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Estimated Amortization Expense for Intangible Assets, by Year (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Finite-Lived Intangible Liabilities [Line Items]  
2015 $ 1,119us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths
2016 1,040us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
2017 828us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree
2018 631us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour
2019 444us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive
2020 and thereafter 2,115us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive
Finite lived intangibles, net $ 6,177us-gaap_FiniteLivedIntangibleAssetsNet