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Income Taxes - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Dec. 31, 2014
Income Taxes          
Unrecognized tax benefits $ 2,700   $ 2,700    
Unrecognized tax benefits would impact the effective tax rate 2,000   2,000    
Interest accrued 500   $ 500    
Effective tax rate from operations     27.50% 25.50%  
Provision for (benefit from) income taxes 9,381 $ (2,831) $ 16,318 $ (5,766)  
Undistributed foreign earnings         $ 201,700
U.S. statutory rate     35.00%    
Federal          
Income Taxes          
Cash and cash equivalents and short-term investments 178,300   $ 178,300   139,100
Foreign          
Income Taxes          
Cash and cash equivalents and short-term investments $ 249,600   $ 249,600   $ 206,400
Germany | Earliest Tax Year          
Income Taxes          
Tax years subject to examination     2013    
Tax years settled which were under tax examination     2009    
Germany | Latest Tax Year          
Income Taxes          
Tax years settled which were under tax examination     2012    
Poland | Earliest Tax Year          
Income Taxes          
Tax years subject to examination     2010    
United Kingdom | Earliest Tax Year          
Income Taxes          
Tax years subject to examination     2013    
Spain | Earliest Tax Year          
Income Taxes          
Tax years subject to examination     2011    
China | Earliest Tax Year          
Income Taxes          
Tax years subject to examination     2010    
United States | Tax Year 2011          
Income Taxes          
Tax years currently under tax examination     2011    
United States | Tax Year 2012          
Income Taxes          
Tax years currently under tax examination     2012