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Acquisitions - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified |
3 Months Ended |
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Mar. 31, 2012
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| Acquired Finite-Lived Intangible Assets [Line Items] | |
| Payment for deposit on acquisition | $ 14.4 |
| X | ||||||||||
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- Definition
Deposit on acquisition of business. No definition available.
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| X | ||||||||||
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- Details
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