Income Taxes (Net operating loss carryforwards) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Loss Carryforwards and other details [Abstract]
Deferred Tax Assets, Net of Valuation Allowance	$ 107,628	$ 109,934
Undistributed Earnings of Foreign Subsidiaries	754,200
United States [Member]
Loss Carryforwards and other details [Abstract]
Operating loss carryforwards	363,648	317,841
State Income Taxes [Member]
Loss Carryforwards and other details [Abstract]
Operating loss carryforwards	182,420	173,756
Non-US [Member]
Loss Carryforwards and other details [Abstract]
Operating loss carryforwards	64,999	$ 4,962
Repatriation Of Earnings Estimated Tax Impact	21,600
UNITED STATES
Loss Carryforwards and other details [Abstract]
Tax Credit Carryforward, Amount	8,100
KOREA, REPUBLIC OF
Loss Carryforwards and other details [Abstract]
Operating loss carryforwards	62,900
Deferred Tax Assets, Net of Valuation Allowance	38,200
Tax Credit Carryforward, Amount	$ 13,000
Minimum [Member] | United States [Member]
Loss Carryforwards and other details [Abstract]
Operating loss carryforwards, expiration dates	Dec. 31, 2021
Minimum [Member] | State Income Taxes [Member]
Loss Carryforwards and other details [Abstract]
Operating loss carryforwards, expiration dates	Dec. 31, 2016
Minimum [Member] | Non-US [Member]
Loss Carryforwards and other details [Abstract]
Operating loss carryforwards, expiration dates	Dec. 31, 2017
Maximum [Member] | United States [Member]
Loss Carryforwards and other details [Abstract]
Operating loss carryforwards, expiration dates	Dec. 31, 2035
Maximum [Member] | State Income Taxes [Member]
Loss Carryforwards and other details [Abstract]
Operating loss carryforwards, expiration dates	Dec. 31, 2035
Maximum [Member] | Non-US [Member]
Loss Carryforwards and other details [Abstract]
Operating loss carryforwards, expiration dates	Dec. 31, 2025