Accumulated Other Comprehensive Income or Loss - Schedule Of Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Accumulated Other Comprehensive Income Loss [Line Items]
Balance, value	$ 715,947	$ 721,950	$ 825,407
Other comprehensive income (loss) before reclassifications	219	(2,026)	(2,448)
Income tax (expense) benefit	(55)	458	934
Other comprehensive income (loss), net of tax, before reclassifications	164	(1,568)	(1,514)
Amortization of amounts included in net periodic benefit cost	18,480	1,204	799
Income tax expense	(4,485)	(259)	(302)
Amounts reclassified out of AOCI, net of tax	13,995	945	497
Other comprehensive income (loss), net of tax	14,159	(623)	(1,017)
Balance, value	687,538	715,947	721,950
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Balance, value	(15,759)	(15,136)	(11,437)
Other comprehensive income (loss), net of tax	14,159	(623)	(1,017)
Reclassification of stranded tax effects			(2,682)
Balance, value	$ (1,600)	$ (15,759)	$ (15,136)