CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Income Statement [Abstract]
Net sales	$ 199,277	$ 172,331
Cost of goods sold	123,372	99,830
Gross profit	75,905	72,501
Selling, general, and administrative expenses	40,906	39,421
Technical and research expenses	10,262	10,132
Restructuring expenses, net	2,681	679
Operating income	22,056	22,269
Interest expense, net	4,328	2,238
Other expense/(income), net	204	(328)
Income before income taxes	17,524	20,359
Income tax expense	6,550	7,043
Net income	10,974	13,316
Net income/(loss) attributable to the noncontrolling interest	135	(185)
Net income attributable to the Company	$ 10,839	$ 13,501
Earnings per share attributable to Company shareholders - Basic	$ 0.34	$ 0.42
Earnings per share attributable to Company shareholders - Diluted	$ 0.34	$ 0.42
Shares of the Company used in computing earnings per share:
Basic	32,128	32,041
Diluted	32,164	32,081
Dividends declared per share, Class A and Class B	$ 0.17	$ 0.17