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Long-Lived Assets - Summary of Estimated Amortization of Intangible Assets for Future Periods (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Property, Plant and Equipment [Abstract]    
2014 $ 4,735us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths  
2015 4,160us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo  
2016 2,886us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree  
2017 2,500us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour  
2018 2,500us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive  
Thereafter 2,917us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive  
Total $ 19,698us-gaap_FiniteLivedIntangibleAssetsNet $ 25,368us-gaap_FiniteLivedIntangibleAssetsNet