Income Taxes (Net operating loss carryforwards) (Details) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2009	Dec. 31, 2010
Loss Carryforwards and other details [Abstract]
Capital loss carryforwards	$ 18,221,000		$ 18,221,000
Undistributed Earnings Of Foreign Subsidiaries	518,700,000
Repatriation Of Earnings Amount	8,900,000	13,800,000
Internal Revenue Service (IRS) [Member]
Loss Carryforwards and other details [Abstract]
Operating loss carryforwards	396,929,000		386,029,000
Operating loss carryforwards, expiration dates	2020-2031
U.S. [Member]
Loss Carryforwards and other details [Abstract]
Capital loss carryforwards	45,600,000
Capital loss carryforwards, expired		56,800,000
Tax Credit Carryforward, Amount	8,100,000
Tax on repatriated earnings	3,100,000	4,800,000
Non-U.S. [Member]
Loss Carryforwards and other details [Abstract]
Portion of deferred tax asset reserved under valuation allowance	42,400,000
Repatriation Of Earnings Estimated Tax Impact	17,300,000
Operating loss carryforwards	44,082,000		81,334,000
Operating loss carryforwards, expiration dates	2012-2020
State Income Taxes [Member]
Loss Carryforwards and other details [Abstract]
Operating loss carryforwards	233,085,000		251,127,000
Operating loss carryforwards, expiration dates	2012-2031
TAIWAN, PROVINCE OF CHINA
Loss Carryforwards and other details [Abstract]
Tax Credit Carryforward, Amount	2,500,000
KOREA, REPUBLIC OF
Loss Carryforwards and other details [Abstract]
Tax Credit Carryforward, Amount	$ 6,800,000