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Schedule of Segment Reporting Information by Segment Charges (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Oct. 01, 2023
Oct. 02, 2022
Oct. 01, 2023
Oct. 02, 2022
Segment Reporting Information [Line Items]        
Restructuring and other—employee severance $ 6,856 $ 1,796 $ 15,251 $ 19,554
Semiconductor Test        
Segment Reporting Information [Line Items]        
Cost of revenues—inventory charge 10,422 10,829 18,374 13,144
Restructuring and other—employee severance 1,776 0 5,055 0
System Test        
Segment Reporting Information [Line Items]        
Cost of revenues—inventory charge 0 0 1,412 0
Restructuring and other—employee severance 0 0 1,124 0
Robotics        
Segment Reporting Information [Line Items]        
Cost of revenues—inventory charge 652 0 2,203 1,411
Restructuring and other—employee severance 636 1,074 2,707 1,616
Wireless Test        
Segment Reporting Information [Line Items]        
Cost of revenues—inventory charge 0 966 1,080 3,942
Corporate And Eliminations        
Segment Reporting Information [Line Items]        
Restructuring and other—employee severance 1,753 0 2,877 0
Restructuring and other-contract termination 1,511 0 1,511 0
Selling and administrative—equity modification charge 0 0 5,889 0
Restructuring and other—legal settlement charge 0 0 0 14,700
Restructuring and other—other $ 0 $ 700 $ 1,100 $ 2,700