Pension Plan - Additional Information (Detail) - USD ($)	12 Months Ended
	Feb. 28, 2019	Feb. 28, 2018	Feb. 28, 2017
Defined Benefit Plan Disclosure [Line Items]
Employees covered under noncontributory Pension Plan	17.00%
Compensation period preceding retirement and termination	5 years
Expected rate of return	7.50%	7.50%	7.50%
Target asset allocation, historical period	10 years
Target asset allocation, expected returns	5 years
Company contributions	$ 3,000,000	$ 3,000,000
Matching contributions	$ 1,700,000	1,200,000	$ 1,200,000
United States employees contribution	100.00%
Profit sharing contributions	$ 206,000	$ 203,000	$ 228,000
Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected contributions	1,000,000
Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected contributions	$ 1,500,000