References

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