CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Statement [Abstract]
Net sales	$ 235,764	$ 251,373
Cost of goods sold	146,292	159,602
Gross profit	89,472	91,771
Selling, general, and administrative expenses	40,106	40,945
Technical and research expenses	9,130	10,249
Restructuring expenses, net	642	484
Operating income	39,594	40,093
Interest expense, net	3,977	4,417
Other expense/(income), net	15,569	(1,208)
Income before income taxes	20,048	36,884
Income tax expense	12,454	7,476
Net income	7,594	29,408
Net (loss)/income attributable to the noncontrolling interest	(1,515)	218
Net income attributable to the Company	$ 9,109	$ 29,190
Earnings per share attributable to Company shareholders - Basic	$ 0.28	$ 0.90
Earnings per share attributable to Company shareholders - Diluted	$ 0.28	$ 0.90
Shares of the Company used in computing earnings per share:
Basic	32,312	32,272
Diluted	32,320	32,285
Dividends declared per share, Class A and Class B	$ 0.19	$ 0.18