Segment Information and Enterprise-Wide Disclosure (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Segment Reporting Revenue Reconciling [Line Items]
Total sales	$ 272,981	$ 225,275	$ 502,226	$ 423,323
Inter-company sales	(58,602)	(66,036)	(110,883)	(119,421)
Net sales	214,379	159,239	391,343	303,902
Property, plant and equipment	331,287	226,943	331,287	226,943	243,296
Total assets	1,171,574	859,793	1,171,574	859,793	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	195,735	145,699	352,535	273,071
Inter-company sales	(18,873)	(23,684)	(34,896)	(40,052)
Net sales	176,862	122,015	317,639	233,019
Property, plant and equipment	277,608	168,596	277,608	168,596
Total assets	837,332	517,232	837,332	517,232
North America [Member]
Segment Reporting Revenue Reconciling [Line Items]
Total sales	37,253	34,071	72,061	65,802
Inter-company sales	(18,657)	(15,881)	(35,424)	(31,045)
Net sales	18,596	18,190	36,637	34,757
Property, plant and equipment	30,579	31,127	30,579	31,127
Total assets	150,733	119,600	150,733	119,600
Europe [Member]
Segment Reporting Revenue Reconciling [Line Items]
Total sales	39,993	45,505	77,630	84,450
Inter-company sales	(21,072)	(26,471)	(40,563)	(48,324)
Net sales	18,921	19,034	37,067	36,126
Property, plant and equipment	23,100	27,220	23,100	27,220
Total assets	183,509	222,961	183,509	222,961
China [Member]
Segment Reporting Revenue Reconciling [Line Items]
Net sales	80,049	51,658	138,432	100,810
Percentage of net sales	37.00%	32.00%	35.00%	33.00%
Taiwan [Member]
Segment Reporting Revenue Reconciling [Line Items]
Net sales	39,137	31,667	71,411	63,448
Percentage of net sales	18.00%	20.00%	18.00%	21.00%
United States [Member]
Segment Reporting Revenue Reconciling [Line Items]
Net sales	11,819	13,377	24,769	28,134
Percentage of net sales	6.00%	8.00%	6.00%	9.00%
Korea [Member]
Segment Reporting Revenue Reconciling [Line Items]
Net sales	17,434	11,632	33,196	21,853
Percentage of net sales	8.00%	7.00%	9.00%	7.00%
Switzerland [Member]
Segment Reporting Revenue Reconciling [Line Items]
Net sales	16,763	14,549	31,750	28,062
Percentage of net sales	8.00%	10.00%	8.00%	9.00%
Germany [Member]
Segment Reporting Revenue Reconciling [Line Items]
Net sales	8,379	6,157	16,712	12,939
Percentage of net sales	4.00%	4.00%	4.00%	4.00%
Singapore [Member]
Segment Reporting Revenue Reconciling [Line Items]
Net sales	13,634	6,831	23,100	11,476
Percentage of net sales	6.00%	4.00%	6.00%	5.00%
England [Member]
Segment Reporting Revenue Reconciling [Line Items]
Net sales	10,137	7,853	18,709	12,978
Percentage of net sales	5.00%	5.00%	5.00%	4.00%
All Others [Member]
Segment Reporting Revenue Reconciling [Line Items]
Net sales	$ 17,027	$ 15,515	$ 33,264	$ 24,202
Percentage of net sales	8.00%	10.00%	9.00%	8.00%

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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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