CONSOLIDATED STATEMENTS OF INCOME (USD $) In Thousands, except Per Share data	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
CONSOLIDATED STATEMENTS OF INCOME [Abstract]
Net sales	$ 250,012	$ 228,414	$ 745,877	$ 669,737
Cost of goods sold	154,254	141,879	450,226	420,138
Gross profit	95,758	86,535	295,651	249,599
Selling, general, and administrative expenses	48,840	53,412	164,964	152,804
Technical, product engineering, and research expenses	13,685	14,129	44,187	42,179
Restructuring and other, net	2,705	842	4,983	2,923
Operating income	30,528	18,152	81,517	51,693
Interest expense, net	4,377	4,833	13,939	12,540
Other expense, net	374	5,920	5,298	648
Income before income taxes	25,777	7,399	62,280	38,505
Income tax expense	9,032	3,732	19,700	21,461
Income before equity in (losses)/earnings of associated companies	16,745	3,667	42,580	17,044
Equity in (losses)/earnings of associated companies	(71)	(40)	(411)	58
Net income	$ 16,674	$ 3,627	$ 42,169	$ 17,102
Net income per share:
Basic	$ 0.53	$ 0.12	$ 1.35	$ 0.55
Diluted	$ 0.53	$ 0.12	$ 1.34	$ 0.55
Shares used in computing earnings per share:
Basic	31,278	31,118	31,255	31,040
Diluted	31,462	31,211	31,476	31,476
Dividends per share	$ 0.13	$ 0.12	$ 0.38	$ 0.36