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Significant Accounting Policies (Tables) | 6 Months Ended
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Jun. 30, 2012
Summary of Significant Accounting Policies [Abstract] |
Earnings Per Common Share Reconciliation |
|  | For the Three Months Ended June 30, |  |  | For the Six Months Ended June 30, |
|  | 2012 |  |  | 2011 |  |  | 2012 |  |  | 2011 |
|  | (In thousands, except per share amount) |
Earnings per common share |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net earnings available to common shareholders |  | $ | 23,619 |  |  | $ | 21,038 |  |  | $ | 45,887 |  |  | $ | 37,638 |
Less: Net earnings allocated to restricted stock |  |  | 82 |  |  |  | 82 |  |  |  | 149 |  |  |  | 148 |
Net earnings allocated to common shareholders (numerator) |  | $ | 23,537 |  |  | $ | 20,956 |  |  | $ | 45,738 |  |  |  | 37,490 |
Weighted Average Shares Outstanding (denominator) |  |  | 104,378 |  |  |  | 105,659 |  |  |  | 104,341 |  |  |  | 105,655 |
Earnings per common share |  | $ | 0.23 |  |  | $ | 0.20 |  |  | $ | 0.44 |  |  |  | 0.35 |
Diluted earnings per common share |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income allocated to common shareholders (numerator) |  | $ | 23,537 |  |  | $ | 20,956 |  |  | $ | 45,738 |  |  | $ | 37,490 |
Weighted Average Shares Outstanding |  |  | 104,378 |  |  |  | 105,659 |  |  |  | 104,341 |  |  |  | 105,655 |
Incremental shares from assumed exercise of outstanding options |  |  | 240 |  |  |  | 105 |  |  |  | 221 |  |  |  | 79 |
Diluted Weighted Average Shares Outstanding (denominator) |  |  | 104,618 |  |  |  | 105,764 |  |  |  | 104,562 |  |  |  | 105,734 |
Diluted earnings per common share |  | $ | 0.23 |  |  | $ | 0.20 |  |  | $ | 0.44 |  |  |  | 0.35 |

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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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