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Commitments and Contingencies (Details) - USD ($) $ in Millions |  | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Mar. 13, 2017 | Apr. 01, 2017 | Dec. 31, 2016 | Dec. 26, 2015
Loss Contingencies [Line Items] |  |  |  |
Increase in lease obligations |  | $ 6.1 |  |
Government billing |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Liability for estimated possible loss |  |  |  | $ 1.5
Increase in liability for estimated possible loss |  |  | $ 0.3 |
Payments to resolve litigation | $ 1.8 |  |  |

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