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Changes in Investment of Sagent Agila (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Schedule of Equity Method Investments [Line Items]        
Investment at beginning of year     $ 19,622  
Equity in net loss (income) of joint ventures 160 (105) 603 351
Investment at end of year 2,016   2,016  
Sagent Agila LLC
       
Schedule of Equity Method Investments [Line Items]        
Investment at beginning of year     2,161  
Equity in net loss (income) of joint ventures     1,222  
Dividends paid     (1,367)  
Investment at end of year $ 2,016   $ 2,016