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Equity and Earnings Per Share Reconciliation (Tables) | 12 Months Ended
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Dec. 31, 2012
Earnings Per Common Share Reconciliation | The table below shows earnings per common share and diluted earnings per common share and reconciles the numerator and denominator of both earnings per common share calculations.
|  | For the Year Ended December 31, |
|  | 2012 |  |  | 2011 |  |  | 2010 |
|  | (In thousands, except per share amounts) |
Earnings per common share: |  |  |  |  |  |  |  |  |  |  |  |
Net earnings |  | $ | 77,280 |  |  | $ | 81,733 |  |  | $ | 62,935 |
Less: Net earnings allocated to restricted stock |  |  | 247 |  |  |  | 292 |  |  |  | 217 |
Net earnings allocated to common shareholders (numerator) |  | $ | 77,033 |  |  | $ | 81,441 |  |  | $ | 62,718 |
Weighted average shares outstanding (denominator) |  |  | 104,419 |  |  |  | 105,143 |  |  |  | 105,880 |
Earnings per common share |  | $ | 0.74 |  |  | $ | 0.77 |  |  | $ | 0.59 |
Diluted earnings per common share: |  |  |  |  |  |  |  |  |  |  |  |
Net income allocated to common shareholders (numerator) |  | $ | 77,033 |  |  | $ | 81,441 |  |  | $ | 62,718 |
Weighted average shares outstanding |  |  | 104,419 |  |  |  | 105,143 |  |  |  | 105,880 |
Incremental shares from assumed exercise of outstanding options |  |  | 239 |  |  |  | 80 |  |  |  | 246 |
Diluted weighted average shares outstanding (denominator) |  |  | 104,658 |  |  |  | 105,223 |  |  |  | 106,126 |
Diluted earnings per common share |  | $ | 0.74 |  |  | $ | 0.77 |  |  | $ | 0.59 |

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- Definition Tabular disclosure of the reconciliation of basic net earnings per share (or unit) to diluted earnings per share (or unit). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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