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Net Income Per Share (Tables) | 6 Months Ended
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Jun. 30, 2016
Earnings Per Share [Abstract] |
Reconciliation of Common Shares Used for Basic and Diluted Earnings Per Share | The following table provides a reconciliation of the common shares used for basic net income per share to the diluted shares used for diluted net income per share:
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2016 |  | 2015 |  | 2016 |  | 2015
Basic weighted average shares outstanding | 45,212,484 |  |  | 45,190,089 |  |  | 45,194,731 |  |  | 45,173,239 |
Effect of potential dilutive shares: |  |  |  |  |  |  |
Warrants | — |  |  | 1,480,990 |  |  | — |  |  | 1,625,901 |
Stock options | — |  |  | 8,409 |  |  | — |  |  | 10,625 |
Restricted stock units | 104,457 |  |  | 18,242 |  |  | 80,680 |  |  | 21,628 |
Performance stock units | 58,147 |  |  | 5,042 |  |  | 34,132 |  |  | 4,094 |
Diluted weighted average shares outstanding | 45,375,088 |  |  | 46,702,772 |  |  | 45,309,543 |  |  | 46,835,487 |

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- Definition Tabular disclosure of the weighted average number of shares used in calculating basic net earnings per share (or unit) and diluted earnings per share (or unit). + 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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