Quarterly report pursuant to sections 13 or 15(d)

Changes in Carrying Value of Contingent Consideration Classified as Accounts Payable and Accrued Liabilities (Detail)

Changes in Carrying Value of Contingent Consideration Classified as Accounts Payable and Accrued Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2012	Nov. 04, 2011
Business Acquisition, Contingent Consideration [Line Items]
Fair value of contingent consideration, beginning of period		$ 7,111	$ 7,111
Change in fair value of contingent consideration	(909)	(7,111)
Fair value of contingent consideration, end of period			$ 7,111

- Definition

Fair value, as of the acquisition date, of potential payments under the contingent consideration arrangement including cash and shares.

+ References

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

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Reference 6: http://www.xbrl.org/2003/role/presentationRef

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+ Details