Pension Plan - Additional Information (Detail) (USD $)	12 Months Ended
	Feb. 28, 2014	Feb. 28, 2013	Feb. 29, 2012
Defined Benefit Plan Disclosure [Line Items]
Employees covered under Non Contributory Pension Plan	8.00%
Compensation period preceding retirement and termination	5 years
Company estimates the long-term rate of return on plan assets	8.00%
Target asset allocation, historical period	10 years
Target asset allocation, expected returns	5 years
Expected rate of return	8.00%	8.00%	8.00%
Expected Contribution	$ 3,000,000	$ 3,000,000
Matching contributions	925,000	815,000	576,000
United States employees contribution	100.00%
Profit sharing contributions	254,000	258,000	268,000
Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected Contribution	2,000,000
Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected Contribution	$ 3,000,000