Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 03, 2020	Oct. 05, 2019	Oct. 03, 2020	Oct. 05, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 44,347	$ 43,358	$ 96,494	$ 162,319
Pension and postretirement plans:
Settlement and curtailment (gain) loss	(5,365)		81,500
Net gain for the period	5,365		21,058
Amortization of prior service cost included in net income	9	59	73	198
Amortization of actuarial loss included in net income	43	1,177	1,039	3,923
Pension and postretirement plans, net of tax	52	1,236	103,670	4,121
Derivative instruments:
Net change in fair value of derivatives	9,409	(7,124)	2,202	(4,577)
Loss (gain) reclassified to net income	677	259	1,752	(2,864)
Derivative instruments, net of tax	10,086	(6,865)	3,954	(7,441)
Other comprehensive income (loss), net of tax	10,138	(5,629)	107,624	(3,320)
Comprehensive income	$ 54,485	$ 37,729	$ 204,118	$ 158,999