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Net Income Per Share | 6 Months Ended
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Jun. 30, 2013
Earnings Per Share [Abstract] |
Net Income Per Share |
14) |  | Net Income Per Share
The following table sets forth the computation of basic and diluted net income per share:
|  | Three Months Ended June 30, |  |  | Six Months Ended June 30, |
|  | 2013 |  |  | 2012 |  |  | 2013 |  |  | 2012 |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income |  | $ | 7,320 |  |  | $ | 18,572 |  |  | $ | 13,081 |  |  | $ | 41,340 |
Denominator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares used in net income per common share – basic |  |  | 53,054,000 |  |  |  | 52,679,000 |  |  |  | 52,914,000 |  |  |  | 52,591,000 |
Effect of dilutive securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock options, restricted stock and employee stock purchase plan |  |  | 304,000 |  |  |  | 527,000 |  |  |  | 445,000 |  |  |  | 623,000 |
Shares used in net income per common share – diluted |  |  | 53,358,000 |  |  |  | 53,206,000 |  |  |  | 53,359,000 |  |  |  | 53,214,000 |
Net income per common share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | 0.14 |  |  | $ | 0.35 |  |  | $ | 0.25 |  |  | $ | 0.79 |
Diluted |  | $ | 0.14 |  |  | $ | 0.35 |  |  | $ | 0.25 |  |  | $ | 0.78 |
Basic earnings per share (“EPS”) is computed by dividing income available to common stockholders by the weighted-average number of common shares outstanding during the period. The computation of diluted EPS is similar to the computation of basic EPS except that the denominator is increased to include the number of additional common shares that would have been outstanding (using the treasury stock method) if securities containing potentially dilutive common shares (stock options and restricted stock units) had been converted to such common shares, and if such assumed conversion is dilutive. As of June 30, 2013, stock options and restricted stock units relating to an aggregate of approximately 1,083,000 shares were outstanding. For the three and six months ended June 30, 2013, the potential dilutive effect of approximately 102,000 and 100,000 weighted-average shares, respectively, of restricted stock units and stock options were excluded from the computation of diluted weighted-average shares outstanding as the shares would have an anti-dilutive effect on EPS. As of June 30, 2012, stock options and restricted stock units relating to an aggregate of approximately 1,277,000 shares were outstanding. For the three and six months ended June 30, 2012, the potential dilutive effect of 479,000 and 288,000 weighted-average shares, respectively, of restricted stock units and stock options were excluded from the computation of diluted weighted-average shares outstanding as the shares would have an anti-dilutive effect on EPS.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1278-109256 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1252-109256 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 55 -Paragraph 52 -URI http://asc.fasb.org/extlink&oid=32703322&loc=d3e4984-109258 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.21) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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