Changes in Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 25, 2021	Dec. 26, 2020
Accumulated Other Comprehensive Income Loss [Line Items]
Balance	$ 983,409	$ 956,967	$ 735,636
Deferred pension and other post-retirement benefit costs			1,611
Amortization of Deferred benefit costs	253	90	(219)
Currency translation adjustment	(269)	(32)	25
Balance	1,068,549	983,409	956,967
AOCI Attributable to Parent
Accumulated Other Comprehensive Income Loss [Line Items]
Balance	(194)	(252)	(1,669)
Currency translation adjustment	269	(32)	25
Balance	$ (210)	$ (194)	$ (252)