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Earnings Per Common Share (Tables) | 3 Months Ended
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Mar. 31, 2013
Earnings Per Share [Abstract] |
Computation Of Basic And Diluted Net Earnings Per Share | The computations of basic net earnings per share and diluted net earnings per share are as follows:
|  | Three Months Ended March 31, 2013
| Income (Numerator) |  | Shares (Denominator) |  | Per-share Amount
| Net income | $ | 14,954,000 |  |  |  |  |
| Basic earnings per common share | $ | 14,954,000 |  |  | 68,463,000 |  |  | $ | 0.22 |
| Effect of dilutive securities: |  |  |  |  |
| Stock options and restricted stock |  |  | 898,000 |  |  | — |
| Diluted earnings per common share | $ | 14,954,000 |  |  | 69,361,000 |  |  | $ | 0.22 |
|  | Three Months Ended March 31, 2012
| Income (Numerator) |  | Shares (Denominator) |  | Per-share Amount
| Net income | $ | 8,578,000 |  |  |  |  |
| Basic earnings per common share | $ | 8,578,000 |  |  | 67,084,000 |  |  | $ | 0.13 |
| Effect of dilutive securities: |  |  |  |  |
| Stock options and restricted stock |  |  | 1,001,000 |  |  | — |
| Diluted earnings per common share | $ | 8,578,000 |  |  | 68,085,000 |  |  | $ | 0.13 |

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- Definition Tabular disclosure of the numerators and the denominators of the basic and diluted per-share (or per-unit) computations for income from continuing operations, including the effect that has been given to preferred dividends. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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