Segment Information and Enterprise-Wide Disclosure (Tables)

3 Months Ended

Mar. 31, 2014

Segment Information and Enterprise-Wide Disclosure [Abstract]

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

As of and for the Three Months Ended		Asia		North America		Europe		Consolidated
March 31, 2014
Total sales	$	190,556	$	35,597	$	41,546	$	267,699
Inter-company sales		(23,285)		(14,737)		(19,691)		(57,713)
Net sales	$	167,271	$	20,860	$	21,855	$	209,986
Property, plant and equipment	$	264,038	$	29,011	$	22,768	$	315,817
Total assets	$	843,435	$	121,094	$	176,075	$	1,140,604
As of and for the 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

Schedule of Revenue by Countries [Table Text Block]

		Net Sales
		for the Three Months			Percentage of
		Ended March 31,			Net Sales
		2014		2013	2014	2013
China	$	127,458	$	107,644	61%	61%
Korea		20,125		15,447	10%	9%
United States		19,641		17,416	9%	10%
Germany		14,827		11,028	7%	6%
Singapore		9,618		8,935	5%	5%
Taiwan		6,883		5,153	3%	3%
All Others (1)		11,434		11,341	5%	6%
Total	$	209,986	$	176,964	100%	100%