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Fair Value Measurements (Quantitative Information about Unobservable Inputs, Liabilities) (Details) (Contingent Consideration [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
	May 31, 2013	May 31, 2013
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Contingent consideration, discount rate		4.80%
Change in fair value of contingent consideration liability	$ 0
Minimum [Member]
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Probability milestones associated with contingent consideration will be achieved		95.00%

Amount of increase (decrease) of liabilities measured at fair value on a recurring basis using unobservable inputs (level 3) which have taken place during the period. Such increase (decrease) may be comprised of changes in fair value (gains or losses) whether realized or unrealized that have been included in earnings, changed net asset value, or other comprehensive income (a separate component of shareholders' equity); purchases, sales, issues, or settlements of assets; and net transfers in to or out of this category within the fair value hierarchy.

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