Segment Information and Enterprise-Wide Disclosure - Schedule of Net Sales by Countries (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting Revenue Reconciling Item [Line Items]
NET SALES	$ 223,671	$ 233,777	$ 223,217	$ 209,986	$ 210,993	$ 224,510	$ 214,379	$ 176,964	$ 890,651	$ 826,846	$ 633,806
Percentage of net sales									100.00%	100.00%	100.00%
CHINA
Segment Reporting Revenue Reconciling Item [Line Items]
NET SALES									555,478	522,587	381,307
Percentage of net sales									62.00%	63.00%	60.00%
UNITED STATES
Segment Reporting Revenue Reconciling Item [Line Items]
NET SALES									82,599	72,232	62,862
Percentage of net sales									9.00%	9.00%	10.00%
Korea
Segment Reporting Revenue Reconciling Item [Line Items]
NET SALES									66,772	68,693	52,670
Percentage of net sales									7.00%	8.00%	8.00%
Germany
Segment Reporting Revenue Reconciling Item [Line Items]
NET SALES									59,240	45,631	41,037
Percentage of net sales									7.00%	6.00%	6.00%
Singapore
Segment Reporting Revenue Reconciling Item [Line Items]
NET SALES									49,191	43,066	26,877
Percentage of net sales									6.00%	5.00%	4.00%
TAIWAN, PROVINCE OF CHINA
Segment Reporting Revenue Reconciling Item [Line Items]
NET SALES									27,207	30,233	20,973
Percentage of net sales									3.00%	4.00%	3.00%
All Others
Segment Reporting Revenue Reconciling Item [Line Items]
NET SALES									$ 50,164	$ 44,404	$ 48,080
Percentage of net sales									6.00%	5.00%	9.00%