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Equity-Based Compensation - Summary of Equity-Based Compensation Expense (Details) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 27, 2015 USD ($) plan | Sep. 28, 2014 USD ($) | Sep. 27, 2015 USD ($) plan | Sep. 28, 2014 USD ($)
Share-based Compensation |  |  |  |
Number of Equity-Based Compensation Plans | plan | 5 |  | 5 |
Restricted stock units |  |  | $ 2,655 | $ 1,839
Service-Based RSUs |  |  |  |
Share-based Compensation |  |  |  |
Restricted stock units | $ 295 | $ 397 | 1,244 | 1,080
Performance-Based RSUs |  |  |  |
Share-based Compensation |  |  |  |
Restricted stock units | (62) | 146 | 709 | 419
Market-Based RSUs |  |  |  |
Share-based Compensation |  |  |  |
Restricted stock units | 60 | 117 | 702 | 340
RSUs |  |  |  |
Share-based Compensation |  |  |  |
Restricted stock units | 293 | 660 | 2,655 | 1,839
Income tax benefit | $ 110 | $ 252 | $ 998 | $ 703

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