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NET INCOME PER SHARE (Tables) | 9 Months Ended
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Sep. 30, 2013
Earnings Per Share [Abstract] |
Computation of Basic and Diluted Net Income (Loss) Per Share | The computation of basic and diluted net income per share is determined using net income applicable to common stockholders as the numerator and the number of shares included in the denominator as follows (in thousands, except per share amounts):
|  | Three Months Ended September 30, |  | Nine Months Ended September 30, |
|  | 2013 |  | 2012 |  | 2013 |  | 2012 |
Basic net income per share: |  |  |  |  |  |  |  |  |  |  |  |  |
Net income applicable to common stockholders |  | $ | 16,236 |  | $ | 18,441 |  | $ | 36,106 |  | $ | 25,447 |
Undistributed earnings allocated to participating securities |  |  | (117) |  |  | (166) |  |  | (293) |  |  | (218) |
Net income applicable to common stockholders excluding amounts applicable to participating securities |  | $ | 16,119 |  | $ | 18,275 |  | $ | 35,813 |  | $ | 25,229 |
Weighted average common shares outstanding |  |  | 68,487 |  |  | 68,357 |  |  | 68,442 |  |  | 68,308 |
Basic net income per share |  | $ | 0.24 |  | $ | 0.27 |  | $ | 0.52 |  | $ | 0.37 |
Diluted net income per share: |  |  |  |  |  |  |  |  |  |  |  |  |
Net income applicable to common stockholders |  | $ | 16,236 |  | $ | 18,441 |  | $ | 36,106 |  | $ | 25,447 |
Undistributed earnings allocated to participating securities |  |  | (117) |  |  | (166) |  |  | (293) |  |  | (218) |
Net income applicable to common stockholders excluding amounts applicable to participating securities |  | $ | 16,119 |  | $ | 18,275 |  | $ | 35,813 |  | $ | 25,229 |
Weighted average common shares outstanding |  |  | 68,487 |  |  | 68,357 |  |  | 68,442 |  |  | 68,308 |
Dilutive stock options and restricted stock |  |  | 524 |  |  | 159 |  |  | 458 |  |  | 234 |
Diluted weighted average common shares outstanding |  |  | 69,011 |  |  | 68,516 |  |  | 68,900 |  |  | 68,542 |
Diluted net income per share |  | $ | 0.23 |  | $ | 0.27 |  | $ | 0.52 |  | $ | 0.37 |

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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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