SEGMENT AND GEOGRAPHIC INFORMATION - Unallocated Corporate Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Segment Reporting Information [Line Items]
Stock-based compensation	$ 57,271	$ 47,346	$ 44,003
Depreciation	108,600	96,900	89,800
Unallocated corporate
Segment Reporting Information [Line Items]
Stock-based compensation	37,855	32,068	27,114
Compensation, benefits, and other employee-related expenses	73,893	69,191	46,920
External consulting and other service expenses	16,639	18,652	22,224
Information technology	16,080	12,463	11,997
Depreciation	4,175	6,805	9,284
Acquisition and integration	26,877	16,295	3,728
Other general unallocated corporate	11,565	13,400	11,733
Total unallocated corporate expense	$ 187,084	$ 168,874	$ 133,000