Long-Term Debt - Interest Expense Components (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Nov. 30, 2011
Debt Disclosure [Abstract]
Interest expense-contractual interest	$ 1.3
Interest expense-amortization of debt discount	3.5
Interest expense-amortization of deferred financing costs	$ 0.3
Effective interest rate	8.90%