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Fair Value and Estimated Useful Lives of Intangibles, Accounting Plaza (Detail) (Customer-Related Intangible Assets, USD $) In Thousands, unless otherwise specified	9 Months Ended		1 Months Ended
	Sep. 30, 2013 Minimum	Sep. 30, 2013 Maximum	Apr. 25, 2012 Accounting Plaza B.V. ("Accounting Plaza")	Apr. 25, 2012 Accounting Plaza B.V. ("Accounting Plaza") Minimum	Apr. 25, 2012 Accounting Plaza B.V. ("Accounting Plaza") Maximum
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets value			$ 13,138
Intangible assets estimated useful lives	1 year	14 years		3 years	10 years

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- Definition

Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, resulting from a business combination.

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No definition available.

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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.

+ References

No definition available.

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