Start-Up Costs - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Nov. 30, 2013
Segment Reporting Information [Line Items]
Start-up costs	$ 8.0
Maximum
Segment Reporting Information [Line Items]
Number of locations	450
Cost of Sales
Segment Reporting Information [Line Items]
Start-up costs	5.8
Selling, General and Administrative Expenses
Segment Reporting Information [Line Items]
Start-up costs	$ 2.2