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Debit and Credit Arrangements - Debt and Credit Arrangements (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Short-term debt    
Current portion of long-term debt $ 195 $ 251
Short-term debt 1,300 468
Long-term debt    
Total long-term debt 13,249 9,573
Less current portion (195) (251)
Total long-term debt, less current portion 13,054 9,322
Total debt 14,354 9,790
USD Denominated Long-term Debt [Member]
   
Long-term debt    
Total long-term debt 12,604 9,236
Australian Dollar Denominated Term Loans Long-term Debt [Member]
   
Long-term debt    
Total long-term debt 570 70
Brazilian Real Denominated Term Loan Long-Term Debt [Member]
   
Long-term debt    
Total long-term debt 75 267
Brazilian Real Denominated Secured Notes Short Term Debt [Member]
   
Short-term debt    
Short-term debt 1,105 0
New Zealand Dollar [Member]
   
Short-term debt    
Short-term debt $ 0 $ 217