SEGMENT AND GEOGRAPHIC INFORMATION - Unallocated Corporate Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Stock-based compensation, before income taxes	$ 47,346	$ 44,003	$ 43,642
Depreciation	96,900	89,800	85,000
Unallocated corporate
Segment Reporting Information [Line Items]
Stock-based compensation, before income taxes	32,068	27,114	27,272
Compensation, benefits, and other employee-related expenses	69,191	46,920	36,349
External consulting and other service expenses	18,652	22,224	23,421
Information technology	12,463	11,997	13,233
Depreciation	6,805	9,284	8,423
Acquisition and integration	16,295	3,728	15,608
Other general unallocated corporate	13,400	11,733	14,500
Total unallocated corporate expense	$ 168,874	$ 133,000	$ 138,806