Annual report pursuant to Section 13 and 15(d)

Organization and Significant Accounting Policies (Textual) (Detail)

v3.6.0.2
Organization and Significant Accounting Policies (Textual) (Detail) - USD ($)
$ in Thousands
12 Months Ended
Oct. 01, 2014
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Organization Consolidation And Presentation Of Financial Statements Disclosure And Significant Accounting Policies [Line Items]        
Impairment of certain indefinite live intangible assets   $ 0 $ 0 $ 598
Recorded foreign currency translation adjustments   5,003 8,378 11,218
Net foreign currency transactions losses   359 1,415 $ 37
Non-current deferred tax assets   14,915 $ 12,782  
Trade names [Member]        
Organization Consolidation And Presentation Of Financial Statements Disclosure And Significant Accounting Policies [Line Items]        
Impairment of certain indefinite live intangible assets $ 600      
Accounting Standards Update 2016-15 [Member]        
Organization Consolidation And Presentation Of Financial Statements Disclosure And Significant Accounting Policies [Line Items]        
Payment for Contingent Consideration Liability, Investing Activities   1,000    
Adjustments for New Accounting Principle, Early Adoption [Member] | Accounting Standards Update 2016-09 [Member]        
Organization Consolidation And Presentation Of Financial Statements Disclosure And Significant Accounting Policies [Line Items]        
Non-current deferred tax assets   $ 1,600    
Office furniture and equipment [Member] | Minimum [Member]        
Organization Consolidation And Presentation Of Financial Statements Disclosure And Significant Accounting Policies [Line Items]        
Estimated useful lives of property and equipment   3 years    
Office furniture and equipment [Member] | Maximum [Member]        
Organization Consolidation And Presentation Of Financial Statements Disclosure And Significant Accounting Policies [Line Items]        
Estimated useful lives of property and equipment   10 years    
Computer software and hardware [Member] | Minimum [Member]        
Organization Consolidation And Presentation Of Financial Statements Disclosure And Significant Accounting Policies [Line Items]        
Estimated useful lives of property and equipment   3 years    
Computer software and hardware [Member] | Maximum [Member]        
Organization Consolidation And Presentation Of Financial Statements Disclosure And Significant Accounting Policies [Line Items]        
Estimated useful lives of property and equipment   5 years    
Demonstration and loaned equipment [Member] | Maximum [Member]        
Organization Consolidation And Presentation Of Financial Statements Disclosure And Significant Accounting Policies [Line Items]        
Estimated useful lives of property and equipment     5 years  
Buildings [Member] | Minimum [Member]        
Organization Consolidation And Presentation Of Financial Statements Disclosure And Significant Accounting Policies [Line Items]        
Estimated useful lives of property and equipment   30 years    
Buildings [Member] | Maximum [Member]        
Organization Consolidation And Presentation Of Financial Statements Disclosure And Significant Accounting Policies [Line Items]        
Estimated useful lives of property and equipment   40 years    
Software for internal purposes [Member]        
Organization Consolidation And Presentation Of Financial Statements Disclosure And Significant Accounting Policies [Line Items]        
Estimated useful lives of property and equipment     3 years  
Employee Stock Option [Member]        
Organization Consolidation And Presentation Of Financial Statements Disclosure And Significant Accounting Policies [Line Items]        
Share-based Compensation Arrangement by Share-based Payment Award, Award Requisite Service Period   10 years    
Vesting period   4 years    
Restricted Stock Awards [Member] | Employees [Member]        
Organization Consolidation And Presentation Of Financial Statements Disclosure And Significant Accounting Policies [Line Items]        
Vesting period   3 years    
Restricted Stock Awards [Member] | Executives RSAs and RSUs [Member]        
Organization Consolidation And Presentation Of Financial Statements Disclosure And Significant Accounting Policies [Line Items]        
Vesting period   4 years    
Restricted Stock Awards [Member] | Executives RSAs and RSUs [Member] | Vest on second anniversary of the vesting start date [Member]        
Organization Consolidation And Presentation Of Financial Statements Disclosure And Significant Accounting Policies [Line Items]        
Vesting percentage   50.00%    
Restricted Stock Awards [Member] | Executives RSAs and RSUs [Member] | On each of the third and fourth anniversaries of the vesting date[Member]        
Organization Consolidation And Presentation Of Financial Statements Disclosure And Significant Accounting Policies [Line Items]        
Vesting percentage   25.00%    
Restricted Stock Awards [Member] | Director [Member] | On each of the third and fourth anniversaries of the vesting date[Member]        
Organization Consolidation And Presentation Of Financial Statements Disclosure And Significant Accounting Policies [Line Items]        
Vesting period   1 year    
Vesting percentage   100.00%