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Quarterly Financial Information (unaudited) (Tables) | 12 Months Ended
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Dec. 31, 2013
Quarterly Financial Information Disclosure [Abstract] |
Quarterly Results of Operations | The following table summarizes our quarterly results of operations for each of the quarters in 2013 and 2012.
|  | Quarter ended |
|  | March 31 |  |  | June 30 |  |  | September 30 |  |  | December 31 |
2013 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  | $ | 98,689 |  |  | $ | 111,716 |  |  | $ | 100,828 |  |  | $ | 98,543 |
Gross profit |  |  | 31,299 |  |  |  | 37,549 |  |  |  | 31,660 |  |  |  | 30,393 |
Income before income taxes |  |  | 6,917 |  |  |  | 10,680 |  |  |  | 8,544 |  |  |  | 5,653 |
Net income |  |  | 4,965 |  |  |  | 6,386 |  |  |  | 6,104 |  |  |  | 3,132 |
Net income, basic |  | $ | 0.92 |  |  | $ | 1.19 |  |  | $ | 1.14 |  |  | $ | 0.59 |
Net income, diluted |  | $ | 0.91 |  |  | $ | 1.17 |  |  | $ | 1.12 |  |  | $ | 0.58 |
2012 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  | $ | 108,846 |  |  | $ | 111,940 |  |  | $ | 114,206 |  |  | $ | 104,200 |
Gross profit |  |  | 36,012 |  |  |  | 36,966 |  |  |  | 38,507 |  |  |  | 32,953 |
Income before income taxes |  |  | 12,191 |  |  |  | 9,913 |  |  |  | 13,410 |  |  |  | 9,313 |
Net income |  |  | 8,133 |  |  |  | 6,596 |  |  |  | 9,284 |  |  |  | 5,273 |
Net income, basic |  | $ | 1.52 |  |  | $ | 1.24 |  |  | $ | 1.75 |  |  | $ | 0.99 |
Net income, diluted |  | $ | 1.50 |  |  | $ | 1.21 |  |  | $ | 1.71 |  |  | $ | 0.98 |

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- Definition Tabular disclosure of the quarterly financial data in the annual financial statements. The disclosure includes financial information for each fiscal quarter for the current and previous year, including revenues, gross profit, income (loss) before extraordinary items and cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: 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 + Details
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