CONSOLIDATED STATEMENTS OF INCOME (USD $) In Thousands, except Per Share data	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
CONSOLIDATED STATEMENTS OF INCOME [Abstract]
Net sales	$ 244,015	$ 227,450	$ 495,865	$ 441,323
Cost of goods sold	149,115	141,615	295,972	278,259
Gross profit	94,900	85,835	199,893	163,064
Selling, general, and administrative expenses	58,359	46,482	116,124	99,392
Technical, product engineering, and research expenses	15,367	14,884	30,502	28,050
Restructuring and other, net	2,092	689	2,278	2,081
Operating income	19,082	23,780	50,989	33,541
Interest expense, net	4,786	3,882	9,562	7,707
Other expense/(income), net	55	(2,991)	4,924	(5,272)
Income before income taxes	14,241	22,889	36,503	31,106
Income tax expense	5,359	15,102	10,668	17,729
Income before equity in (losses)/earnings of associated companies	8,882	7,787	25,835	13,377
Equity in (losses)/earnings of associated companies	(120)	90	(340)	98
Net income	$ 8,762	$ 7,877	$ 25,495	$ 13,475
Net income per share:
Basic	$ 0.28	$ 0.25	$ 0.82	$ 0.43
Diluted	$ 0.28	$ 0.25	$ 0.81	$ 0.43
Shares used in computing earnings per share:
Basic	31,263	31,058	31,243	31,001
Diluted	31,489	31,161	31,455	31,105
Dividends per share	$ 0.13	$ 0.12	$ 0.25	$ 0.24