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SEGMENT INFORMATION - Summary of Unallocated Corporate Overhead (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 28, 2020 | Mar. 30, 2019
Segment Reporting Information [Line Items] |  |
Stock-based compensation | $ 10,960 | $ 12,899
Unallocated corporate |  |
Segment Reporting Information [Line Items] |  |
Stock-based compensation | 6,704 | 8,274
Compensation, benefits, and other employee-related expenses | 21,980 | 22,038
External consulting and other service expenses | 2,469 | 3,810
Information technology | 3,716 | 2,723
Depreciation | 812 | 1,447
Acquisition and integration | 6,983 | 5,472
Other general unallocated corporate | 3,823 | 2,480
Total unallocated corporate expense | $ 46,487 | $ 46,244

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