BUSINESS SEGMENTS (Details) - USD ($) $ in Thousands		3 Months Ended								12 Months Ended
		Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting [Abstract]
Net sales		$ 4,128,841	$ 4,141,801	$ 2,086,706	$ 1,968,647	$ 2,099,452	$ 2,148,110	$ 2,150,088	$ 1,961,267	$ 12,325,995	$ 8,358,917	$ 8,176,601
Operating Income (Loss)		92,763	178,095	15,270	60,913	83,808	93,733	97,950	70,726	347,038	346,217	352,440
Segment Reporting Information [Line Items]
Net sales		4,128,841	4,141,801	2,086,706	1,968,647	2,099,452	2,148,110	2,150,088	1,961,267	12,325,995	8,358,917	8,176,601
Operating Income (Loss)		92,763	$ 178,095	$ 15,270	$ 60,913	83,808	$ 93,733	$ 97,950	$ 70,726	347,038	346,217	352,440
Depreciation and amortization										121,600	62,107	62,997
Payments for (Proceeds from) Productive Assets										56,671	44,067	36,210
Segment Reporting, Asset Reconciling Item [Line Items]
Assets		11,880,214				5,017,635				11,880,214	5,017,635
EES
Segment Reporting [Abstract]
Net sales										5,479,760	4,860,541	4,878,836
Operating Income (Loss)										260,207	261,788	289,065
Segment Reporting Information [Line Items]
Net sales										5,479,760	4,860,541	4,878,836
Operating Income (Loss)										260,207	261,788	289,065
Depreciation and amortization										35,811	28,569	30,198
Payments for (Proceeds from) Productive Assets										7,081	20,405	7,487
Segment Reporting, Asset Reconciling Item [Line Items]
Assets		3,726,855				2,523,481				3,726,855	2,523,481
CSS
Segment Reporting [Abstract]
Net sales										3,323,264	909,496	857,481
Operating Income (Loss)										217,163	43,835	34,592
Segment Reporting Information [Line Items]
Net sales										3,323,264	909,496	857,481
Operating Income (Loss)										217,163	43,835	34,592
Depreciation and amortization										37,765	7,155	7,413
Payments for (Proceeds from) Productive Assets										1,495	3,093	129
Segment Reporting, Asset Reconciling Item [Line Items]
Assets		4,275,611				610,046				4,275,611	610,046
UBS
Segment Reporting [Abstract]
Net sales										3,522,971	2,588,880	2,440,284
Operating Income (Loss)										231,702	184,931	165,149
Segment Reporting Information [Line Items]
Net sales										3,522,971	2,588,880	2,440,284
Operating Income (Loss)										231,702	184,931	165,149
Depreciation and amortization										22,380	13,583	13,447
Payments for (Proceeds from) Productive Assets										12,834	6,460	2,235
Segment Reporting, Asset Reconciling Item [Line Items]
Assets		2,947,406				1,747,809				2,947,406	1,747,809
Corporate Segment
Segment Reporting [Abstract]
Net sales										0	0	0
Operating Income (Loss)										(362,034)	(144,337)	(136,366)
Segment Reporting Information [Line Items]
Net sales										0	0	0
Operating Income (Loss)										(362,034)	(144,337)	(136,366)
Depreciation and amortization										25,644	12,800	11,939
Payments for (Proceeds from) Productive Assets										35,261	14,109	$ 26,359
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	[1]	$ 930,342				$ 136,299				$ 930,342	$ 136,299

[1] Total assets for Corporate primarily consist of cash and cash equivalents, deferred income taxes, fixed assets and right-of-use assets associated with operating leases.