Income Taxes (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Income Taxes [Line Items]
Net changes in the total valuation allowance	$ (19,300,000)	$ (11,100,000)	$ (2,900,000)
Cumulative undistributed earnings	491,000,000
Tax incentives	10,500,000	8,700,000	9,900,000
Net impact of holiday tax incentives, per diluted share	$ 0.18	$ 0.14	$ 0.15
Income tax reconciliation tax holidays expiration date	2015
Interest on unrecognized tax	1,600,000
Penalty on unrecognized tax	1,600,000
Tax refund	8,200,000
Additional reserve for uncertain tax benefits	7,056,000	120,000	135,000
Interest and penalties included in income tax expense	(200,000)	(300,000)	70,000
Unrecognized tax benefits including interest and penalties	21,300,000
U.S. [Member]
Income Taxes [Line Items]
Net changes in the total valuation allowance	(19,100,000)	(10,500,000)
Operating loss carryforwards	105,100,000
Tax credit carryforwards	3,700,000
Tax credit carryforwards expiration dates	2031
Foreign Jurisdictions [Member]
Income Taxes [Line Items]
Operating loss carryforwards	3,500,000
Indefinite carryforward	34,400,000
Operating loss carryforwards expiration dates	2020
State And Local Jurisdiction [Member]
Income Taxes [Line Items]
Operating loss carryforwards	106,500,000
Tax credit carryforwards	1,700,000
Tax credit carryforwards expiration dates	2027
Thailand Tax Authorities [Member]
Income Taxes [Line Items]
Additional reserve for uncertain tax benefits	$ 7,100,000
Minimum [Member] | U.S. [Member]
Income Taxes [Line Items]
Operating loss carryforwards expiration dates	2022
Minimum [Member] | State And Local Jurisdiction [Member]
Income Taxes [Line Items]
Operating loss carryforwards expiration dates	2017
Maximum [Member] | U.S. [Member]
Income Taxes [Line Items]
Operating loss carryforwards expiration dates	2031
Maximum [Member] | State And Local Jurisdiction [Member]
Income Taxes [Line Items]
Operating loss carryforwards expiration dates	2031