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Earnings Per Share (Tables) | 9 Months Ended
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Sep. 30, 2013
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted | The following table presents the weighted-average number of common shares outstanding used in the calculation of basic and diluted income per share:
|  | Three Months Ended September 30, |  | Nine Months Ended September 30,
|  | 2013 |  | 2012 |  | 2013 |  | 2012
Numerator: |  |  |  |  |  |  |  |
Basic |  |  |  |  |  |  |  |
Net income (loss) |  | $ | (15,711 | ) |  | $ | (6,619 | ) |  | $ | (23,101 | ) |  | $ | 49,630 |
Undistributed earnings allocated to participating securities |  | — |  |  | — |  |  | — |  |  | (1,641 | )
Total dividends declared / paid |  | (6,243 | ) |  | — |  |  | (12,392 | ) |  | — |
Dividends attributable to common stockholders |  | 6,050 |  |  | — |  |  | 12,035 |  |  | — |
Net income (loss) attributable to common stockholders – basic |  | $ | (15,904 | ) |  | $ | (6,619 | ) |  | $ | (23,458 | ) |  | $ | 47,989 |
Diluted |  |  |  |  |  |  |  |
Net income (loss) |  | $ | (15,711 | ) |  | $ | (6,619 | ) |  | $ | (23,101 | ) |  | $ | 49,630 |
Undistributed earnings allocated to participating securities |  | — |  |  | — |  |  | — |  |  | (1,630 | )
Total dividends declared / paid |  | (6,243 | ) |  | — |  |  | (12,392 | ) |  | — |
Dividends attributable to common stockholders |  | 6,050 |  |  | — |  |  | 12,035 |  |  | — |
Net income (loss) attributable to common stockholders – diluted |  | $ | (15,904 | ) |  | $ | (6,619 | ) |  | $ | (23,458 | ) |  | $ | 48,000 |
Denominator: |  |  |  |  |  |  |  |
Weighted-average shares used in computing net income (loss) per share attributable to common stockholders – basic |  | 48,330,149 |  |  | 48,332,878 |  |  | 48,068,038 |  |  | 46,886,820 |
Effect of potentially dilutive securities: |  |  |  |  |  |  |  |
Common stock options and restricted stock units |  | 199,956 |  |  | 308,496 |  |  | 220,899 |  |  | 352,315 |
Weighted-average shares used in computing net income (loss) per share attributable to common stockholders – diluted |  | 48,530,105 |  |  | 48,641,374 |  |  | 48,288,937 |  |  | 47,239,135 |
Basic net income (loss) per common share |  | $ | (0.33 | ) |  | $ | (0.14 | ) |  | $ | (0.49 | ) |  | $ | 1.02 |
Diluted net income (loss) per common share |  | $ | (0.33 | ) |  | $ | (0.14 | ) |  | $ | (0.49 | ) |  | $ | 1.02 |
Impact of the Revision to the Comparable Prior Period Earnings (Loss) Per Share Calculations Using the Two-Class Method [Table Text Block] | The impact of the revision to the comparable prior period earnings (loss) per share calculations using the two-class method were as follows:
|  | Three Months Ended September 30, |  | Nine Months Ended September 30,
|  | 2012 |  | 2012
Numerator: |  |  |  |
Net income (loss) attributable to common stockholders – basic and diluted - As Reported |  | $ | (6,619 | ) |  | $ | 49,630 |
Net income (loss) attributable to common stockholders – basic - As Adjusted |  | $ | (6,619 | ) |  | $ | 47,989 |
Net income (loss) attributable to common stockholders – diluted - As Adjusted |  | $ | (6,619 | ) |  | $ | 48,000 |
Denominator: |  |  |  |
Weighted-average shares used in computing net income (loss) per share attributable to common stockholders – basic - As Reported |  | 48,332,878 |  |  | 46,886,820 |
Weighted-average shares used in computing net income (loss) per share attributable to common stockholders – basic - As Adjusted |  | 48,332,878 |  |  | 46,886,820 |
Weighted-average shares used in computing net income (loss) per share attributable to common stockholders – diluted - As Reported |  | 48,332,878 |  |  | 47,795,819 |
Weighted-average shares used in computing net income (loss) per share attributable to common stockholders – diluted - As Adjusted |  | 48,641,374 |  |  | 47,239,135 |
Basic net income (loss) per common share - As Reported |  | $ | (0.14 | ) |  | $ | 1.06 |
Basic net income (loss) per common share - As Adjusted |  | $ | (0.14 | ) |  | $ | 1.02 |
Diluted net income (loss) per common share - As Reported |  | $ | (0.14 | ) |  | $ | 1.04 |
Diluted net income (loss) per common share - As Adjusted |  | $ | (0.14 | ) |  | $ | 1.02 |

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- Definition Impact of the Revision to the Comparable Prior Period Earnings (Loss) Per Share Calculations Using the Two-Class Method [Table Text Block] + References No definition available. + Details
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- Definition Tabular disclosure of the effect of income (loss) on an entity's diluted 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 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1311-109256 + Details
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