Consolidated Condensed 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 Oct. 01, 2022		$ 51,280	$ 516,123	$ 2,360,055	$ (1,047,012)	$ (73,602)	$ (58,989)	$ (311,042)
Increase (Decrease) in Stockholders' Equity
Issuance of shares			4,315		9,007
Equity-based compensation expense			4,571
Adjustments to market - SECT and SERP			51,497
Net earnings	$ 89,029			89,029
Dividends				(16,859)
Class A and B shares purchased					(18,182)
Issuance of shares - SECT						9,795
Purchase of shares - SECT	(7,221)					(7,221)
Adjustment to market						(28,852)	(22,645)
Other comprehensive income (loss)	68,509							68,509
End of period at Apr. 01, 2023	$ 1,579,777	51,280	576,506	2,432,225	(1,056,187)	(99,880)	(81,634)	(242,533)
Beginning of period - Common Stock at Oct. 01, 2022									43,806,835			7,472,878
Increase (Decrease) in Stockholders' Equity
Conversion of Class B to Class A									0			0
End of period - Common Stock at Apr. 01, 2023									43,806,835			7,472,878
Beginning of period, Shares at Oct. 01, 2022										(14,614,444)	(425,148)		(3,020,291)	(611,942)	(826,170)
Increase (Decrease) in Stockholders' Equity
Class A and B shares issued related to equity compensation, shares										41,619			202,531
Class A and B shares purchased, shares										(90,291)			(129,078)
Issuance of shares - SECT														112,425
Purchase of shares - SECT														(77,810)
End of period, Shares at Apr. 01, 2023										(14,663,116)	(425,148)		(2,946,838)	(577,327)	(826,170)
Increase (Decrease) in Stockholders' Equity
Common Stock, Dividends, Per Share, Declared	$ 0.53
Beginning of period at Dec. 31, 2022		51,280	550,511	2,397,814	(1,055,735)	(89,689)	(71,811)	(257,189)
Increase (Decrease) in Stockholders' Equity
Issuance of shares			2,087		7,283
Equity-based compensation expense			2,128
Adjustments to market - SECT and SERP			21,780
Net earnings	$ 43,013			43,013
Dividends				(8,602)
Class A and B shares purchased					(7,735)
Issuance of shares - SECT						7,234
Purchase of shares - SECT						(5,468)
Adjustment to market						(11,957)	(9,823)
Other comprehensive income (loss)	14,656							14,656
End of period at Apr. 01, 2023	$ 1,579,777	51,280	576,506	2,432,225	(1,056,187)	(99,880)	(81,634)	(242,533)
Beginning of period - Common Stock at Dec. 31, 2022									43,806,835			7,472,878
Increase (Decrease) in Stockholders' Equity
Conversion of Class B to Class A									0			0
End of period - Common Stock at Apr. 01, 2023									43,806,835			7,472,878
Beginning of period, Shares at Dec. 31, 2022										(14,666,508)	(425,148)		(2,991,901)	(602,600)	(826,170)
Increase (Decrease) in Stockholders' Equity
Class A and B shares issued related to equity compensation, shares										6,069			129,791
Class A and B shares purchased, shares										(2,677)			(84,728)
Issuance of shares - SECT														82,356
Purchase of shares - SECT														(57,083)
End of period, Shares at Apr. 01, 2023										(14,663,116)	(425,148)		(2,946,838)	(577,327)	(826,170)
Increase (Decrease) in Stockholders' Equity
Common Stock, Dividends, Per Share, Declared	$ 0.27
Beginning of period at Sep. 30, 2023	$ 1,636,087	51,280	608,270	2,496,979	(1,057,938)	(114,769)	(93,126)	(254,609)
Increase (Decrease) in Stockholders' Equity
Issuance of shares			6,286		6,618
Equity-based compensation expense			5,636
Adjustments to market - SECT and SERP			82,080
Net earnings	107,815			107,815
Dividends				(17,572)
Class A and B shares purchased					(20,238)
Issuance of shares - SECT						15,788
Purchase of shares - SECT	(9,407)					(8,817)
Adjustment to market						(45,497)	(36,583)
Other comprehensive income (loss)	21,656							21,656
End of period at Mar. 30, 2024	$ 1,753,259	51,280	702,272	2,587,222	(1,071,558)	(153,295)	(129,709)	(232,953)
Beginning of period - Common Stock at Sep. 30, 2023									43,822,344			7,457,369
Increase (Decrease) in Stockholders' Equity
Conversion of Class B to Class A									4,006			(4,006)
End of period - Common Stock at Mar. 30, 2024									43,826,350			7,453,363
Beginning of period, Shares at Sep. 30, 2023										(14,657,897)	(425,148)		(2,896,845)	(592,128)	(826,170)
Increase (Decrease) in Stockholders' Equity
Class A and B shares issued related to equity compensation, shares										20,385			168,465
Class A and B shares purchased, shares										(8,335)			(137,421)
Issuance of shares - SECT														111,445
Purchase of shares - SECT														(63,392)
End of period, Shares at Mar. 30, 2024										(14,645,847)	(425,148)		(2,865,801)	(544,075)	(826,170)
Increase (Decrease) in Stockholders' Equity
Common Stock, Dividends, Per Share, Declared	$ 0.55
Beginning of period at Dec. 30, 2023		51,280	673,261	2,536,172	(1,065,654)	(146,373)	(119,869)	(221,600)
Increase (Decrease) in Stockholders' Equity
Issuance of shares			4,126		5,623
Equity-based compensation expense			2,182
Adjustments to market - SECT and SERP			22,703
Net earnings	$ 60,003			60,003
Dividends				(8,953)
Class A and B shares purchased					(11,527)
Issuance of shares - SECT						10,787
Purchase of shares - SECT						(4,846)
Adjustment to market						(12,863)	(9,840)
Other comprehensive income (loss)	(11,353)							(11,353)
End of period at Mar. 30, 2024	$ 1,753,259	$ 51,280	$ 702,272	$ 2,587,222	$ (1,071,558)	$ (153,295)	$ (129,709)	$ (232,953)
Beginning of period - Common Stock at Dec. 30, 2023									43,825,917			7,453,796
Increase (Decrease) in Stockholders' Equity
Conversion of Class B to Class A									433			(433)
End of period - Common Stock at Mar. 30, 2024									43,826,350			7,453,363
Beginning of period, Shares at Dec. 30, 2023										(14,647,019)	(425,148)		(2,891,694)	(584,600)	(826,170)
Increase (Decrease) in Stockholders' Equity
Class A and B shares issued related to equity compensation, shares										1,974			104,202
Class A and B shares purchased, shares										(802)			(78,309)
Issuance of shares - SECT														74,137
Purchase of shares - SECT														(33,612)
End of period, Shares at Mar. 30, 2024										(14,645,847)	(425,148)		(2,865,801)	(544,075)	(826,170)
Increase (Decrease) in Stockholders' Equity
Common Stock, Dividends, Per Share, Declared	$ 0.28