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Share-Based Compensation (Tables) | 6 Months Ended
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Jun. 30, 2012
Share-based Compensation [Abstract] |
Schedule Of Share Based Compensation Shares Authorized Under Stock Option Plans By Exercise Price Range And Intrinsic Value | The following table summarizes outstanding share options and exercisable options at June 30, 2012:
| Outstanding Options (1) |  | Exercisable Options (1)
Range of Exercise Prices | Number |  | Weighted Average Price |  | Number |  | Weighted Average Price
$30.06-$31.48 | 334,036 |  |  | $ | 30.09 |  |  | 138,229 |  |  | $ | 30.13 |
$41.16-$43.94 | 259,632 |  |  | 42.72 |  |  | 241,000 |  |  | 42.63 |
$45.53-$73.32 | 381,893 |  |  | 49.05 |  |  | 308,784 |  |  | 49.29 |
Total options | 975,561 |  |  | $ | 40.87 |  |  | 688,013 |  |  | $ | 43.11 |
(1) | The aggregate intrinsic value of outstanding and exercisable options at June 30, 2012 were $26.3 million and $17.0 million, respectively. The aggregate intrinsic values were calculated as the excess, if any, between our closing share price of $67.67 per share on June 30, 2012 and the strike price of the underlying award.
Summary Of Share Incentive Plans | The following table summarizes activity under our share incentive plans for the six months ended June 30, 2012:
| Options Outstanding |  | Weighted Average Exercise / Grant Price |  | Nonvested Share Awards Outstanding |  | Weighted Average Exercise / Grant Price
Total options and nonvested share awards outstanding at December 31, 2011 | 1,339,536 |  |  | $ | 42.27 |  |  | 818,754 |  |  | $ | 46.88 |
Granted | — |  |  | — |  |  | 343,080 |  |  | 63.46 |
Exercised/vested | (332,032 | ) |  | 44.61 |  |  | (274,121 | ) |  | 48.71 |
Forfeited | (31,943 | ) |  | 60.56 |  |  | (7,867 | ) |  | 50.16 |
Net activity | (363,975 | ) |  |  |  | 61,092 |  |  |
Total options and nonvested share awards outstanding at June 30, 2012 | 975,561 |  |  | $ | 40.87 |  |  | 879,846 |  |  | $ | 52.75 |

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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 aggregate intrinsic value. + References No definition available. + Details
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- Definition Tabular disclosure of share-based compensation plans that may be presented in a single table for outstanding, vested and expected to vest, and exercisable awards. The information that may be disclosed in this table may include, but is not limited to, number of shares, weighted average exercise price, weighted average remaining contractual life, and aggregate intrinsic value. + References No definition available. + Details
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- Details
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