SEGMENT INFORMATION - Other Reconciling Items from Segments to Consolidated (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jul. 01, 2018	Apr. 01, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Net sales	$ 549,460	$ 566,186	$ 613,218	$ 608,218	$ 531,211	$ 575,139	$ 604,879	$ 551,832	$ 2,337,082	$ 2,263,061	$ 1,635,653
Operating income									154,442	178,415	121,900
Unallocated corporate expenses									(268,429)	(237,451)	(157,015)
Amortization									(35,908)	(34,213)	(19,374)
Total assets	1,470,993				1,231,231				1,470,993	1,231,231
Corporate assets unallocated to segments	180,849				177,145				180,849	177,145
Intangible assets, net	357,014				382,982				357,014	382,982	263,467
Depreciation and amortization									62,795	55,052	33,541
Capital expenditures									27,661	34,486	22,497
Operating Segments
Segment Reporting Information [Line Items]
Net sales									2,372,645	2,300,283	1,668,901
Operating income									213,866	246,737	170,493
Total assets	1,294,922				1,189,056				1,294,922	1,189,056
Depreciation and amortization									59,570	52,360	31,002
Capital expenditures									27,264	33,004	21,513
Segment Reconciling Items
Segment Reporting Information [Line Items]
Unallocated corporate expenses									(23,516)	(34,109)	(29,219)
Amortization									(35,908)	(34,213)	(19,374)
Total assets	139,390				6,895				139,390	6,895
Consolidation, Eliminations
Segment Reporting Information [Line Items]
Net sales									(35,563)	(37,222)	(33,248)
Corporate, Non-Segment
Segment Reporting Information [Line Items]
Corporate assets unallocated to segments	$ 36,681				$ 35,280				36,681	35,280
Depreciation and amortization									3,225	2,692	2,539
Capital expenditures									$ 397	$ 1,482	$ 984