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Net Income (Loss) Per Share | 6 Months Ended
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Jun. 30, 2013
Earnings Per Share [Abstract] |
Earnings Per Share [Text Block] |
(6) Net Income (Loss) Per Share Basic net income (loss) per share was computed by dividing net income (loss) by the weighted average number of Common Shares outstanding for each respective period. Diluted net income per share was calculated by dividing net income attributable to Stoneridge, Inc. by the weighted-average of all potentially dilutive Common Shares that were outstanding during the periods presented. For all periods in which the Company recognized a net loss, the Company has recognized zero dilutive effect from securities as anti-dilution is not permitted. Actual weighted-average Common Shares outstanding used in calculating basic and diluted net income per share were as follows:
|  | Three months ended |  | Six months ended |
|  | June 30, |  | June 30, |
|  | 2013 |  | 2012 |  | 2013 |  | 2012 |
Basic weighted-average shares outstanding |  |  | 26,691,895 |  |  | 26,424,331 |  |  | 26,649,005 |  |  | 26,322,277 |
Effect of dilutive shares |  |  | 656,444 |  |  | - |  |  | 709,435 |  |  | 676,225 |
Diluted weighted-average shares outstanding |  |  | 27,348,339 |  |  | 26,424,331 |  |  | 27,358,440 |  |  | 26,998,502 |
Options not included in the computation of diluted net income per share to purchase 20,000 and 65,000 Common Shares at an average price of $15.73 and $12.03 per share were outstanding at June 30, 2013 and 2012, respectively. These outstanding options were not included in the computation of diluted net income per share because their respective exercise prices were greater than the average closing market price of Company Common Shares . There were 663,750 and 696,300 performance-based restricted Common Shares outstanding at June 30, 2013 and 2012, respectively. Substantially all of these performance-based restricted Common Shares were not included in the computation of diluted net income per share because all vesting conditions have not and are not expected to be achieved as of June 30, 2013 and 2012. These performance-based restricted Common Shares may or may not become dilutive based on the Company's ability to meet or exceed future earnings performance targets.

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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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