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Income Taxes (Narrative) (Details) | 12 Months Ended |  | 12 Months Ended | 0 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
Dec. 31, 2012 EUR (€) | Dec. 31, 2011 USD ($) | Dec. 31, 2010 USD ($) | Dec. 31, 2012 USD ($) | Dec. 31, 2012 Undistributed Foreign Earnings [Member] USD ($) | Dec. 31, 2012 State [Member] USD ($) | Dec. 31, 2012 Foreign Subsidiary and State Net Operating Losses and Tax Credits [Member] USD ($) | Dec. 31, 2012 State Deferred Tax Assets [Member] USD ($) | Dec. 31, 2012 Operating Loss Carryforward, Foreign Jurisdiction [Member] USD ($) | Dec. 31, 2008 2008 Assessment[Member] EUR (€) | Dec. 28, 2012 2005 Assessment [Member] EUR (€) | Dec. 28, 2012 2009 Assessment [Member] EUR (€) | Dec. 31, 2012 BELGIUM Foreign Tax Authority [Member] EUR (€)
Income Taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Valuation allowance against deferred tax asset |  | $ (334,215,000) | $ (325,127,000) | $ (321,585,000) |  |  |  |  |  |  |  |  |
Change in the valuation allowance |  | (9,088,000) | (40,817,000) |  |  |  | 12,630,000 | (39,461,000) | (170,394,000) |  |  |  |
Foreign currency translation |  | 7,040,000 | 22,046,000 | 5,863,000 |  |  |  |  |  |  |  |  |
Net operating loss carryforwards and tax credit |  | 273,509,000 |  | 247,786,000 |  | 49,081,000 |  |  |  |  |  |  |
Net operating loss carryforwards in various foreign jurisdictions |  |  |  | 198,705,000 |  |  |  |  |  |  |  |  |
Federal income taxes on earnings |  |  |  |  | 786,000,000 |  |  |  |  |  |  |  |
Foreign tax assessment |  |  |  |  |  |  |  |  |  | 23,789,000 | 46,135,000 | 35,567,000 |
Interest on assessment | 2,912,000 |  |  |  |  |  |  |  |  |  |  |  |
Interest income on tax assessment |  |  |  |  |  |  |  |  |  |  |  |  | 1,583,000
Gross unrecognized tax benefits |  | 46,087,000 | 49,943,000 | 53,835,000 |  |  |  |  |  |  |  |  |
Unrecognized tax benefits that would impact effective tax rate |  |  |  | 36,902,000 |  |  |  |  |  |  |  |  |
Interest and penalties |  | 7,998,000 |  | 5,874,000 |  |  |  |  |  |  |  |  |
Accrued/(reversed) interest and penalties |  | 3,755,000 | 9,852,000 | 1,585,000 |  |  |  |  |  |  |  |  |
Amount that unrecognized tax benefits could decrease by in the next 12 month |  |  |  | $ 7,499,000 |  |  |  |  |  |  |  |  |

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