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Unaudited Quarterly Financial Data | 12 Months Ended
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Dec. 31, 2013
Unaudited Quarterly Financial Data [Abstract] |
Unaudited Quarterly Financial Data | 13. Unaudited Quarterly Financial Data The following is a summary of quarterly results of operations:
|  |  |  |  |  |  | Quarter ended
2013 |  | December 31 |  | September 30 |  | June 30 |  | March 31
Net sales | $ | 235,824 | $ | 233,511 | $ | 242,785 | $ | 235,710
Gross profit |  | 53,553 |  | 53,519 |  | 60,220 |  | 58,729
Operating income |  | 6,882 |  | 10,705 |  | 11,825 |  | 10,292
Provision for income taxes |  | 1,066 |  | 1,016 |  | 1,125 |  | 1,019
Net income |  | 321 |  | 5,513 |  | 6,391 |  | 4,283
Net income attributable to noncontrolling interests |  | 117 |  | 466 |  | 634 |  | 160
Net income attributable to Stoneridge, Inc. |  | 204 |  | 5,047 |  | 5,757 |  | 4,123
Earnings per share attributable to Stoneridge, Inc.: |  |  |  |  |  |  |  |
Basic (A) |  | 0.01 |  | 0.19 |  | 0.22 |  | 0.15
Diluted (A) |  | 0.01 |  | 0.19 |  | 0.21 |  | 0.15
|  |  |  |  |  |  | Quarter ended
2012 |  | December 31 |  | September 30 |  | June 30 |  | March 31
Net sales | $ | 222,725 | $ | 219,256 | $ | 234,265 | $ | 262,267
Gross profit |  | 54,609 |  | 51,238 |  | 53,659 |  | 65,138
Operating income |  | 8,648 |  | 6,615 |  | 1,617 |  | 11,849
Provision (benefit) for income taxes |  | 95 |  | 383 |  | (884) |  | 1,218
Net income (loss) |  | 2,711 |  | 589 |  | (5,298) |  | 5,746
Net income (loss) attributable to noncontrolling interests |  | 90 |  | 170 |  | (1,740) |  | (133)
Net income (loss) attributable to Stoneridge, Inc. |  | 2,621 |  | 419 |  | (3,558) |  | 5,879
Earnings per share attributable to Stoneridge, Inc.: |  |  |  |  |  |  |  |
Basic (A) |  | 0.10 |  | 0.02 |  | (0.13) |  | 0.22
Diluted (A) |  | 0.10 |  | 0.02 |  | (0.13) |  | 0.22
| (A) |  | Earnings per share for the year may not equal the sum of the four historical quarters earnings per share due to changes in weighted-average basic and diluted shares outstanding.

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- Definition The entire disclosure for the quarterly financial data in the annual financial statements. The disclosure may include a tabular presentation of financial information for each fiscal quarter for the current and previous year, including revenues, gross profit, income or loss before extraordinary items and earnings per share data. It also includes an indication if the information in the note is unaudited, comments on the aggregate effect of year-end adjustments, and an explanation of matters or transactions that affect comparability or are pertinent to an understanding of the information furnished. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6372559&loc=d3e765-108305 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6372559&loc=d3e725-108305 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a)-(j) -URI http://asc.fasb.org/extlink&oid=25249566&loc=d3e1280-108306 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section G -Subsection 1 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 302 -Paragraph a + Details
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