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RESTRUCTURING AND ASSET IMPAIRMENTS - Severance and Retention Costs By Classification on the Consolidated Statements of Income (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2016 | Dec. 26, 2015 | Dec. 27, 2014
Restructuring Cost and Reserve [Line Items] |  |  |
Total severance and retention costs | $ 8,454 | $ 6,173 | $ 7,792
Cost of revenue (excluding amortization of intangible assets) |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Total severance and retention costs | 4,717 | 735 | 3,342
Selling, general and administrative |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Total severance and retention costs | $ 3,737 | $ 5,438 | $ 4,450

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