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Accumulated Other Comprehensive Income (Loss) - Summary of Accumulated Other Comprehensive (Loss) (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 30, 2018
Dec. 31, 2017
Jan. 01, 2017
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Beginning Balance $ 458,907 $ 363,024 $ 322,432
Gains (Losses) During the Period, Pre-tax Activity 18,588 (13,015) (18,929)
Gains (Losses) During the Period, Tax Effect (4,573) 3,211 7,287
Reclassification to income, Pre-tax Activity 3,878 11,687 1,874
Reclassification to income, Tax Effect (956) (3,188) (722)
Ending Balance 455,166 458,907 363,024
Foreign Currency Translation Adjustment [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Beginning Balance 14 (11) (5)
Reclassification to income, Pre-tax Activity (19) 40 (11)
Reclassification to income, Tax Effect 5 (15) 5
Ending Balance   14 (11)
Accumulated Other Comprehensive Loss [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Beginning Balance (94,202) (92,897) (82,407)
Ending Balance (77,265) (94,202) (92,897)
Net Pension Activity [Member] | Actuarial Loss [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Beginning Balance (78,618) (72,393) (68,243)
Gains (Losses) During the Period, Pre-tax Activity 4,036 (11,219) (9,777)
Gains (Losses) During the Period, Tax Effect (993) 2,768 3,764
Reclassification to income, Pre-tax Activity 3,830 3,402 3,031
Reclassification to income, Tax Effect (945) (1,176) (1,168)
Ending Balance (72,690) (78,618) (72,393)
Net Pension Activity [Member] | Prior Service Credits [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Beginning Balance (43) (61) (78)
Reclassification to income, Pre-tax Activity 25 28 28
Reclassification to income, Tax Effect (6) (10) (11)
Ending Balance (24) (43) (61)
Net Postretirement Benefits Activity [Member] | October 2017 Divestitures [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Beginning Balance 6,220    
Reclassification to income, Pre-tax Activity   8,257  
Reclassification to income, Tax Effect   (2,037)  
Ending Balance 6,220 6,220  
Net Postretirement Benefits Activity [Member] | Actuarial Loss [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Beginning Balance (23,519) (24,111) (19,825)
Gains (Losses) During the Period, Pre-tax Activity 14,552 (1,796) (9,152)
Gains (Losses) During the Period, Tax Effect (3,580) 443 3,523
Reclassification to income, Pre-tax Activity 1,889 2,942 2,186
Reclassification to income, Tax Effect (464) (997) (843)
Ending Balance (11,122) (23,519) (24,111)
Net Postretirement Benefits Activity [Member] | Prior Service Credits [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Beginning Balance 1,744 3,679 5,744
Reclassification to income, Pre-tax Activity (1,847) (2,982) (3,360)
Reclassification to income, Tax Effect 454 1,047 1,295
Ending Balance $ 351 $ 1,744 $ 3,679