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Benefit Plans - Change in Plan Assets (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 29, 2019
Dec. 30, 2018
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets at beginning of year $ 255,389  
Fair value of plan assets at end of year 276,085 $ 255,389
Pension Plans [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets at beginning of year 256,168 258,513
Actual return on plan assets 29,549 (10,242)
Employer contributions 4,900 20,000
Benefits paid (13,918) (12,103)
Fair value of plan assets at end of year $ 276,699 $ 256,168