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

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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 Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph 64 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph f -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: 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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