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Description of the Business and Summary of Significant Accounting Policies (Details 3) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
source
deliverables
Dec. 31, 2011
Deferred installation costs    
Deferred installation costs, net of accumulated depreciation $ 36,400 $ 40,900
Income Taxes    
Valuation allowance of against the benefit of certain deferred tax assets of foreign and domestic subsidiaries $ 241,156 $ 236,296
Revenue Recognition    
Number of sources from where entity derives revenue 3  
Printed Products    
Number of deliverables 2  
Software systems development costs, net
   
Other Assets and Investments    
Useful life minimum (in years) 2  
Useful life maximum (in years) 10