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Income Taxes - Components of Provision for Income Taxes (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Feb. 28, 2015	Feb. 28, 2014	Feb. 28, 2013
Current:
Federal	$ 14,006us-gaap_CurrentFederalTaxExpenseBenefit	$ 17,755us-gaap_CurrentFederalTaxExpenseBenefit	$ 10,316us-gaap_CurrentFederalTaxExpenseBenefit
State and local	2,451us-gaap_CurrentStateAndLocalTaxExpenseBenefit	2,946us-gaap_CurrentStateAndLocalTaxExpenseBenefit	2,205us-gaap_CurrentStateAndLocalTaxExpenseBenefit
Foreign	322us-gaap_CurrentForeignTaxExpenseBenefit	183us-gaap_CurrentForeignTaxExpenseBenefit	168us-gaap_CurrentForeignTaxExpenseBenefit
Total current	16,779us-gaap_CurrentIncomeTaxExpenseBenefit	20,884us-gaap_CurrentIncomeTaxExpenseBenefit	12,689us-gaap_CurrentIncomeTaxExpenseBenefit
Deferred:
Federal	(9,920)us-gaap_DeferredFederalIncomeTaxExpenseBenefit	(1,550)us-gaap_DeferredFederalIncomeTaxExpenseBenefit	803us-gaap_DeferredFederalIncomeTaxExpenseBenefit
State and local	(1,459)us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit	(731)us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit	411us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit
Total deferred	(11,379)us-gaap_DeferredIncomeTaxExpenseBenefit	(2,281)us-gaap_DeferredIncomeTaxExpenseBenefit	1,214us-gaap_DeferredIncomeTaxExpenseBenefit
Total provision for income taxes	$ 5,400us-gaap_IncomeTaxExpenseBenefit	$ 18,603us-gaap_IncomeTaxExpenseBenefit	$ 13,903us-gaap_IncomeTaxExpenseBenefit

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