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Goodwill and Other Intangible Assets - Schedule of Future Estimated Amortization of Intangibles (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]  
2015 $ 159,990us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths
2016 160,074us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
2017 156,908us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree
2018 153,232us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour
2019 137,495us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive
Thereafter $ 1,332,201us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive