Condensed Consolidated Statements of Changes in Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Cumulative Effect of Change in Accounting Principle	Common Stock	Capital in Excess of Par Value	Retained Earnings	Retained Earnings Cumulative Effect of Change in Accounting Principle	Accumulated Other Comprehensive Loss	Treasury Stock
Balances at Dec. 29, 2018	$ 1,258,267	$ (2,915)	$ 199	$ 653,477	$ 945,410	$ (2,915)	$ (109,171)	$ (231,648)
Balances (in shares) at Dec. 29, 2018			228,729,585
Balances, treasury shares at Dec. 29, 2018								(17,834,378)
Net income	118,961				118,961
Derivative instruments, net of tax	(576)						(576)
Pension and postretirement plans, net of tax	$ 2,885						2,885
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201602Member
Amortization of share-based compensation awards	$ 4,311			4,311
Issuance of deferred compensation				(3)				$ 3
Issuance of deferred compensation (in shares)								226
Time-based restricted stock units issued (Note 16)				(11,498)				$ 11,498
Time-based restricted stock units issued (in shares)								885,123
Issuance of deferred stock awards				(911)				$ 911
Issuance of deferred stock awards (in shares)								69,377
Stock repurchases	(7,054)							$ (7,054)
Stock repurchases (in shares)								(336,088)
Dividends paid on vested share-based payment awards	(1,361)				(1,361)
Dividends paid	(78,249)				(78,249)
Balances at Jul. 13, 2019	1,294,269		$ 199	645,376	981,846		(106,862)	$ (226,290)
Balances (in shares) at Jul. 13, 2019			228,729,585
Balances, treasury shares at Jul. 13, 2019								(17,215,740)
Balances at Dec. 29, 2018	1,258,267	$ (2,915)	$ 199	653,477	945,410	$ (2,915)	(109,171)	$ (231,648)
Balances (in shares) at Dec. 29, 2018			228,729,585
Balances, treasury shares at Dec. 29, 2018								(17,834,378)
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)							(17,215,514)
Balances at Apr. 20, 2019	$ 1,267,926		$ 199	645,090	969,067		(119,294)	$ (227,136)
Balances (in shares) at Apr. 20, 2019			228,729,585
Balances, treasury shares at Apr. 20, 2019								(17,269,408)
Net income	53,095				53,095
Derivative instruments, net of tax	11,195						11,195
Pension and postretirement plans, net of tax	1,237						1,237
Amortization of share-based compensation awards	1,132			1,132
Issuance of deferred compensation				(2)				$ 2
Issuance of deferred compensation (in shares)								113
Issuance of deferred stock awards				(844)				$ 844
Issuance of deferred stock awards (in shares)								53,555
Dividends paid on vested share-based payment awards	(128)				(128)
Dividends paid	(40,188)				(40,188)
Balances at Jul. 13, 2019	1,294,269		$ 199	645,376	981,846		(106,862)	$ (226,290)
Balances (in shares) at Jul. 13, 2019			228,729,585
Balances, treasury shares at Jul. 13, 2019								(17,215,740)
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)							(17,215,514)
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)
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)							(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)							(17,126,920)
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)							(17,126,920)