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Schedule of Company's Obligations Under Product Acquisitions and Licensing Agreements (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Business Acquisition, Contingent Consideration [Line Items]      
Beginning Balance $ 11,900 $ 17,624 $ 12,822
Additional obligations acquired   1,073 216
Addition of deferred liabilities     6,802
Adjustment to deferred liabilities (294) (216) (2,857)
FX impact (1) 48 101
Amortization of discounted liabilities 171 818 1,341
Payments on existing obligations (7,890) (7,447) (801)
Ending Balance $ 3,886 $ 11,900 $ 17,624