Consolidated Statements of Shareholders' Equity Statement - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Treasury Stock	Stock Employee Compensation Trust (SECT)	Supplemental Retirement Plan (SERP) Trust	Accumulated Other Comprehensive Loss	Class A Common Stock	Class A Common Stock Treasury Stock	Class A Common Stock Stock Employee Compensation Trust (SECT)	Class B Common Stock	Class B Common Stock Treasury Stock	Class B Common Stock Stock Employee Compensation Trust (SECT)	Class B Common Stock Supplemental Retirement Plan (SERP) Trust
Beginning of period at Sep. 28, 2024		$ 51,280	$ 784,509	$ 2,635,950	$ (1,082,240)	$ (194,049)	$ (163,821)	$ (202,812)
Increase (Decrease) in Stockholders' Equity
Issuance of shares			8,550		5,563
Equity-based compensation expense			6,014
Adjustments to market - SECT and SERP			(48,954)
Net earnings	$ 112,136			112,136
Dividends				(18,106)
Class A and B shares purchased					(127,355)
Issuance of shares - SECT						19,289
Purchase of shares - SECT	(14,808)					(14,808)
Adjustment to market						26,623	22,331
Other comprehensive income (loss)	(14,060)							(14,060)
End of period at Mar. 29, 2025	$ 1,806,040	51,280	750,119	2,729,980	(1,204,032)	(162,945)	(141,490)	(216,872)
Beginning of period - Common Stock at Sep. 28, 2024									43,835,149			7,444,564
Increase (Decrease) in Stockholders' Equity
Conversion of Class B to Class A									15,590			(15,590)
End of period - Common Stock at Mar. 29, 2025									43,850,739			7,428,974
Beginning of period - Treasury Shares at Sep. 28, 2024									(14,633,512)			(2,861,088)
Increase (Decrease) in Stockholders' Equity
Class A and B shares issued related to equity compensation, shares										12,758			144,758
Class A and B shares purchased, shares										(515,311)			(126,916)
End of period - Treasury Shares at Mar. 29, 2025									(15,136,065)	(15,136,065)		(2,843,246)	(2,843,246)
Beginning of period, Shares at Sep. 28, 2024											(425,148)			(548,084)	(826,170)
Increase (Decrease) in Stockholders' Equity
Issuance of shares - SECT														96,032
Purchase of shares - SECT														(73,032)
End of period, Shares at Mar. 29, 2025											(425,148)			(525,084)	(826,170)
Increase (Decrease) in Stockholders' Equity
Common Stock, Dividends, Per Share, Declared	$ 0.57
Beginning of period at Dec. 28, 2024		51,280	777,060	2,684,515	(1,141,242)	(186,219)	(156,865)	(241,995)
Increase (Decrease) in Stockholders' Equity
Issuance of shares			6,137		4,790
Equity-based compensation expense			2,668
Adjustments to market - SECT and SERP			(35,746)
Net earnings	$ 54,610			54,610
Dividends				(9,145)
Class A and B shares purchased					(67,580)
Issuance of shares - SECT						9,624
Purchase of shares - SECT						(6,721)
Adjustment to market						20,371	15,375
Other comprehensive income (loss)	25,123							25,123
End of period at Mar. 29, 2025	$ 1,806,040	51,280	750,119	2,729,980	(1,204,032)	(162,945)	(141,490)	(216,872)
Beginning of period - Common Stock at Dec. 28, 2024									43,842,821			7,436,892
Increase (Decrease) in Stockholders' Equity
Conversion of Class B to Class A									7,918			(7,918)
End of period - Common Stock at Mar. 29, 2025									43,850,739			7,428,974
Beginning of period - Treasury Shares at Dec. 28, 2024										(14,845,286)			(2,866,603)
Increase (Decrease) in Stockholders' Equity
Class A and B shares issued related to equity compensation, shares										425			76,885
Class A and B shares purchased, shares										(291,204)			(53,528)
End of period - Treasury Shares at Mar. 29, 2025									(15,136,065)	(15,136,065)		(2,843,246)	(2,843,246)
Beginning of period, Shares at Dec. 28, 2024											(425,148)			(541,470)	(826,170)
Increase (Decrease) in Stockholders' Equity
