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BUSINESS ACQUISITIONS - Argenta and BioFocus, Pro Forma Information (Details) - Agrenta and BioFocus $ / shares in Units, $ in Thousands | 12 Months Ended
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Dec. 27, 2014 USD ($) $ / shares
Business Acquisition [Line Items] |
Revenue | $ | $ 1,322,771
Net income attributable to common shareholders | $ | $ 128,195
Earnings (loss) per common share |
Basic (in dollars per share) | $ / shares | $ 2.75
Diluted (in dollars per share) | $ / shares | $ 2.70

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