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Employee Benefit and Stock Plans (Tables) | 12 Months Ended
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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 |

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- Definition Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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