Benefit Plans - Summary of Common/Collective Trust Fund Pension Plan Assets (Detail) - USD ($) $ in Thousands	Dec. 30, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Total common/collective trust funds	$ 255,389	$ 257,790
Common/Collective Trust Funds - Fixed Income [Member]
Defined Benefit Plan Disclosure [Line Items]
Total common/collective trust funds	164,307	100,500
Common/Collective Trust Funds - Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Total common/collective trust funds	86,107	$ 157,290
Common/Collective Trust Funds - Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Total common/collective trust funds	$ 4,975