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Basis of Presentation (Tables) | 6 Months Ended
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Jun. 30, 2012
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, |
|  | 2012 |  | 2011 |  | 2012 |  | 2011 |
Basic weighted average shares outstanding |  | 38,370 |  | 40,998 |  | 38,315 |  | 40,433 |
Dilutive effect of stock options and restricted stock |  | 618 |  | 1,066 |  | 610 |  | 1,108 |
Dilutive effect of convertible notes |  | — |  | 938 |  | — |  | 1,239 |
Diluted weighted average shares outstanding |  | 38,988 |  | 43,002 |  | 38,925 |  | 42,780 |

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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 -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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