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Stock Based Compensation Plans (Details) (USD $)
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3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
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Apr. 30, 2013
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Apr. 30, 2012
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Apr. 30, 2013
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Apr. 30, 2012
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| Stock-based compensation expense: | ||||
| Stock options (under the 2008 Plan) | $ 3,677,000 | $ 6,260,000 | $ 7,525,000 | $ 15,443,000 |
| Restricted shares (under the 2008 Plan) | 8,008,000 | 5,892,000 | 16,437,000 | 12,007,000 |
| Phantom stock units (under the 2008 Plan) | 129,000 | 69,000 | 273,000 | 124,000 |
| Employee stock purchase plan | 0 | 0 | 376,000 | 108,000 |
| Incentive Plan - Stock Alternative Expense | 2,000 | 0 | 198,000 | 126,000 |
| Atlanta Capital Plan | 352,000 | 232,000 | 703,000 | 463,000 |
| Parametric Plan | 822,000 | 594,000 | 1,645,000 | 1,173,000 |
| Total stock-based compensation expense | 12,990,000 | 13,047,000 | 27,157,000 | 29,444,000 |
| Tax benefits expected to be realized for tax deductions from option exercises | $ 5,000,000 | $ 4,000,000 | $ 10,500,000 | $ 9,200,000 |