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Income Taxes (Narrative) (Details) (USD $)
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Operating Loss Carryforwards [Line Items]      
Statutory income tax rate for the years 25.00% 25.00% 25.50%
Income Tax Examination, Liability Recorded   $ 5,300,000  
Valuation Allowance, Deferred Tax Asset, Change in Amount   2,300,000  
Unrecognized Tax Benefit, Net 8,800,000 6,300,000  
Unrecognized tax benefits that would impact effective tax rate 8,800,000 6,300,000  
Unrecognized tax benefits which may be realized 2,400,000    
Recognized interest income 2,800,000 100,000  
Accrued interest included in accrued and other liabilities 3,000,000 500,000  
Net deferred tax liability 164,988,000 181,477,000  
Total foreign net operating losses 58,700,000 39,400,000  
Valuation allowance amounts 400,000 4,300,000  
Decrease in valuation allowance 3,900,000 1,100,000  
Undistributed Earnings Of Foreign Subsidiaries 185,000,000    
Undistributed Earnings of Foreign Subsidiaires, Portion That is Not Permanently Reinvested 18,000,000    
Deferred tax liabilities on unremitted earnings of certain subsidiary (1,215,000) (1,175,000)  
Internal Revenue Service (IRS) [Member]
      
Operating Loss Carryforwards [Line Items]      
Operating Loss Carryforwards 13,500,000 5,100,000  
Foreign Country [Member]
      
Operating Loss Carryforwards [Line Items]      
Operating Loss Carryforwards $ 45,200,000 $ 34,300,000