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Summary of Significant Accounting Policies (Tables) | 3 Months Ended
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Mar. 31, 2012
Summary of Significant Accounting Policies [Abstract] |
Earnings Per Common Share Reconciliation |
|  | For the Three Months Ended March 31, |
|  | 2012 |  |  | 2011 |
|  | (In thousands, except per share amount) |
Earnings per common share |  |  |  |  |  |  |  |
Net earnings available to common shareholders |  | $ | 22,268 |  |  | $ | 16,600 |
Less: Net earnings allocated to restricted stock |  |  | 72 |  |  |  | 66 |
Net earnings allocated to common shareholders (numerator) |  | $ | 22,196 |  |  |  | 16,534 |
Weighted Average Shares Outstanding (denominator) |  |  | 104,303 |  |  |  | 105,651 |
Earnings per common share |  | $ | 0.21 |  |  |  | 0.16 |
Diluted earnings per common share |  |  |  |  |  |  |  |
Net income allocated to common shareholders (numerator) |  | $ | 22,196 |  |  | $ | 16,534 |
Weighted Average Shares Outstanding |  |  | 104,303 |  |  |  | 105,651 |
Incremental shares from assumed exercise of outstanding options |  |  | 197 |  |  |  | 53 |
Diluted Weighted Average Shares Outstanding (denominator) |  |  | 104,500 |  |  |  | 105,704 |
Diluted earnings per common share |  | $ | 0.21 |  |  |  | 0.16 |

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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 -Topic 260 -SubTopic 10 -Publisher FASB -Number -Article -Subparagraph -Name Accounting Standards Codification -Paragraph 1 -Section 50 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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