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Earnings per Share | 3 Months Ended
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Mar. 29, 2013
Earnings per Share | 5. Earnings per Share Basic earnings per common share is computed by dividing net income by the weighted average number of common shares outstanding during the period. For diluted earnings per common share, the denominator also includes the dilutive effect of outstanding restricted stock units determined using the treasury stock method. For periods in which net losses are generated the dilutive potential common shares are excluded from the calculation of diluted earnings per share as the effect would be anti-dilutive. The following table sets forth the computation of basic and diluted earnings per share (in thousands, except per share amounts):
|  | Three Months Ended |
|  | March 29, 2013 |  |  | March 30, 2012 |
Numerators: |  |  |  |  |  |  |  |
Amounts attributable to GSI Group Inc: |  |  |  |  |  |  |  |
Income from continuing operations |  | $ | 1,433 |  |  | $ | 1,059 |
Income from discontinued operations. |  |  | 649 |  |  |  | 322 |
Net income attributable to GSI Group Inc. |  | $ | 2,082 |  |  | $ | 1,381 |
Denominators: |  |  |  |  |  |  |  |
Weighted average common shares outstanding - basic |  |  | 33,983 |  |  |  | 33,679 |
Dilutive potential common shares |  |  | 288 |  |  |  | 199 |
Weighted average common shares outstanding - diluted |  |  | 34,271 |  |  |  | 33,878 |
Antidilutive common shares excluded from above |  |  | 373 |  |  |  | — |
Basic Earnings per Common Share: |  |  |  |  |  |  |  |
From continuing operations |  | $ | 0.04 |  |  | $ | 0.03 |
From discontinued operations |  | $ | 0.02 |  |  | $ | 0.01 |
Basic earnings per share attributable to GSI Group Inc. |  | $ | 0.06 |  |  | $ | 0.04 |
Diluted Earnings per Common Share: |  |  |  |  |  |  |  |
From continuing operations |  | $ | 0.04 |  |  | $ | 0.03 |
From discontinued operations |  | $ | 0.02 |  |  | $ | 0.01 |
Diluted earnings per share attributable to GSI Group Inc. |  | $ | 0.06 |  |  | $ | 0.04 |

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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 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1252-109256 Reference 2: 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=16381557&loc=d3e4984-109258 Reference 3: 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 4: 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 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 40 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 6: 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=6880815&loc=d3e20235-122688 + Details
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