v2.4.0.6
Income Taxes (Details) (USD $)
3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Dec. 31, 2012
Reconciliation of liability for unrecognized tax benefits      
Balance at the beginning of the period $ 20,393,000    
Additions based on current year positions 280,000    
Additions based on prior year positions 1,691,000    
Currency translation adjustments (607,000)    
Balance at the end of the period 21,757,000    
Effective income tax rate (as a percent) 39.60% 37.30%  
Valuation allowance against the tax benefit associated with capital losses 1,100,000    
Prepaid income taxes $ 33,600,000   $ 68,400,000