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Pension Plan - Schedule of Estimated Future Benefit Payments which Reflect Expected Future Service (Detail)
$ in Thousands
Feb. 28, 2017
USD ($)
Schedule Of Sale Of Subsidiary [Abstract]  
2018 $ 4,100
2019 4,100
2020 4,200
2021 4,300
2022 4,300
2023 - 2027 $ 18,700