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Stock-based Compensation Plans (Restricted Stock Activity Disclosure) (Details) (Restricted Stock [Member], USD $)
In Thousands, except Per Share data, unless otherwise specified |
12 Months Ended | |||
|---|---|---|---|---|
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Dec. 31, 2012
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Dec. 31, 2011
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Dec. 31, 2010
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Dec. 31, 2009
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Restricted Stock [Member]
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| Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] | ||||
| Outstanding at beginning of period | 5,539 | 5,443 | 5,593 | |
| Granted | 2,370 | 2,089 | 1,932 | |
| Vested | (1,733) | (1,701) | (1,697) | |
| Forfeited | (338) | (292) | (385) | |
| Outstanding at end of period | 5,838 | 5,539 | 5,443 | |
| Weighted-average grant date fair value of restricted stock outstanding | $ 49.98 | $ 50.38 | $ 51.30 | $ 51.78 |
| Weighted-average grant date fair value of restricted stock granted | $ 50.38 | $ 49.63 | $ 52.37 | |
| Weighted-average grant date fair value of restricted stock vested | $ 51.78 | $ 52.25 | $ 54.02 | |
| Weighted-average grant date fair value of restricted stock forfeited | $ 50.07 | $ 51.25 | $ 51.62 | |