CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
CONSOLIDATED STATEMENTS OF INCOME [Abstract]
Net sales	$ 172,289	$ 193,518	$ 353,613	$ 373,825
Cost of goods sold	117,697	118,175	222,337	223,673
Gross profit	54,592	75,343	131,276	150,152
Selling, general, and administrative expenses	39,932	40,012	75,165	79,169
Technical, product engineering, and research expenses	10,411	14,397	22,712	28,266
Restructuring expenses, net	1,211	1,957	10,212	3,139
Operating income	3,038	18,977	23,187	39,578
Interest expense, net	2,702	2,717	5,378	5,635
Other (income)/expenses, net	2,820	(2,133)	(465)	(2,600)
Income/(loss) before income taxes	(2,484)	18,393	18,274	36,543
Income tax expense/(benefit)	(364)	7,216	8,155	14,673
Net income/(loss)	(2,120)	11,177	10,119	21,870
Net income/(loss) attributable to the noncontrolling interest	52	(42)	78	30
Net income/(loss) attributable to the Company	$ (2,172)	$ 11,219	$ 10,041	$ 21,840
Earnings/(losses) per share attributable to Company shareholders - Basic	$ (0.07)	$ 0.35	$ 0.31	$ 0.69
Earnings(losses) per share attributable to Company shareholders - Diluted	$ (0.07)	$ 0.35	$ 0.31	$ 0.68
Shares of the Company used in computing earnings per share:
Basic	31,999	31,832	31,941	31,809
Diluted	31,999	31,935	32,015	31,913
Dividends per share	$ 0.17	$ 0.16	$ 0.33	$ 0.31