SEGMENT INFORMATION (Summary of Net Sales and Long-Lived Assets By Geographic Area) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Net sales and long-lived asset information by geographic area
Net sales	$ 685,028	$ 665,775	$ 710,608	$ 703,350	$ 625,895	$ 624,326	$ 617,746	$ 601,316	$ 2,764,761	$ 2,469,283	$ 2,330,934
Plant, Property & Equipment	991,613				867,906				991,613	867,906	784,321
United States
Net sales and long-lived asset information by geographic area
Net sales									726,336	642,164	619,814
Plant, Property & Equipment	265,004				182,434				265,004	182,434	175,578
Europe
Net sales and long-lived asset information by geographic area
Net sales									1,627,478	1,426,173	1,329,398
Plant, Property & Equipment	577,144				547,795				577,144	547,795	488,977
France
Net sales and long-lived asset information by geographic area
Net sales									862,364	744,856	695,727
Plant, Property & Equipment	308,250				266,804				308,250	266,804	228,082
Germany
Net sales and long-lived asset information by geographic area
Net sales									474,369	416,802	386,553
Plant, Property & Equipment	154,505				163,948				154,505	163,948	154,588
Italy
Net sales and long-lived asset information by geographic area
Net sales									144,044	131,523	126,890
Plant, Property & Equipment	54,978				57,080				54,978	57,080	51,732
Other Europe
Net sales and long-lived asset information by geographic area
Net sales									146,701	132,992	120,228
Plant, Property & Equipment	59,411				59,963				59,411	59,963	54,575
Other Foreign Countries
Net sales and long-lived asset information by geographic area
Net sales									410,947	400,946	381,722
Plant, Property & Equipment	$ 149,465				$ 137,677				$ 149,465	$ 137,677	$ 119,766