Stock-Based Compensation (Tables)

9 Months Ended

Aug. 31, 2011

Stock-Based Compensation [Abstract]

Stock options outstanding and stock options exercisable

				Weighted
				Average Exercise
	Options			Price
Options outstanding at beginning of period		8,798,613		$	24.19
Granted		20,000			9.54
Exercised		—			—
Cancelled		(275,363	)		21.44
Options outstanding at end of period		8,543,250			24.24
Options exercisable at end of period		6,123,062			28.46