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Accrued Liabilities (Detail) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2013
Dec. 31, 2012
Certain Balance Sheet Items [Abstract]    
Rebates and other sales deductions $ 31,799 $ 29,235
Sales returns reserve 24,039 26,385
Employee compensation and benefits 17,739 24,900
Royalties 3,898 3,271
Professional fees 1,660 2,163
Other 17,636 18,712
Total accrued liabilities $ 96,771 $ 104,666