Schedule of Total Impairments (Inclusive of Property, Plant and Equipment, Notes Receivable, Spare Parts, and ROU Assets) and Line Item Recorded in Our Consolidated Statements of Income (Detail) - USD ($)	12 Months Ended
	Jan. 01, 2022	Jan. 02, 2021	Dec. 28, 2019
Restructuring and related impairment charges line item
Restructuring and related impairment charges	$ 0	$ 23,627,000	$ 20,229,000
Property, Plant and Equipment
Restructuring and related impairment charges line item
Restructuring and related impairment charges		16,507,000	5,663,000
Property, Plant and Equipment | Spare Parts
Restructuring and related impairment charges line item
Restructuring and related impairment charges		734,000	174,000
Property, Plant and Equipment | Plant Closings
Restructuring and related impairment charges line item
Restructuring and related impairment charges		5,747,000	5,133,000
Property, Plant and Equipment | Line and Distribution Depot Closings
Restructuring and related impairment charges line item
Restructuring and related impairment charges		629,000	$ 356,000
Property, Plant and Equipment | Lease Impairment Charges
Restructuring and related impairment charges line item
Restructuring and related impairment charges		$ 9,397,000