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Business Segments and Major Customers (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2011 Customer group source year	Sep. 30, 2010 Customer	Sep. 30, 2011 Customer step year statement group source	Sep. 30, 2010 Customer	Dec. 31, 2010 group source
Business Segments and Major Customers
Number of business groups (in groups)	2		2		2
Financial information of business segments
Revenues	$ 100,263	$ 31,743	$ 229,004	$ 232,469
Gain from settlement		10,300	6,200	116,500	126,800
Segment operating income	84,727	31,305	192,669	316,982
Operating income (loss)	10,736	(11,494)	16,598	183,999
Interest and other expense, net	(6,178)	(4,641)	(17,991)	(13,656)
Income (loss) before income taxes	4,558	(16,135)	(1,393)	170,343
Property, plant and equipment, net	72,494		72,494		67,770
Number of major customers	3	4	4	1
Semiconductor Business Group ("SBG")
Financial information of business segments
Revenues	84,628	31,668	212,779	232,207
Gain from settlement		10,300	6,200	116,500
Segment operating income	75,456	32,906	190,101	321,166
Operating income (loss)	75,456	32,906	190,101	321,166
New Business Group ("NBG")
Financial information of business segments
Revenues	15,635	75	16,225	262
Segment operating income	9,271	(1,601)	2,568	(4,184)
Operating income (loss)	9,271	(1,601)	2,568	(4,184)
Reconciling items
Financial information of business segments
Operating income (loss)	(73,991)	(42,799)	(176,071)	(132,983)
Unallocated amounts: Corporate expenses
Financial information of business segments
Operating income (loss)	(44,602)	(25,260)	(104,992)	(79,667)
Unallocated amounts: Unallocated expenses
Financial information of business segments
Operating income (loss)	(29,389)	(17,539)	(71,079)	(53,316)
Customer 1
Financial information of business segments
Revenue of major customer as a percentage of total revenue (as a percent)	25.00%	47.00%	30.00%	72.00%
Customer 2
Financial information of business segments
Revenue of major customer as a percentage of total revenue (as a percent)	25.00%	12.00%	11.00%
Customer 3
Financial information of business segments
Revenue of major customer as a percentage of total revenue (as a percent)	12.00%	11.00%	11.00%
Customer 4
Financial information of business segments
Revenue of major customer as a percentage of total revenue (as a percent)		10.00%	11.00%
North America
Financial information of business segments
Revenues	54,559	5,025	82,655	15,801
Korea
Financial information of business segments
Revenues	24,641	14,853	68,859	166,732
Japan
Financial information of business segments
Revenues	19,899	11,819	76,149	49,692
Europe
Financial information of business segments
Revenues	997	11	1,011	151
Asia-Other
Financial information of business segments
Revenues	167	35	330	93
United States
Financial information of business segments
Property, plant and equipment, net	71,200		71,200		66,700
Revenue from a country in North America as a minimum percentage of total revenue	10.00%	10.00%	10.00%
India
Financial information of business segments
Property, plant and equipment, net	1,300		1,300		1,000
Other foreign locations
Financial information of business segments
Property, plant and equipment, net					$ 100
Canada
Financial information of business segments
Revenue from a country in North America as a minimum percentage of total revenue	10.00%

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