Pension Plan and Other Employee Benefits - Additional Information (Detail) - USD ($)	12 Months Ended
	Feb. 28, 2019	Feb. 28, 2018	Feb. 28, 2017	Feb. 29, 2016
Defined Benefit Plan Disclosure [Line Items]
Employees covered under noncontributory Pension Plan		20.00%
Compensation period preceding retirement and termination		5 years
Expected rate of return		7.50%	7.50%	8.00%
Target asset allocation, historical period		10 years
Target asset allocation, expected returns		5 years
Expected contributions		$ 3,000,000	$ 3,000,000
Matching contributions		$ 1,200,000	1,200,000	$ 1,200,000
United States employees contribution		100.00%
Profit sharing contributions		$ 203,000	$ 228,000	$ 229,000
Scenario Forecast [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected contributions	$ 3,000,000