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Income Taxes (Details Textual) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Income Taxes (Textual) [Abstract]      
Income tax expense at federal statutory rate 35.00%    
Income Taxes (Additional Textual) [Abstract]      
Valuation allowance related to net operating loss carryforwards $ 11.7    
Increment of operating loss carryforwards, valuation allowance amount recorded   2.4  
Undistributed earnings of foreign subsidiaries 371.6 258.0  
Unrecognized tax benefits 24.0    
Liabilities for uncertain tax positions 10.2    
Maximum [Member]
      
Income Taxes (Textual) [Abstract]      
Interest expense, net of federal benefit and penalties, related to liabilities for uncertain tax positions 1.0 1.0 1.0
Federal [Member]
      
Income Taxes (Textual) [Abstract]      
Operating loss carryforwards 10.0    
Expiration date of NOLs between 2020 and 2032    
Change in operating loss carryforwards valuation allowance 2.5    
State [Member]
      
Income Taxes (Textual) [Abstract]      
Operating loss carryforwards 7.3    
Expiration date of NOLs between 2020 and 2032    
Foreign [Member]
      
Income Taxes (Textual) [Abstract]      
Operating loss carryforwards 49.3    
Expiration date of NOLs between 2012 and 2017    
Change in operating loss carryforwards valuation allowance 4.9    
Singapore [Member]
      
Income Taxes (Textual) [Abstract]      
Income tax expense at federal statutory rate   5.00%  
Singapore's statutory tax rate   17.00%  
Tax incentive agreement expiration date   Jun. 30, 2016  
Agreement maturity extension period   5 years  
Decrease to the 2012 tax provision $ 4.3