CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Income Statement [Abstract]
Net sales	$ 580,897	$ 550,722
Cost of goods sold	377,041	361,620
Gross profit	203,856	189,102
Selling, general & administrative expenses	122,370	113,810
Operating income	81,486	75,292
Other income (expense):
Interest income	777	430
Equity earnings in affiliates	795	626
Other income	956	661
Interest expense	(6,114)	(3,827)
Total other income (expense)	(3,586)	(2,110)
Income before income taxes	77,900	73,182
Income taxes (Note 12)	22,052	19,558
Net income including non-controlling interests	55,848	53,624
Non-controlling interests in subsidiaries’ income (loss)	4	(14)
Net income	$ 55,844	$ 53,638
Basic earnings (loss) per share (in dollars per share)	$ 0.85	$ 0.77
Diluted earnings (loss) per share (in dollars per share)	0.84	0.76
Cash dividends declared per share (in dollars per share)	$ 0.35	$ 0.32