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Accumulated Other Comprehensive Income (Loss) - Summary of Accumulated Other Comprehensive (Loss) (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 29, 2019
Dec. 30, 2018
Dec. 31, 2017
Accumulated Other Comprehensive Income Loss [Line Items]      
Beginning Balance $ 455,166 $ 458,907 $ 363,024
Gains (Losses) During the Period, Pre-tax Activity (26,663) 18,588 (13,015)
Gains (Losses) During the Period, Tax Effect (13,161) (4,573) 3,211
Reclassification to income, Pre-tax Activity 2,769 3,878 11,687
Reclassification to income, Tax Effect (682) (956) (3,188)
Ending Balance 451,116 455,166 458,907
Reclassification of Stranded Tax Effects [Member]      
Accumulated Other Comprehensive Income Loss [Line Items]      
Gains (Losses) During the Period, Tax Effect (19,720)    
Ending Balance (19,720)    
Interest Rate Swap [Member]      
Accumulated Other Comprehensive Income Loss [Line Items]      
Reclassification to income, Pre-tax Activity (359)    
Reclassification to income, Tax Effect 89    
Ending Balance (270)    
Foreign Currency Translation Adjustment [Member]      
Accumulated Other Comprehensive Income Loss [Line Items]      
Beginning Balance   14 (11)
Reclassification to income, Pre-tax Activity (19) (19) 40
Reclassification to income, Tax Effect 3 5 (15)
Ending Balance (16)   14
Accumulated Other Comprehensive Loss [Member]      
Accumulated Other Comprehensive Income Loss [Line Items]      
Beginning Balance (77,265) (94,202) (92,897)
Ending Balance (115,002) (77,265) (94,202)
Net Pension Activity [Member] | Actuarial Loss [Member]      
Accumulated Other Comprehensive Income Loss [Line Items]      
Beginning Balance (72,690) (78,618) (72,393)
Gains (Losses) During the Period, Pre-tax Activity (30,855) 4,036 (11,219)
Gains (Losses) During the Period, Tax Effect 7,590 (993) 2,768
Reclassification to income, Pre-tax Activity 3,688 3,830 3,402
Reclassification to income, Tax Effect (907) (945) (1,176)
Ending Balance (93,174) (72,690) (78,618)
Net Pension Activity [Member] | Prior Service Costs [Member]      
Accumulated Other Comprehensive Income Loss [Line Items]      
Beginning Balance (24) (43) (61)
Reclassification to income, Pre-tax Activity 22 25 28
Reclassification to income, Tax Effect (5) (6) (10)
Ending Balance (7) (24) (43)
Net Postretirement Benefits Activity [Member] | Actuarial Loss [Member]      
Accumulated Other Comprehensive Income Loss [Line Items]      
Beginning Balance (4,902) (17,299) (24,111)
Gains (Losses) During the Period, Pre-tax Activity 4,192 14,552 (1,796)
Gains (Losses) During the Period, Tax Effect (1,031) (3,580) 443
Reclassification to income, Pre-tax Activity 730 1,889 11,199
Reclassification to income, Tax Effect (180) (464) (3,034)
Ending Balance (1,191) (4,902) (17,299)
Net Postretirement Benefits Activity [Member] | Prior Service Costs [Member]      
Accumulated Other Comprehensive Income Loss [Line Items]      
Beginning Balance 351 1,744 3,679
Reclassification to income, Pre-tax Activity (1,293) (1,847) (2,982)
Reclassification to income, Tax Effect 318 454 1,047
Ending Balance $ (624) $ 351 $ 1,744