Income Taxes (Narrative) (Details) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011 USD ($)	Dec. 31, 2011 EUR (€)	Dec. 31, 2010 USD ($)	Dec. 31, 2009 USD ($)	Dec. 31, 2011 Undistributed Foreign Earnings [Member] USD ($)	Dec. 31, 2010 Undistributed Foreign Earnings [Member] USD ($)	Dec. 31, 2011 State [Member] USD ($)
Income Taxes [Line Items]
Valuation allowance	$ 334,215		$ 325,127	$ 365,944
Change in the valuation allowance	9,088
State net operating loss carryforwards, valuation allowance	38,498
Foreign currency translation	(7,040)
Federal net operating loss carry forward	141,383
Net operating loss carryforwards and tax credit	273,509		201,337				52,626
Valuation allowance against deferred tax asset	(334,215)		(325,127)	(365,944)
Net operating loss carryforwards in various foreign jurisdictions	584,850
Valuation allowance recorded against deferred tax assets	160,511
Federal income taxes on earnings					700,000	748,000
Tax assessment from Belgian tax authority		24,000
Interest to date on tax assessment		2,500
Percentage of interest on deposit	7.00%	7.00%
Gross unrecognized tax benefits	46,087		49,943	105,779
Unrecognized tax benefits that would impact effective tax rate	36,566
Interest and penalties	7,998		15,550
Accrued/(reversed) interest and penalties	3,755		9,852	8,228
Amount that unrecognized tax benefits could decrease by in the next 12 month	$ 10,240