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Income Taxes - Income Tax Expense from Corporation's Continuing Operations (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Feb. 28, 2015	Feb. 28, 2014	Feb. 28, 2013
Current:
Federal	$ 61,049us-gaap_CurrentFederalTaxExpenseBenefit	$ 26,018us-gaap_CurrentFederalTaxExpenseBenefit	$ 6,007us-gaap_CurrentFederalTaxExpenseBenefit
International	(58)us-gaap_CurrentForeignTaxExpenseBenefit	8,027us-gaap_CurrentForeignTaxExpenseBenefit	839us-gaap_CurrentForeignTaxExpenseBenefit
State and local	5,965	6,044	1,620
Current, Total	66,956us-gaap_CurrentIncomeTaxExpenseBenefit	40,089us-gaap_CurrentIncomeTaxExpenseBenefit	8,466us-gaap_CurrentIncomeTaxExpenseBenefit
Deferred	(21,357)us-gaap_DeferredIncomeTaxExpenseBenefit	22,615us-gaap_DeferredIncomeTaxExpenseBenefit	27,530us-gaap_DeferredIncomeTaxExpenseBenefit
Income tax expense	$ 45,599us-gaap_IncomeTaxExpenseBenefit	$ 62,704us-gaap_IncomeTaxExpenseBenefit	$ 35,996us-gaap_IncomeTaxExpenseBenefit

Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of current income tax expense (benefit) pertaining to taxable income (loss) from continuing operations.

Amount of current state and local tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.