Income Taxes - Reconcilliation of Effective Income Tax Rate (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Feb. 28, 2014	Feb. 28, 2013	Feb. 29, 2012
Income Tax Disclosure [Abstract]
Statutory federal income tax rate	35.00%	35.00%	35.00%
Expenses not deductible for tax purposes	3.90%	0.20%	0.30%
State income taxes, net of federal income tax benefit	4.70%	3.10%	3.60%
Benefit of Section 199 of the Code, manufacturing deduction	(6.50%)	(2.60%)	(2.80%)
Other	(0.60%)	0.20%	(0.10%)
Effective income tax rate	36.50%	35.90%	36.00%
Deferred taxes not provided, foreign currency translation adjustment	$ 11.4