v3.26.1
Reclassifications Out of Accumulated Other Comprehensive Income (Loss) to Statement of Operations (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 28, 2026
Jun. 29, 2025
Jun. 28, 2026
Jun. 29, 2025
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Interest income (expense) $ (55) $ (15) $ (13) $ (89)
Unrealized (losses) gains, net 0 (232) 0 350
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Interest income (expense) (55) (15) (13) (89)
Reclassifications, net of tax     (13) (89)
Amortization of Prior Service Credit        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Reclassifications, net of tax 1 2 2 3
Accumulated Other Comprehensive Income (Loss)        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Reclassifications, net of tax $ (54) $ (245) $ (11) $ 264