CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Statement [Abstract]
Net sales	$ 669,491	$ 567,646	$ 1,877,246	$ 1,710,786
Cost of goods sold	449,975	367,834	1,236,386	1,118,945
Gross profit	219,516	199,812	640,860	591,841
Selling, general & administrative expenses	132,748	117,983	384,964	352,290
Pension settlement charges (Note 11)	(5,283)	0	(5,283)	0
Loss on deconsolidation of Venezuelan subsidiary (Note 1)	0	0	0	34,348
Bargain purchase gain (Note 3)	51,585	0	51,585	0
Operating income	133,070	81,829	302,198	205,203
Other income (expense):
Interest income	1,327	360	3,349	1,225
Equity earnings in affiliates	766	619	2,001	2,084
Other income	1,401	1,303	3,293	2,552
Interest expense	(5,922)	(3,815)	(18,333)	(11,828)
Total other income (expense)	(2,428)	(1,533)	(9,690)	(5,967)
Income before income taxes	130,642	80,296	292,508	199,236
Income taxes (Note 12)	24,531	20,257	69,218	54,264
Net income including non-controlling interests	106,111	60,039	223,290	144,972
Non-controlling interests in subsidiaries’ loss	(15)	(10)	(32)	(32)
Net income	$ 106,126	$ 60,049	$ 223,322	$ 145,004
Basic earnings (loss) per share (in dollars per share)	$ 1.61	$ 0.90	$ 3.40	$ 2.13
Diluted earnings (loss) per share (in dollars per share)	1.59	0.89	3.35	2.11
Cash dividends declared per share (in dollars per share)	$ 0.35	$ 0.32	$ 1.05	$ 0.96