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SEGMENT AND GEOGRAPHIC INFORMATION Unallocated Corporate Costs (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 26, 2015 | Dec. 27, 2014
Segment Reporting Information [Line Items] |  |  |
Stock-based compensation | $ 43,642 | $ 40,122 | $ 31,035
Depreciation expense | 85,000 | 70,700 | 70,500
Unallocated corporate |  |  |
Segment Reporting Information [Line Items] |  |  |
Stock-based compensation | 27,272 | 25,751 | 18,474
Salary, bonus, and fringe | 39,189 | 33,026 | 30,838
Consulting, audit, and professional services | 23,421 | 15,418 | 13,431
IT related expenses | 13,233 | 8,400 | 6,528
Depreciation expense | 8,423 | 7,414 | 7,703
Acquisition related adjustments | 15,608 | 11,644 | 6,285
Other general unallocated corporate expenses | 14,500 | 9,527 | 8,816
Total unallocated corporate overhead costs | $ 141,646 | $ 111,180 | $ 92,075

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