CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
CONSOLIDATED STATEMENTS OF INCOME [Abstract]
Net sales	$ 178,789	$ 179,861	$ 532,402	$ 553,686
Cost of goods sold	103,045	111,242	325,382	334,915
Gross profit	75,744	68,619	207,020	218,771
Selling, general, and administrative expenses	35,509	33,618	110,674	112,787
Technical, product engineering, and research expenses	10,675	14,924	33,387	43,190
Restructuring expenses, net	3,717	919	13,929	4,058
Operating income	25,843	19,158	49,030	58,736
Interest expense, net	2,671	2,486	8,049	8,121
Other expense/(income), net	1,249	(1,864)	784	(4,464)
Income before income taxes	21,923	18,536	40,197	55,079
Income tax expense	12,243	6,762	20,398	21,435
Net income	9,680	11,774	19,799	33,644
Net income/(loss) attributable to the noncontrolling interest	22	(38)	100	(8)
Net income attributable to the Company	$ 9,658	$ 11,812	$ 19,699	$ 33,652
Earnings per share attributable to Company shareholders - Basic	$ 0.30	$ 0.37	$ 0.62	$ 1.06
Earnings per share attributable to Company shareholders - Diluted	$ 0.30	$ 0.37	$ 0.62	$ 1.05
Shares of the Company used in computing earnings per share:
Basic	32,012	31,848	31,965	31,822
Diluted	32,055	31,946	32,028	31,924
Dividends per share	$ 0.17	$ 0.16	$ 0.50	$ 0.47