v3.26.1
Disaggregated Revenue by Primary Geographical Market, Major Product Line and Timing of Revenue Recognition (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 28, 2026
Jun. 29, 2025
Jun. 28, 2026
Jun. 29, 2025
Disaggregation of Revenue [Line Items]        
Total $ 1,328,990 $ 651,797 $ 2,611,484 $ 1,337,477
Product Test        
Disaggregation of Revenue [Line Items]        
Total 107,248 85,053 187,683 159,242
Point in Time        
Disaggregation of Revenue [Line Items]        
Total 1,219,450 545,291 2,390,717 1,131,240
Point in Time | Product Test        
Disaggregation of Revenue [Line Items]        
Total 90,538 66,159 152,453 122,717
Over Time        
Disaggregation of Revenue [Line Items]        
Total 109,540 106,506 220,767 206,237
Over Time | Product Test        
Disaggregation of Revenue [Line Items]        
Total 16,710 18,894 35,230 36,525
Americas        
Disaggregation of Revenue [Line Items]        
Total 109,579 89,265 223,458 199,180
Americas | Product Test        
Disaggregation of Revenue [Line Items]        
Total 51,036 42,229 98,559 83,014
Europe, Middle East and Africa        
Disaggregation of Revenue [Line Items]        
Total 60,545 55,874 152,473 99,231
Europe, Middle East and Africa | Product Test        
Disaggregation of Revenue [Line Items]        
Total 9,353 7,923 17,577 15,781
Asia Pacific        
Disaggregation of Revenue [Line Items]        
Total 1,158,866 506,658 2,235,553 1,039,066
Asia Pacific | Product Test        
Disaggregation of Revenue [Line Items]        
Total 46,859 34,901 71,547 60,447
System on-a-Chip | Semiconductor Test        
Disaggregation of Revenue [Line Items]        
Total 842,971 396,588 1,724,780 802,978
System on-a-Chip | Point in Time | Semiconductor Test        
Disaggregation of Revenue [Line Items]        
Total 771,416 325,588 1,579,520 663,278
System on-a-Chip | Over Time | Semiconductor Test        
Disaggregation of Revenue [Line Items]        
Total 71,555 71,000 145,260 139,700
System on-a-Chip | Americas | Semiconductor Test        
Disaggregation of Revenue [Line Items]        
Total 14,908 15,920 31,953 50,972
System on-a-Chip | Europe, Middle East and Africa | Semiconductor Test        
Disaggregation of Revenue [Line Items]        
Total 14,040 15,785 63,401 29,021
System on-a-Chip | Asia Pacific | Semiconductor Test        
Disaggregation of Revenue [Line Items]        
Total 814,023 364,883 1,629,426 722,985
Memory | Semiconductor Test        
Disaggregation of Revenue [Line Items]        
Total 212,333 60,943 414,781 170,351
Memory | Point in Time | Semiconductor Test        
Disaggregation of Revenue [Line Items]        
Total 199,765 51,993 393,487 153,656
Memory | Over Time | Semiconductor Test        
Disaggregation of Revenue [Line Items]        
Total 12,568 8,950 21,294 16,695
Memory | Americas | Semiconductor Test        
Disaggregation of Revenue [Line Items]        
Total 941 2,077 7,779 2,994
Memory | Europe, Middle East and Africa | Semiconductor Test        
Disaggregation of Revenue [Line Items]        
Total 562 399 1,115 1,208
Memory | Asia Pacific | Semiconductor Test        
Disaggregation of Revenue [Line Items]        
Total 210,830 58,467 405,887 166,149
IST | Semiconductor Test        
Disaggregation of Revenue [Line Items]        
Total 66,521 34,347 93,065 61,053
IST | Point in Time | Semiconductor Test        
Disaggregation of Revenue [Line Items]        
Total 60,562 28,827 79,328 51,719
IST | Over Time | Semiconductor Test        
Disaggregation of Revenue [Line Items]        
Total 5,959 5,520 13,737 9,334
IST | Americas | Semiconductor Test        
Disaggregation of Revenue [Line Items]        
Total 943 1,879 2,894 2,569
IST | Europe, Middle East and Africa | Semiconductor Test        
Disaggregation of Revenue [Line Items]        
Total 0 0 0 0
IST | Asia Pacific | Semiconductor Test        
Disaggregation of Revenue [Line Items]        
Total 65,578 32,468 90,171 58,484
Universal Robots (UR) | Robotics        
Disaggregation of Revenue [Line Items]        
Total 99,917 74,866 191,175 143,853
Universal Robots (UR) | Point in Time | Robotics        
Disaggregation of Revenue [Line Items]        
Total 97,169 72,724 185,929 139,870
Universal Robots (UR) | Over Time | Robotics        
Disaggregation of Revenue [Line Items]        
Total 2,748 2,142 5,246 3,983
Universal Robots (UR) | Americas | Robotics        
Disaggregation of Revenue [Line Items]        
Total 41,751 27,160 82,273 59,631
Universal Robots (UR) | Europe, Middle East and Africa | Robotics        
Disaggregation of Revenue [Line Items]        
Total 36,590 31,767 70,380 53,221
Universal Robots (UR) | Asia Pacific | Robotics        
Disaggregation of Revenue [Line Items]        
Total $ 21,576 $ 15,939 $ 38,522 $ 31,001