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Non-cancelable Contractual Obligations (Detail) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2014
Commitments And Contingencies Disclosure [Abstract]  
2014 (6 months) $ 38,215
2015 42,778
2016 40,188
2017 23,940
2018 5,704
Total purchase commitments $ 150,825