Issuance of shares - SECT														50,933
Purchase of shares - SECT														(34,547)
End of period, Shares at Mar. 29, 2025											(425,148)			(525,084)	(826,170)
Increase (Decrease) in Stockholders' Equity
Common Stock, Dividends, Per Share, Declared	$ 0.29
Beginning of period at Sep. 27, 2025	$ 1,992,555	51,280	839,328	2,834,548	(1,209,200)	(195,491)	(170,191)	(157,719)
Increase (Decrease) in Stockholders' Equity
Issuance of shares			7,339		6,588
Equity-based compensation expense			8,041
Adjustments to market - SECT and SERP			166,836
Net earnings	160,690			160,690
Dividends				(18,706)
Class A and B shares purchased					(49,711)
Issuance of shares - SECT						33,782
Purchase of shares - SECT	(34,470)					(34,470)
Adjustment to market						(83,649)	(83,187)
Other comprehensive income (loss)	(3,628)							(3,628)
End of period at Mar. 28, 2026	$ 2,102,480	51,280	1,021,544	2,976,532	(1,252,323)	(279,828)	(253,378)	(161,347)
Beginning of period - Common Stock at Sep. 27, 2025									43,863,458			7,416,255
Increase (Decrease) in Stockholders' Equity
Conversion of Class B to Class A									10,668			(10,668)
End of period - Common Stock at Mar. 28, 2026									43,874,126			7,405,587
Beginning of period - Treasury Shares at Sep. 27, 2025									(15,013,457)			(2,825,989)
Increase (Decrease) in Stockholders' Equity
Class A and B shares issued related to equity compensation, shares										8,852			199,771
Class A and B shares purchased, shares										(5,289)			(195,155)
End of period - Treasury Shares at Mar. 28, 2026									(15,009,894)	(15,009,894)		(2,821,373)	(2,821,373)
Beginning of period, Shares at Sep. 27, 2025											(425,148)			(526,644)	(826,170)
Increase (Decrease) in Stockholders' Equity
Issuance of shares - SECT														134,492
Purchase of shares - SECT														(120,481)
End of period, Shares at Mar. 28, 2026											(425,148)			(512,633)	(826,170)
Increase (Decrease) in Stockholders' Equity
Common Stock, Dividends, Per Share, Declared	$ 0.59
Beginning of period at Jan. 03, 2026		51,280	920,181	2,904,206	(1,241,614)	(214,872)	(201,585)	(151,796)
Increase (Decrease) in Stockholders' Equity
Issuance of shares			1,560		416
Equity-based compensation expense			4,061
Adjustments to market - SECT and SERP			95,742
Net earnings	$ 81,839			81,839
Dividends				(9,513)
Class A and B shares purchased					(11,125)
Issuance of shares - SECT						6,549
Purchase of shares - SECT						(27,556)
Adjustment to market						(43,949)	(51,793)
Other comprehensive income (loss)	(9,551)							(9,551)
End of period at Mar. 28, 2026	$ 2,102,480	$ 51,280	$ 1,021,544	$ 2,976,532	$ (1,252,323)	$ (279,828)	$ (253,378)	$ (161,347)
Beginning of period - Common Stock at Jan. 03, 2026									43,863,458			7,416,255
Increase (Decrease) in Stockholders' Equity
Conversion of Class B to Class A									10,668			(10,668)
End of period - Common Stock at Mar. 28, 2026									43,874,126			7,405,587
Beginning of period - Treasury Shares at Jan. 03, 2026										(15,009,894)			(2,822,033)
Increase (Decrease) in Stockholders' Equity
Class A and B shares issued related to equity compensation, shares										0			36,160
Class A and B shares purchased, shares										0			(35,500)
End of period - Treasury Shares at Mar. 28, 2026									(15,009,894)	(15,009,894)		(2,821,373)	(2,821,373)
Beginning of period, Shares at Jan. 03, 2026											(425,148)			(445,246)	(826,170)
Increase (Decrease) in Stockholders' Equity
Issuance of shares - SECT														21,755
Purchase of shares - SECT														(89,142)
End of period, Shares at Mar. 28, 2026											(425,148)			(512,633)	(826,170)
Increase (Decrease) in Stockholders' Equity
Common Stock, Dividends, Per Share, Declared	$ 0.30