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Fair Value Measurments (Quantitative Information about Unobservable Inputs) (Details)	3 Months Ended
	Feb. 28, 2014
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Liquidity risk premium	3.50%
Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Probability of earning maximum rate until maturity	0.20%
Probability of principal returned prior to maturity	75.10%
Probability of default	4.30%
Recovery rate in default	50.00%
Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Probability of earning maximum rate until maturity	10.80%
Probability of principal returned prior to maturity	94.70%
Probability of default	24.70%
Recovery rate in default	70.00%
Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Probability of earning maximum rate until maturity	1.90%
Probability of principal returned prior to maturity	86.50%
Probability of default	11.60%
Recovery rate in default	56.50%