Income Taxes - Additional Information (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Income Taxes Disclosure [Line Items]        
Income tax expense $ (51,557) $ (48,731) $ 74,349  
Deferred tax assets, net of valuation allowance, exploration of strategic alternatives 1,500      
Valuation allowances 302 299    
Undistributed earnings of foreign subsidiary 9,000 6,800    
Current tax provision 422 444 (5,023)  
Unrecognized tax benefits 1,242 1,098 1,302 $ 2,411
Unrecognized tax benefits that would impact effective tax rate 1,200      
Unrecognized tax benefits, interest and potential penalties liabilities $ 400      
Statute of limitations minimum 3 years      
Statute of limitations maximum 6 years      
Decreases due to lapse of statute of limitations $ 587 313 1,176  
Fair value of shares held in escrow   800 1,000  
Acquisition of a business in May 2006        
Income Taxes Disclosure [Line Items]        
Reserve recorded   500 300  
U.S. federal        
Income Taxes Disclosure [Line Items]        
Net operating carryforwards 123,000      
State and Local Jurisdiction        
Income Taxes Disclosure [Line Items]        
Net operating carryforwards 130,000      
INDIA        
Income Taxes Disclosure [Line Items]        
Current tax provision 500 1,000 400  
Benefit from tax holiday $ 700 500 $ 400 $ 400
Restatement Adjustment | Corrected State Statutory Rate        
Income Taxes Disclosure [Line Items]        
Income tax expense   2,400    
Affiliated Entity        
Income Taxes Disclosure [Line Items]        
Percentage of interest and penalties indemnified 50.00%      
Due from related parties   $ 1,300    
Decreases due to lapse of statute of limitations $ 1,300