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Note 15 - Accumulated Other Comprehensive Income (Loss) - Components of Other Comprehensive Loss (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 25, 2021
Dec. 26, 2020
Dec. 28, 2019
Foreign currency translation adjustments, before tax $ (22,859) $ 27,321 $ (7,522)
Foreign currency translation adjustments, tax (97) 0 0
Foreign currency translation adjustments, net of tax (22,956) 27,321 (7,522)
Adjustments related to postretirement benefits, before tax 2,920 2,599 (856)
Adjustments related to postretirement benefits, tax (318) (216) 228
Adjustments related to postretirement benefits, net of tax 2,602 2,383 (628)
Other comprehensive income (loss), before tax (22,521) 29,920 (8,378)
Other comprehensive income (loss), tax (415) (216) 228
Other comprehensive income (loss), net of tax (22,936) 29,704 (8,150)
Foreign currency translation adjustments, before tax (22,859) 27,321 (7,522)
Change in unrealized gain/loss on investments, before tax (67)    
Change in unrealized gain/loss on investments, tax 0    
Change in unrealized gain/loss on investments, net of tax (67) 0 0
Reclassification due to sale of PBC Test Business (2,515)    
Reclassification due to sale of PBC Test Business, tax 0    
Reclassification due to sale of PBC Test Business, net of tax $ (2,515) $ 0 $ 0