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Other Income (Expense) - Summary of Other Income (Expenses) (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Other Income And Expenses [Abstract]    
Gain related to demutualization of a mutual insurance company $ 4,406  
Transactional foreign currency exchange gains (losses) 623 (470)
Other (265) (161)
Total $ 4,764 $ (631)