Segment Information and Enterprise-wide Disclosures (Revenue by Customer locations) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Segment Reporting, Revenue Reconciling Item [Line Items]
NET SALES	$ 210,993	$ 224,510	$ 214,379	$ 176,964	$ 163,287	$ 166,617	$ 159,239	$ 144,663	$ 826,846	$ 633,806	$ 635,251
Sales Revenue Net Percentage									100.00%	100.00%	100.00%
China [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
NET SALES									522,587	381,307	359,647
Sales Revenue Net Percentage									63.00%	60.00%	57.00%
United States [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
NET SALES									72,232	62,862	71,796
Sales Revenue Net Percentage									9.00%	10.00%	11.00%
Korea [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
NET SALES									68,693	52,670	39,051
Sales Revenue Net Percentage									8.00%	8.00%	6.00%
Germany [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
NET SALES									45,631	41,037	48,264
Sales Revenue Net Percentage									6.00%	6.00%	8.00%
Singapore [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
NET SALES									43,066	26,877	24,036
Sales Revenue Net Percentage									5.00%	4.00%	4.00%
Taiwan [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
NET SALES									30,233	20,973	33,437
Sales Revenue Net Percentage									4.00%	3.00%	5.00%
All Others [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
NET SALES									$ 44,404	$ 48,080	$ 59,020
Sales Revenue Net Percentage									5.00%	9.00%	9.00%