Condensed Consolidated Statements of Changes in Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Capital in Excess of Par Value	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock
Balances at Dec. 28, 2019	$ 1,263,430	$ 199	$ 648,492	$ 947,046	$ (106,020)	$ (226,287)
Balances (in shares) at Dec. 28, 2019		228,729,585
Balances, treasury shares at Dec. 28, 2019						(17,215,514)
Net income	52,147			52,147
Derivative instruments, net of tax	(6,132)				(6,132)
Pension and postretirement plans, net of tax	103,618				103,618
Amortization of share-based compensation awards	6,836		6,836
Issuance of deferred compensation			(30)			$ 30
Issuance of deferred compensation (in shares)						2,284
Time-based restricted stock units issued (Note 16)			(975)			$ 975
Time-based restricted stock units issued (in shares)						74,204
Issuance of deferred stock awards			(651)			$ 651
Issuance of deferred stock awards (in shares)						49,539
Stock repurchases	(783)					$ (783)
Stock repurchases (in shares)						(37,433)
Dividends paid on vested share-based payment awards	(109)			(109)
Dividends paid	(82,519)			(82,519)
Balances at Jul. 11, 2020	1,336,488	$ 199	653,672	916,565	(8,534)	$ (225,414)
Balances (in shares) at Jul. 11, 2020		228,729,585
Balances, treasury shares at Jul. 11, 2020						(17,126,920)
Balances at Dec. 28, 2019	1,263,430	$ 199	648,492	947,046	(106,020)	$ (226,287)
Balances (in shares) at Dec. 28, 2019		228,729,585
Balances, treasury shares at Dec. 28, 2019						(17,215,514)
Balances at Jan. 02, 2021	$ 1,372,994	$ 199	659,682	932,094	6,424	$ (225,405)
Balances (in shares) at Jan. 02, 2021		228,729,585
Balances, treasury shares at Jan. 02, 2021	(17,126,261)					(17,126,261)
Balances at Apr. 18, 2020	$ 1,320,611	$ 199	651,258	900,988	(5,892)	$ (225,942)
Balances (in shares) at Apr. 18, 2020		228,729,585
Balances, treasury shares at Apr. 18, 2020						(17,167,036)
Net income	57,919			57,919
Derivative instruments, net of tax	(2,694)				(2,694)
Pension and postretirement plans, net of tax	52				52
Amortization of share-based compensation awards	2,942		2,942
Issuance of deferred compensation			(29)			$ 29
Issuance of deferred compensation (in shares)						2,171
Issuance of deferred stock awards			(499)			$ 499
Issuance of deferred stock awards (in shares)						37,945
Dividends paid on vested share-based payment awards	(22)			(22)
Dividends paid	(42,320)			(42,320)
Balances at Jul. 11, 2020	1,336,488	$ 199	653,672	916,565	(8,534)	$ (225,414)
Balances (in shares) at Jul. 11, 2020		228,729,585
Balances, treasury shares at Jul. 11, 2020						(17,126,920)
Balances at Jan. 02, 2021	$ 1,372,994	$ 199	659,682	932,094	6,424	$ (225,405)
Balances (in shares) at Jan. 02, 2021		228,729,585
Balances, treasury shares at Jan. 02, 2021	(17,126,261)					(17,126,261)
Net income	$ 128,013			128,013
Derivative instruments, net of tax	29				29
Pension and postretirement plans, net of tax	237				237
Amortization of share-based compensation awards	11,957		11,957
Issuance of deferred compensation			(154)			$ 154
Issuance of deferred compensation (in shares)						11,712
Time-based restricted stock units issued (Note 16)			(1,798)			$ 1,798
Time-based restricted stock units issued (in shares)						136,652
Issuance of deferred stock awards			(636)			$ 636
Issuance of deferred stock awards (in shares)						48,231
Stock repurchases	(1,058)					$ (1,058)
Stock repurchases (in shares)						(46,618)
Dividends paid on vested share-based payment awards	(234)			(234)
Dividends paid	(86,808)			(86,808)
Balances at Jul. 17, 2021	$ 1,425,130	$ 199	669,051	973,065	6,690	$ (223,875)
Balances (in shares) at Jul. 17, 2021		228,729,585
Balances, treasury shares at Jul. 17, 2021	(16,976,284)					(16,976,284)
Balances at Apr. 24, 2021	$ 1,413,371	$ 199	664,981	961,246	11,525	$ (224,580)
Balances (in shares) at Apr. 24, 2021		228,729,585
Balances, treasury shares at Apr. 24, 2021						(17,029,750)
Net income	56,358			56,358
Derivative instruments, net of tax	(4,936)				(4,936)
Pension and postretirement plans, net of tax	101				101
Amortization of share-based compensation awards	4,775		4,775
Issuance of deferred compensation			(147)			$ 147
Issuance of deferred compensation (in shares)						11,166
Issuance of deferred stock awards			(558)			$ 558
Issuance of deferred stock awards (in shares)						42,300
Dividends paid on vested share-based payment awards	(71)			(71)
Dividends paid	(44,468)			(44,468)
Balances at Jul. 17, 2021	$ 1,425,130	$ 199	$ 669,051	$ 973,065	$ 6,690	$ (223,875)
Balances (in shares) at Jul. 17, 2021		228,729,585
Balances, treasury shares at Jul. 17, 2021	(16,976,284)					(16,976,284)