Income Tax - Additional Information (Detail) (USD $)	12 Months Ended
	Feb. 28, 2014	Feb. 28, 2013
Deferred Tax Assets And Liabilities [Line Items]
Decrease in valuation allowance	$ 39,900,000
Valuation allowance	970,000	40,863,000
Unrealized benefit related to share-based compensation	1,400,000
Tax credits related to alternative minimum tax carryforwards	1,900,000
Amount recognized is measured as the largest benefit	50.00%
Uncertain tax positions	200,000
Unrecognized tax benefits that would reduce, if recognized, provision for income taxes	200,000	700,000
Interest accrued related to unrecognized tax benefits	2,000
Federal
Deferred Tax Assets And Liabilities [Line Items]
Net operating loss carryforward	62,000,000
State and Local Jurisdiction
Deferred Tax Assets And Liabilities [Line Items]
Net operating loss carryforward	$ 164,000,000