Pension Plan and Other Employee Benefits - Schedule of Estimated Future Benefit Payments which Reflect Expected Future Service (Detail) $ in Thousands	Feb. 28, 2018 USD ($)
Schedule Of Sale Of Subsidiary [Abstract]
2019	$ 4,200
2020	4,200
2021	4,300
2022	4,200
2023	4,100
2024 - 2028	$ 19,000