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Stockholders' Equity (Tables) | 12 Months Ended
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Dec. 31, 2013
Equity [Abstract] |
Summary of Common Shares Reserved for Future Issuance | The Company has reserved shares of common stock for possible future issuance as of December 31, 2013 and 2012 as follows (in thousands):
|  | Shares |
|  | 2013 |  |  | 2012 |
Stock options outstanding under the 2009 Omnibus Incentive Compensation Plan and previous plans |  |  | 3,933 |  |  |  | 4,282 |
Restricted stock units outstanding |  |  | 1,108 |  |  |  | 1,662 |
Future grants of awards under the 2009 Omnibus Incentive Compensation Plan |  |  | 3,668 |  |  |  | 702 |
Shares available under the Employee Stock Purchase Plan |  |  | 1,500 |  |  |  | 0 |
Total shares of common stock reserved for issuance |  |  | 10,209 |  |  |  | 6,646 |

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