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NET INCOME PER SHARE | 9 Months Ended
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Sep. 30, 2016
NET INCOME PER SHARE [Abstract] |
NET INCOME PER SHARE | (14)NET INCOME PER SHARE The following table sets forth the computation of basic and diluted shares for the periods indicated (in thousands):
|  | Three Months Ended September 30, |  | Nine Months Ended September 30,
|  | 2016 |  | 2015 |  | 2016 |  | 2015
Shares used in basic earnings per share calculation |  | 47,081 |  | 48,345 |  | 47,771 |  | 48,346
Effect of dilutive securities: |  |  |  |  |  |  |  |
Stock options |  | 6 |  | 278 |  | 11 |  | 355
Restricted stock units |  | 214 |  | 291 |  | 292 |  | 332
Performance-based restricted stock units |  | 14 |  | 22 |  | 15 |  | 19
Total effects of dilutive securities |  | 234 |  | 591 |  | 318 |  | 706
Shares used in dilutive earnings per share calculation |  | 47,315 |  | 48,936 |  | 48,089 |  | 49,052
For the three months ended September 30, 2016 and 2015, options to purchase 0.1 million and 0.1 million shares of common stock, respectively, were outstanding, but not included in the computation of diluted net income per share because the exercise price exceeded the value of the shares and the effect would have been anti-dilutive. For the nine months ended September 30, 2016 and 2015, options to purchase 0.1 million and 0.1 million shares of common stock, respectively, were outstanding, but not included in the computation of diluted net income per share because the exercise price exceeded the value of the shares and the effect would have been anti-dilutive. For the three months ended September 30, 2016 and 2015, restricted stock units (“RSUs”) of 0.1 million and 0.2 million, respectively, were outstanding, but not included in the computation of diluted net income per share because the effect would have been anti-dilutive. For the nine months ended September 30, 2016 and 2015, RSUs of 0.1 million and 0.4 million, respectively, were outstanding, but not included in the computation of diluted net income per share because the effect would have been anti-dilutive.

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