Benefit Plans - Liability Under Executive Benefit Plans (Detail) - USD ($) $ in Thousands	Dec. 29, 2019	Dec. 30, 2018
Defined Benefit Plan Disclosure [Line Items]
Current liabilities	$ 33,699	$ 29,300
Supplemental Savings Incentive Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Current liabilities	8,893	8,255
Noncurrent liabilities	79,921	73,524
Total liability	88,814	81,779
Long-Term Retention Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Current liabilities	102	42
Noncurrent liabilities	3,199	2,140
Total liability	3,301	2,182
Officer Retention Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Current liabilities	3,267	3,014
Noncurrent liabilities	41,062	42,179
Total liability	44,329	45,193
Long-Term Performance Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Current liabilities	7,252	5,234
Noncurrent liabilities	8,416	5,244
Total liability	$ 15,668	$ 10,478