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ACQUISITIONS - Preliminary Fair Values of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands | Sep. 26, 2015 | Dec. 27, 2014 | Oct. 06, 2014
--- | --- | --- | ---
Business Acquisition [Line Items] |  |  |
Goodwill | $ 362,683 | $ 385,111 |
Shakespeare |  |  |
Business Acquisition [Line Items] |  |  |
Current assets |  |  | $ 12,532
Property, plant and equipment |  |  | 10,694
Intangible assets |  |  | 13,500
Goodwill |  |  | 15,416
Total fair value of assets acquired |  |  | 52,142
Current liabilities |  |  | 3,870
Net assets acquired |  |  | $ 48,272

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