v2.4.0.6
Income Taxes - Additional Information (Detail) (USD $)
3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Dec. 31, 2011
Dec. 31, 2010
Income Taxes            
Unrecognized tax benefits $ 17,400,000   $ 17,400,000      
Unrecognized tax benefits would impact the effective tax rate 16,200,000   16,200,000      
Increase in unrecognized tax benefits     12,900,000      
Interest accrued 1,100,000   1,100,000      
Effective tax rate from operations     29.60% 7.10%    
Provision for income taxes 1,878,000 974,000 5,183,000 680,000    
Cash and cash equivalents 216,609,000 186,300,000 216,609,000 186,300,000 199,634,000 174,097,000
Undistributed foreign earnings         159,900,000  
U.S. statutory rate     35.00%      
U.S. Entities
           
Income Taxes            
Cash and cash equivalents 40,300,000   40,300,000   35,700,000  
Non-U.S. Entities
           
Income Taxes            
Cash and cash equivalents $ 176,300,000   $ 176,300,000   $ 163,900,000