Segment Information and Enterprise-Wide Disclosure (Tables)

3 Months Ended

Mar. 31, 2013

Segment Information and Enterprise-Wide Disclosure [Abstract]

Schedule Of Revenues From External Customers And Long Lived Assets By Geographical Areas [Table Text Block]

Three Months Ended		Asia		North America		Europe		Consolidated
March 31, 2013
Total sales	$	155,434	$	34,808	$	37,637	$	227,879
Inter-company sales		(16,024)		(15,401)		(19,490)		(50,915)
Net sales	$	139,410	$	19,407	$	18,147	$	176,964
Property, plant and equipment	$	283,840	$	31,352	$	22,981	$	338,173
Total assets	$	820,553	$	142,025	$	182,060	$	1,144,638
Three Months Ended		Asia		North America		Europe		Consolidated
March 31, 2012
Total sales	$	127,371	$	31,732	$	38,945	$	198,048
Inter-company sales		(16,368)		(15,164)		(21,853)		(53,385)
Net sales	$	111,003	$	16,568	$	17,092	$	144,663
Property, plant and equipment	$	165,929	$	32,113	$	29,286	$	227,328
Total assets	$	507,538	$	118,657	$	221,613	$	847,808

Schedule of Revenue by Countries [Table Text Block]

		Net Sales
		for the Three Months			Percentage of
		Ended March 31,			Net Sales
		2013		2012	2013	2012
China	$	58,383	$	49,152	33%	34%
Taiwan		32,274		31,781	18%	22%
Korea		15,762		10,221	9%	7%
Switzerland		14,987		13,513	9%	9%
United States		12,950		14,757	7%	10%
Singapore		9,466		4,645	5%	3%
U.K.		8,572		5,125	5%	4%
Germany		8,333		6,782	5%	5%
All Others (1)		16,237		8,687	9%	6%
Total	$	176,964	$	144,663	100%	100%