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Acquisitions (Details) - USD ($) $ in Thousands |  |  | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
Jan. 20, 2015 | Jan. 02, 2015 | Jun. 26, 2015 | Mar. 27, 2015 | Sep. 25, 2015 | Dec. 26, 2014
Business Acquisition [Line Items] |  |  |  |  |  |
Goodwill |  |  |  |  | $ 397,322 | $ 292,574
HiP |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Cash purchase consideration | $ 160,000 |  |  |  |  |
Revenue for last annual period |  |  |  |  |  | $ 38,000
Sales since the date of acquisition |  |  |  |  | $ 22,000 |
Goodwill |  | $ 86,149 |  |  |  |
Identifiable intangible assets |  | 60,100 |  |  |  |
Goodwill additions (reductions) |  |  | $ (500) |  |  |
White Knight |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Cash purchase consideration |  | 16,000 |  |  |  |
Contingent consideration liability |  | 8,000 |  |  |  |
Goodwill |  | 12,000 |  |  |  |
Identifiable intangible assets |  | 9,000 |  |  |  |
Net tangible assets |  | $ 3,000 |  |  |  |
Alco |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Goodwill additions (reductions) |  |  |  | $ 4,000 |  |

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