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Summary of Acquisition (Detail) (Global Novations, LLC, USD $) In Thousands, unless otherwise specified | 3 Months Ended
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Oct. 31, 2012
Global Novations, LLC |
Business Acquisition [Line Items] |
Assets acquired | $ 8,008
Intangibles acquired | 12,200
Liabilities acquired | 6,258
Net assets acquired | 13,950
Purchase price | 34,437
Goodwill | 20,487
Acquisition costs | $ 650

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