Annual report pursuant to Section 13 and 15(d)

Intangible Assets - Summary of Amortization Expense for Intangible Assets for Each of Next Five Years (Detail)

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Intangible Assets - Summary of Amortization Expense for Intangible Assets for Each of Next Five Years (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]  
Amortization expense, 2015 $ 9,148us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths
Amortization expense, 2016 8,691us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
Amortization expense, 2017 8,273us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree
Amortization expense, 2018 7,960us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour
Amortization expense, 2019 $ 7,559us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive