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NET (LOSS) INCOME PER COMMON SHARE (Tables) | 6 Months Ended
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Jun. 30, 2015
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] | The following table is a reconciliation of net (loss) income and the shares used in calculating basic and diluted net (loss) income per common share for the three and six months ended June 30, 2015 and 2014 (in thousands, except share and per share data):
|  | Three Months Ended June 30, |  | Six Months ended June 30,
|  | 2015 |  | 2014 |  | 2015 |  | 2014
Numerator: |  |  |  |  |  |  |  |
Net (loss) income |  | $ | (11,771 | ) |  | $ | 20,422 |  |  | $ | (10,457 | ) |  | $ | 24,443 |
Denominator: |  |  |  |  |  |  |  |
Weighted average common shares outstanding – Basic |  | 46,388,218 |  |  | 46,266,142 |  |  | 45,840,599 |  |  | 46,222,146 |
Effect of dilutive shares: |  |  |  |  |  |  |  |
Common stock equivalents arising from stock options and ESPP |  | — |  |  | 249,618 |  |  | — |  |  | 262,434 |
Restricted stock awards and units and performance units |  | — |  |  | 98,966 |  |  | — |  |  | 148,402 |
Weighted average common shares outstanding – Diluted |  | 46,388,218 |  |  | 46,614,726 |  |  | 45,840,599 |  |  | 46,632,982 |
Net (loss) income per common share: |  |  |  |  |  |  |  |
Basic |  | $ | (0.25 | ) |  | $ | 0.44 |  |  | $ | (0.23 | ) |  | $ | 0.53 |
Diluted |  | $ | (0.25 | ) |  | $ | 0.44 |  |  | $ | (0.23 | ) |  | $ | 0.52 |

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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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