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Earnings Per Share (Tables) | 12 Months Ended
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Dec. 31, 2012
Earnings Per Share [Abstract] |
Schedule Of Earnings Per Share Reconciliation | A reconciliation of the components of basic and diluted net income per common share is presented in the table below:
| 2012 |  | 2011 |  | 2010
| Income |  | Shares |  | Per Share |  | Income |  | Shares |  | Per Share |  | Income |  | Shares |  | Per Share
Basic: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income | $ | 68,371,000 |  |  | 55,933,354 |  |  | $ | 1.22 |  |  | $ | 108,422,000 |  |  | 48,754,840 |  |  | $ | 2.22 |  |  | $ | 47,363,000 |  |  | 43,863,190 |  |  | $ | 1.08 |
Effect of dilutive securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock options and awards | — |  |  | 484,134 |  |  |  |  | — |  |  | 452,123 |  |  |  |  | — |  |  | 392,902 |  |  |
Diluted: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income | $ | 68,371,000 |  |  | 56,417,488 |  |  | $ | 1.21 |  |  | $ | 108,422,000 |  |  | 49,206,963 |  |  | $ | 2.20 |  |  | $ | 47,363,000 |  |  | 44,256,092 |  |  | $ | 1.07 |

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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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