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Patents and Other Intangible Assets - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2013
Future Amortization expense  
2014 $ 2.1us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths
2015 1.8us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
2016 1.7us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree
2017 1.4us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour
2018 0.5us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive
2019 and thereafter $ 1.5us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive