Employee Benefit and Stock Plans (Tables)

12 Months Ended

Nov. 30, 2013

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Share Based Payments Performance Shares Activity [Table Text Block]

PSU transactions are summarized as follows:

	Years Ended November 30,
	2013			2012
	Shares	Weighted Average per Share Grant Date Fair Value		Shares	Weighted Average per Share Grant Date Fair Value
Outstanding at beginning of year	227,049	$	16.23	—	$	—
Granted	158,000	16.63		227,049	16.23
Vested	—	—		—	—
Cancelled	—	—		—	—
Outstanding at end of year	385,049	$	16.39	227,049	$	16.23

Stock option transactions

Stock option transactions are summarized as follows:

	Years Ended November 30,
	2013				2012				2011
	Options		Weighted Average Exercise Price		Options		Weighted Average Exercise Price		Options		Weighted Average Exercise Price
Options outstanding at beginning of year	10,105,546		$	21.27	10,160,396		$	21.27	8,798,613		$	24.19
Granted	550,000		16.63		30,000		9.08		1,716,000		6.36
Exercised	(118,208	)	13.46		(7,494	)	13.93		—		—
Cancelled	(5,400	)	24.24		(77,356	)	17.96		(354,217	)	21.47
Options outstanding at end of year	10,531,938		$	21.11	10,105,546		$	21.27	10,160,396		$	21.27
Options exercisable at end of year	9,414,935		$	22.26	8,533,224		$	23.76	7,142,568		$	26.43
Options available for grant at end of year	746,043				1,721,847				2,477,219

Stock options outstanding and stock options exercisable

Stock options outstanding and stock options exercisable at November 30, 2013 are as follows:

	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	1,693,165	$	6.43	7.8	1,126,162	$	6.42
$10.55 to $14.96	1,968,424	12.09		5.6	1,968,424	12.09
$14.97 to $20.08	2,717,523	17.47		6.2	2,167,523	17.68
$20.09 to $33.92	2,019,721	27.36		4.1	2,019,721	27.36
$33.93 to $69.63	2,133,105	39.81		4.4	2,133,105	39.81
$  6.32 to $69.63	10,531,938	$	21.11	5.6	9,414,935	$	22.26	5.2

Assumptions of Black-Scholes option-pricing model

The fair value of each stock option grant is estimated on the date of grant using the Black-Scholes option-pricing model with the following assumptions:

	Years Ended November 30,
	2013		2012		2011
Risk-free interest rate	1.3	%	.7	%	.9	%
Expected volatility factor	52.3	%	65.6	%	65.6	%
Expected dividend yield	.6	%	1.9	%	3.9	%
Expected term	5 years		5 years		5 years

Restricted stock transactions

Restricted stock transactions are summarized as follows:

	Years Ended November 30,
	2013				2012				2011
	Shares		Weighted Average per Share Grant Date Fair Value		Shares		Weighted Average per Share Grant Date Fair Value		Shares		Weighted Average per Share Grant Date Fair Value
Outstanding at beginning of year	229,724		$	15.81	338,912		$	15.03	402,477		$	15.09
Granted	88,000		17.50		207,617		16.23		—		—
Vested	(91,312	)	15.18		(176,135	)	14.25		(10,930	)	13.49
Cancelled	(6,784	)	17.24		(140,670	)	15.44		(52,635	)	15.44
Outstanding at end of year	219,628		$	16.23	229,724		$	15.81	338,912		$	15.03