Income Taxes - Deferred Tax Assets and Deferred Tax Liabilities (Details) - USD ($) $ in Thousands	Dec. 25, 2021	Dec. 26, 2020
Deferred tax assets:
Inventories	$ 15,153	$ 13,910
Other postretirement benefits and accrued items	8,382	11,477
Other reserves	9,962	7,782
Foreign tax attributes	6,410	6,250
State tax attributes, net of federal benefit	12,043	21,178
Stock-based compensation	3,608	3,751
Right of use liability	4,988	6,034
Basis difference in unconsolidated affiliates	7,690	8,478
Total deferred tax assets	68,236	78,860
Less valuation allowance	(26,624)	(27,199)
Deferred tax assets, net of valuation allowance	41,612	51,661
Deferred tax liabilities:
Property, plant, and equipment	45,804	48,990
Right of use asset	5,099	6,157
Other liabilities	1,765	638
Total deferred tax liabilities	52,668	55,785
Net deferred tax liabilities	$ (11,056)	$ (4,124)