Segment Information and Enterprise-Wide Disclosure (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Segment Reporting Revenue Reconciling [Line Items]
Total sales	$ 292,563	$ 222,257	$ 794,789	$ 645,580
Inter-company sales	(68,053)	(55,640)	(178,936)	(175,061)
Net sales	224,510	166,617	615,853	470,519
Property, plant and equipment	328,802	246,578	328,802	246,578	243,296
Total assets	1,202,120	923,167	1,202,120	923,167	920,063
Percentage of net sales	100.00%	100.00%	100.00%	100.00%
Segment Reporting, Factors Used to Identify Entity's Reportable Segments			For financial reporting purposes, the Company operates in a single segment, standard semiconductor products, through the Company’s various manufacturing and distribution facilities. The Company aggregates its products because the products are similar and have similar economic characteristics, and the products are similar in production process and share the same customer type.
Asia [Member]
Segment Reporting Revenue Reconciling [Line Items]
Total sales	205,505	149,695	558,040	422,765
Inter-company sales	(22,856)	(17,312)	(57,752)	(57,364)
Net sales	182,649	132,383	500,288	365,401
Property, plant and equipment	274,630	190,408	274,630	190,408
Total assets	859,322	561,004	859,322	561,004
North America [Member]
Segment Reporting Revenue Reconciling [Line Items]
Total sales	37,017	36,100	109,078	101,902
Inter-company sales	(15,561)	(18,579)	(50,985)	(49,624)
Net sales	21,456	17,521	58,093	52,278
Property, plant and equipment	30,240	29,773	30,240	29,773
Total assets	149,820	133,192	149,820	133,192
Europe [Member]
Segment Reporting Revenue Reconciling [Line Items]
Total sales	50,041	36,462	127,671	120,913
Inter-company sales	(29,636)	(19,749)	(70,199)	(68,073)
Net sales	20,405	16,713	57,472	52,840
Property, plant and equipment	23,932	26,397	23,932	26,397
Total assets	192,978	228,971	192,978	228,971
China [Member]
Segment Reporting Revenue Reconciling [Line Items]
Net sales	81,694	58,353	220,126	120,787
Percentage of net sales	36.00%	35.00%	36.00%	26.00%
Taiwan [Member]
Segment Reporting Revenue Reconciling [Line Items]
Net sales	43,580	33,184	114,991	96,632
Percentage of net sales	19.00%	20.00%	19.00%	21.00%
United States [Member]
Segment Reporting Revenue Reconciling [Line Items]
Net sales	15,443	15,856	40,212	45,192
Percentage of net sales	7.00%	10.00%	6.00%	10.00%
Korea [Member]
Segment Reporting Revenue Reconciling [Line Items]
Net sales	17,434	14,701	50,630	36,554
Percentage of net sales	8.00%	8.00%	8.00%	8.00%
Switzerland [Member]
Segment Reporting Revenue Reconciling [Line Items]
Net sales	13,679	14,151	45,429	42,213
Percentage of net sales	6.00%	8.00%	7.00%	9.00%
Germany [Member]
Segment Reporting Revenue Reconciling [Line Items]
Net sales	9,903	6,285	26,615	19,224
Percentage of net sales	4.00%	4.00%	4.00%	4.00%
Singapore [Member]
Segment Reporting Revenue Reconciling [Line Items]
Net sales	11,419	8,412	34,519	19,888
Percentage of net sales	5.00%	5.00%	5.00%	4.00%
England [Member]
Segment Reporting Revenue Reconciling [Line Items]
Net sales	5,207	7,636	23,916	20,614
Percentage of net sales	3.00%	5.00%	4.00%	4.00%
All Others [Member]
Segment Reporting Revenue Reconciling [Line Items]
Net sales	$ 26,151	$ 8,039	$ 59,415	$ 69,415
Percentage of net sales	12.00%	5.00%	11.00%	14.00%

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Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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Amount, net of accumulated depreciation, depletion and amortization, of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

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