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Earnings Per Share (Tables) | 3 Months Ended
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Mar. 31, 2014
Computation of Basic and Diluted Earnings per Share |
| Three Months Ended |
| March 31, |
(in thousands, except per share data) | 2014 |  | 2013 |
Net income attributable to common shareholders | $ | 48,684 |  |  | $ | 57,791 |  |
Average basic shares outstanding | 58,516 |  |  | 57,479 |  |
Effect of dilutive stock options | 998 |  |  | 910 |  |
Average diluted shares outstanding | 59,514 |  |  | 58,389 |  |
Earnings per basic share | $ | 0.83 |  |  | $ | 1.01 |  |
Earnings per diluted share | $ | 0.82 |  |  | $ | 0.99 |  |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
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