QUARTERLY FINANCIAL DATA (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
QUARTERLY FINANCIAL DATA (Unaudited)
Net Sales	$ 810,355	$ 909,476	$ 907,068	$ 742,146	$ 753,765	$ 787,954	$ 827,488	$ 680,186	$ 3,369,045	$ 3,049,393	$ 2,722,564
Gross Profit	503,610	569,709	583,497	480,874	498,113	502,975	517,814	423,098	2,137,690	1,942,000	1,632,301
Net income	$ 201,321	$ 218,744	$ 222,633	$ 177,980	$ 172,946	$ 191,643	$ 184,219	$ 163,877	$ 820,678	$ 712,685	$ 546,733
EARNINGS PER SHARE
Income (Loss) from Continuing Operations, Per Basic Share	$ 0.36	$ 0.39	$ 0.39	$ 0.31	$ 0.30	$ 0.34	$ 0.31	$ 0.27	$ 1.45	$ 1.21	$ 0.97
Income (Loss) from Continuing Operations, Per Diluted Share	$ 0.35	$ 0.38	$ 0.39	$ 0.31	$ 0.30	$ 0.33	$ 0.30	$ 0.26	$ 1.42	$ 1.19	$ 0.95