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Summary of Different Loans in Place Constitute Short-Term and Long-Term Loan Balances Together (Detail) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2013
Dec. 31, 2012
Extinguishment of Debt [Line Items]    
Long Term debt $ 40,911 $ 36,196
Short-term 70 16,247
Total indebtedness 40,981 52,443
Term Loan
    
Extinguishment of Debt [Line Items]    
Long Term debt   36,000
Short-term   10,000
Total indebtedness   46,000
Working capital revolver
    
Extinguishment of Debt [Line Items]    
Long Term debt 40,750  
Total indebtedness 40,750  
Notes payable on product acquisitions and asset purchase
    
Extinguishment of Debt [Line Items]    
Long Term debt 161 196
Short-term 70 6,247
Total indebtedness $ 231 $ 6,443