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Pension Plan - Schedule of Estimated Future Benefit Payments which Reflect Expected Future Service (Detail) (USD $)
In Thousands, unless otherwise specified
Feb. 28, 2015
Schedule Of Sale Of Subsidiary [Abstract]  
2016 $ 3,500us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths
2017 3,600us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo
2018 3,700us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree
2019 3,800us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour
2020 4,000us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive
2021 - 2025 $ 16,300us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter