v2.4.0.6
Income Taxes (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Reconciliation of liability for unrecognized tax benefits    
Balance at the beginning of the period $ 33,872  
Additions based on current year positions 233  
Additions based on prior year positions 1,491  
Currency translation adjustments 641  
Balance at the end of the period $ 36,237  
Effective income tax rate (as a percent) 37.30% 42.60%