Long-Term Debt - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended				9 Months Ended			9 Months Ended			9 Months Ended			0 Months Ended
	Nov. 30, 2013	Nov. 30, 2012	Nov. 30, 2013	Nov. 30, 2012	Feb. 28, 2013	May 30, 2012	Nov. 30, 2013 2012 Credit Agreement	Dec. 28, 2012 2012 Credit Agreement	Nov. 30, 2013 2012 Credit Agreement Minimum	Nov. 30, 2013 2012 Credit Agreement Maximum	Nov. 30, 2013 2012 Credit Agreement Term Loan	Dec. 28, 2012 2012 Credit Agreement Term Loan	Nov. 30, 2013 2012 Credit Agreement Revolver	Dec. 28, 2012 2012 Credit Agreement Revolver	Dec. 28, 2012 2012 Credit Agreement Letter of Credit	Aug. 09, 2013 First Amendment to Credit Agreement Maximum
Debt Instrument [Line Items]
Maximum borrowing capacity under credit facility								$ 100,000,000				$ 80,000,000		$ 20,000,000	$ 5,000,000
Credit agreement bear interest rate									2.50%	5.00%
Period after closing to begin maintaining fixed rates										60 days
Minimum period to maintain fix rates							1 year
Minimum fixed interest rates for at least one year							50.00%
Debt instrument maturity date											Dec. 28, 2017		Dec. 28, 2017
Loan repayment commencement date													Apr. 01, 2013
Quarterly payment of term loan percentage											2.50%
Transaction fees related to the issuance of note							500,000
Original issue discount of issuance of debt	1,570,000		1,570,000		2,448,000		1,600,000	2,500,000
First amendment total costs																100,000
Loss on debt extinguishment	(653,000)	(56,000)	(653,000)	(1,141,000)
Write off of deferred debt issuance cost			100,000
Write off of unamortized debt discount			600,000
Principal amount of nonrecourse notes issued						$ 82,200,000
Interest rate during period						4.10%