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Income Taxes (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jul. 04, 2015 | Jun. 28, 2014 | Jul. 04, 2015 | Jun. 28, 2014
Income Taxes |  |  |  |
Non-cash tax expense |  | $ 0.8 |  |
Reconciliation of tax rates with federal statutory rate |  |  |  |
Effective tax rate (as a percent) | 40.60% | 50.00% | 39.10% | 44.70%

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