v3.3.0.814
Intangible Assets - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Intangible Assets [Line Items]        
Amortization Expense $ 29,500 $ 25,100 $ 77,947 $ 76,909
Expected amortization of intangibles, 2015 95,600   95,600  
Expected amortization of intangibles, 2016 85,600   85,600  
Expected amortization of intangibles, 2017 46,500   46,500  
Expected amortization of intangibles, 2018 46,500   46,500  
Expected amortization of intangibles, 2019 $ 46,400   $ 46,400  
Intangible assets expected to amortize over a weighted-average period     6 years 6 months