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Accounting Policies - Additional Information (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Jan. 01, 2022
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Summary Of Significant Accounting Policies [Line Items]        
Retained earnings   $ 725,729 $ 736,566  
Standard warranty period   12 months    
Depreciation over life to cost of revenues and selling and administrative expenses, years   6 years    
Net book value of internally manufactured test systems sold   $ 6,600 16,600 $ 7,300
Advertising costs   17,300 13,400 12,800
Losses (gains) on foreign currency transactions   10,800 (2,100) $ 2,600
Trade Accounts Receivable   93,900 111,300  
Debt   0 89,244  
Retained earnings $ 1,800      
Mezzanine equity   0 1,512  
Additional paid-in capital   $ 1,755,963 $ 1,811,545  
Teradyne [Member]        
Summary Of Significant Accounting Policies [Line Items]        
Retained earnings 94,600      
Current debt 1,400      
Debt 6,600      
Mezzanine equity 100,800      
Additional paid-in capital 100,800      
Teradyne [Member] | Accounting Standards Update 2020-06 [Member] | Revision of Prior Period, Accounting Standards Update, Adjustment [Member]        
Summary Of Significant Accounting Policies [Line Items]        
Mezzanine equity $ 0