Employee Benefit and Stock Plans (Tables)

12 Months Ended

Nov. 30, 2011

Employee Benefit and Stock Plans [Abstract]

Stock option transactions

	Years Ended November 30,
	2011					2010					2009
	Options			Weighted Average Exercise Price		Options			Weighted Average Exercise Price		Options			Weighted Average Exercise Price
Options outstanding at beginning of year		8,798,613		$	24.19		5,711,701		$	27.39		7,847,402		$	30.11
Granted		1,716,000			6.36		3,572,237			18.71		1,403,141			15.44
Exercised		—			—		(28,281	)		13.00		—			—
Cancelled		(354,217	)		21.47		(457,044	)		22.05		(3,538,842	)		28.69
Options outstanding at end of year		10,160,396		$	21.27		8,798,613		$	24.19		5,711,701		$	27.39
Options exercisable at end of year		7,142,568		$	26.43		6,146,605		$	28.73		4,046,027		$	31.05
Options available for grant at end of year		2,477,219					21,703					1,714,650

Stock options outstanding and stock options exercisable

	Options Outstanding						Options Exercisable
Range of Exercise Price	Options		Weighted Average Exercise Price		Weighted Average Remaining Contractual Life		Options		Weighted Average Exercise Price		Weighted Average Remaining Contractual Life
$  6.32 to $10.54		1,699,998	$	6.38		9.8		13,998	$	9.47
$10.55 to $14.96		2,057,882		12.06		7.6		1,070,462		12.64
$14.97 to $20.08		2,220,510		17.68		7.3		1,876,102		18.09
$20.09 to $33.92		2,035,785		27.35		6.1		2,035,785		27.35
$33.93 to $69.63		2,146,221		39.85		6.4		2,146,221		39.85
$  6.32 to $69.63		10,160,396	$	21.27		7.3		7,142,568	$	26.43		6.5

Assumptions of Black-Scholes option-pricing model

	Years Ended November 30,
	2011		2010		2009
Risk-free interest rate		.9%		.7%		1.9%
Expected volatility factor		65.6%		61.7%		64.3%
Expected dividend yield		3.9%		2.2%		1.6%
Expected term		5 years		3 years		4 years

Restricted stock transactions

	Years Ended November 30,
	2011					2010
	Shares			Weighted Average per Share Grant Date Fair Value		Shares			Weighted Average per Share Grant Date Fair Value
Outstanding at beginning of year		402,477		$	15.09		445,831		$	15.44
Granted		—			—		51,023			12.58
Vested		(10,930	)		13.49		—			—
Cancelled		(52,635	)		15.44		(94,377	)		15.36
Outstanding at end of year		338,912		$	15.03		402,477		$	15.09