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Basis of Presentation (Tables) | 6 Months Ended
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Jun. 30, 2011
Basis of Presentation |
Reconciliation of basic weighted average shares outstanding and diluted weighted average shares outstanding |
|  | Three months ended |  | Six months ended |
|  | June 30, |  | June 30, |
|  | 2011 |  | 2010 |  | 2011 |  | 2010 |
Basic weighted average shares outstanding |  | 40,998 |  | 39,761 |  | 40,433 |  | 39,283 |
Dilutive effect of stock options and restricted stock |  | 1,066 |  | 2,327 |  | 1,108 |  | 1,215 |
Dilutive effect of convertible notes |  | 938 |  | 1,418 |  | 1,239 |  | 1,185 |
Diluted weighted average shares outstanding |  | 43,002 |  | 43,506 |  | 42,780 |  | 41,683 |

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- Definition Tabular disclosure of the weighted average number of shares used in calculating basic net earnings per share (or unit) and 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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