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Restructuring And Impairments (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 12 Months Ended
Dec. 31, 2011
Mar. 31, 2012
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Reduction in global workforce, percentage   50.00%
Employee severance and benefit costs   $ 5.3
Lease rentals discount rate   10.10%
Facility exit costs   2.2
Impairment charge 1.7  
Impairment charges of long-lived assets for which there is no remaining future economic benefit   3.6
Klagenfurt And Middleton [Member]
    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Facility exit costs   $ 0.3
Klagenfurt, Austria [Member]
    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Space to be vacated, square feet   8,937
Middleton, WI [Member]
    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Space to be vacated, square feet   33,000
Nuremburg, Germany [Member]
    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Space to be vacated, square feet   3,300