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Earnings Per Share | 6 Months Ended
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Jun. 30, 2013
Earnings Per Share [Abstract] |
Earnings Per Share | 9. Earnings Per Share Basic earnings (loss) per share is computed on the basis of weighted average outstanding common shares. Diluted earnings (loss) per share is computed on the basis of basic weighted average outstanding common shares adjusted for the dilutive effect of stock options and other outstanding dilutive securities. The following table reconciles the average share amounts used to compute both basic and diluted earnings (loss) per share (in thousands):
|  | Three Months Ended June 30, |  |  | Six Months Ended June 30, |
|  | 2013 |  |  | 2012 |  |  | 2013 |  |  | 2012 |
Weighted average share outstanding: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic weighted average shares outstanding |  |  | 39,835 |  |  |  | 39,263 |  |  |  | 39,594 |  |  |  | 37,985 |
Add: Dilutive effect of stock options, restricted stock awards and common stock warrants |  |  | 666 |  |  |  | — |  |  |  | — |  |  |  | — |
Diluted weighted average shares outstanding |  |  | 40,501 |  |  |  | 39,263 |  |  |  | 39,594 |  |  |  | 37,985 |
The diluted earnings (loss) per share computation excludes 1.6 million and 3.7 million options to purchase shares, restricted share awards, and contingently issuable shares during the three and six months ended June 30, 2013, respectively, as their effect would be anti-dilutive. The diluted earnings (loss) per share computation excludes 6.7 million and 6.9 million options to purchase shares, restricted share awards, common stock warrants and contingently issuable shares during the three and six months ended June 30, 2012, respectively, as their effect would be anti-dilutive. Common stock outstanding as of June 30, 2013 and December 31, 2012 was 39,568,183 and 39,447,773, respectively.

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- Definition The entire disclosure for earnings per share. + 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1278-109256 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1252-109256 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 55 -Paragraph 52 -URI http://asc.fasb.org/extlink&oid=32703322&loc=d3e4984-109258 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.21) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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