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Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 25, 2021
Deferred tax assets:    
Accounts receivable $ 1,195 $ 951
Employment incentives 6,329 6,886
Self-insurance liability 8,717 9,324
Postretirement benefit obligations 5,963 7,412
Net operating loss and credit carryforwards 5,009 6,202
Unrecognized tax benefits 2,869 2,108
Other 1,101 1,830
Total deferred tax assets 31,183 34,713
Deferred tax liabilities:    
Inventories (13,398) (16,038)
Unrealized gains on marketable securities 1,280 (2,177)
Prepaids (5,570) (6,365)
Depreciation (124,720) (125,220)
Total deferred tax liabilities (142,408) (149,800)
Net deferred tax liability $ (111,225) $ (115,087)