Income Taxes - Reconcilliation of Effective Income Tax Rate (Details)	12 Months Ended
	Feb. 29, 2016	Feb. 28, 2015	Feb. 28, 2014
Income Tax Disclosure [Abstract]
Statutory federal income tax rate	35.00%	35.00%	35.00%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Meals and Entertainment, Percent	0.40%	0.60%	1.30%
State income taxes, net of federal income tax benefit	(1.50%)	2.70%	3.00%
Benefit of Section 199 of the Code, manufacturing deduction	2.70%	2.40%	2.20%
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent	(1.20%)	(3.40%)	0.00%
Other	0.00%	(0.50%)	0.00%
Effective income tax rate	26.40%	27.90%	36.50%
Effective Income Tax Rate Reconciliation, Tax Credit, Percent	(3.20%)	(3.40%)	0.00%
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent	(0.40%)	(0.70%)	(0.60%)