v3.26.3
Changes in Accumulated Other Comprehensive Income (Loss) (Parenthetical) (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 27, 2026
Sep. 28, 2025
Sep. 27, 2026
Sep. 28, 2025
Dec. 31, 2025
Dec. 31, 2024
Accumulated Other Comprehensive Income (Loss) [Line Items]            
Amounts reclassified from accumulated other comprehensive income (loss), tax $ 18 $ 0 $ 29 $ (74)    
Foreign currency translation adjustments, tax 0 0 0 0 $ 0 $ 0
Unrealized (losses) gains on marketable securities, tax (2,559) (1,831) (2,559) (1,831) (1,892) (2,174)
Unrealized (Losses) Gains on Cash Flow Hedges (12) 0 (12) 0 0 209
Retirement plans prior service benefit, tax (1,137) (1,135) (1,137) (1,135) $ (1,136) $ (1,134)
Foreign Currency Translation Reclassification Adjustments            
Accumulated Other Comprehensive Income (Loss) [Line Items]            
Other comprehensive income (loss) before reclassifications, tax     0 0    
Amounts reclassified from accumulated other comprehensive income (loss), tax     0 0    
Other comprehensive income (loss), tax     0 0    
Unrealized (Losses) Gains on Marketable Securities            
Accumulated Other Comprehensive Income (Loss) [Line Items]            
Other comprehensive income (loss) before reclassifications, tax     (677) 316    
Amounts reclassified from accumulated other comprehensive income (loss), tax 2 0 10 27    
Other comprehensive income (loss), tax     (667) 343    
Unrealized (Losses) Gains on Cash Flow Hedges            
Accumulated Other Comprehensive Income (Loss) [Line Items]            
Other comprehensive income (loss) before reclassifications, tax     (32) (109)    
Amounts reclassified from accumulated other comprehensive income (loss), tax     20 (100)    
Other comprehensive income (loss), tax     12 (209)    
Retirement Plans Prior Service Credit            
Accumulated Other Comprehensive Income (Loss) [Line Items]            
Other comprehensive income (loss) before reclassifications, tax     0 0    
Amounts reclassified from accumulated other comprehensive income (loss), tax $ 0 $ 0 (1) (1)    
Other comprehensive income (loss), tax     $ (1) $ (1)