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Income Taxes - Additional Information (Detail) - USD ($)
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Schedule Of Income Tax [Line Items]        
Change in net deferred taxes $ 489,000      
Net deferred tax asset 26,000      
Net deferred benefit , reserve for uncertain tax positions 121,000      
Foreign currency translation adjustments 342,000      
Deferred tax assets, valuation allowance $ 164,616,000 $ 165,427,000    
Tax credit carryforward beginning expiration year 2020      
Liability for income taxes associated with uncertain tax positions $ 7,090,000 6,559,000 $ 11,851,000 $ 7,064,000
Tax benefits associated with potential transfer pricing adjustments 1,368,000      
Tax benefits associated with state income taxes and other timing adjustments 4,674,000      
Net amount of unrecognized tax benefit related to uncertain tax positions that would impact, if recognized, effective income tax rate 1,048,000      
Interest and penalties related to income tax matters 2,000 101,000 $ (229,000)  
Income tax accrued for payment of interest and penalties 1,060,000 1,062,000    
Undistributed earnings 111,953,000      
Withholding taxes 1,125,000      
United States        
Schedule Of Income Tax [Line Items]        
Deferred tax assets, valuation allowance 164,616,000 $ 165,427,000    
Federal        
Schedule Of Income Tax [Line Items]        
Tax credit carryforwards 15,136,000      
State        
Schedule Of Income Tax [Line Items]        
Tax credit carryforwards $ 11,994,000