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Estimated Future Intangible Asset Amortization Expense (Detail) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2014
Sep. 30, 2013
Estimated future intangible asset amortization expense    
2014 [excluding the nine months ended June 30, 2014] $ 3,010  
2015 12,164  
2016 11,935  
2017 10,773  
2018 3,314  
Thereafter 10,857  
Total $ 52,053 $ 57,361