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NET INCOME (LOSS) PER SHARE OF COMMON STOCK (Tables) | 9 Months Ended
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Sep. 30, 2013
Earnings Per Share [Abstract] |
Calculation of Numerator and Denominator in Earnings Per Share | Diluted net income (loss) per share is computed based on the weighted average number of shares of common stock outstanding during each period, plus dilutive potential shares of common stock considered outstanding during the period, in accordance with FASB ASC No. 260, “Earnings Per Share.”
|  | Nine months ended September 30, |  |  | Three months ended September 30, |
|  | 2013 |  |  | 2012 |  |  | 2013 |  |  | 2012 |
|  | (unaudited) |  |  | (unaudited) |  |  | (unaudited) |  |  | (unaudited) |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) |  | $ | 3,557 |  |  | $ | 10,930 |  |  | $ | (323 | ) |  | $ | 2,594 |
Denominator (in thousands): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted-average common stock outstanding |  |  | 22,118 |  |  |  | 22,965 |  |  |  | 22,072 |  |  |  | 22,526 |
Effect of stock options and stock appreciation rights |  |  | 483 |  |  |  | 600 |  |  |  | — |  |  |  | 493 |
Diluted weighted average common stock outstanding |  |  | 22,601 |  |  |  | 23,565 |  |  |  | 22,072 |  |  |  | 23,019 |
Basic net income (loss) per share |  | $ | 0.16 |  |  | $ | 0.48 |  |  | $ | (0.01 | ) |  | $ | 0.12 |
Diluted net income (loss) per share |  | $ | 0.16 |  |  | $ | 0.46 |  |  | $ | (0.01 | ) |  | $ | 0.11 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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