Condensed Consolidated Statements Of Income And Comprehensive Income - USD ($)	3 Months Ended		6 Months Ended
	Mar. 30, 2019	Mar. 31, 2018	Mar. 30, 2019	Mar. 31, 2018
Net sales	$ 1,001,843,929	$ 984,562,174	$ 2,063,680,587	$ 1,998,348,252
Cost of goods sold	757,543,262	749,374,530	1,560,969,126	1,518,500,980
Gross profit	244,300,667	235,187,644	502,711,461	479,847,272
Operating and administrative expenses	216,466,382	211,641,694	435,151,046	420,470,090
Gain from sale or disposal of assets	2,911,704	8,223	2,649,113	65,493
Income from operations	30,745,989	23,554,173	70,209,528	59,442,675
Other income, net	447,914	864,480	1,343,373	1,818,439
Interest expense	11,996,863	12,212,865	24,208,524	23,664,587
Income before income taxes	19,197,040	12,205,788	47,344,377	37,596,527
Income tax expense (benefit)	4,197,000	2,911,000	10,192,000	(16,845,000)
Net income	15,000,040	9,294,788	37,152,377	54,441,527
Other comprehensive (expense) income:
Change in fair value of interest rate swap	(598,764)		(154,727)
Income tax benefit	139,316		35,618
Other comprehensive (expense) income, net of tax	(459,448)		(119,109)
Comprehensive income	$ 14,540,592	$ 9,294,788	$ 37,033,268	$ 54,441,527
Class A Common Stock [Member]
Net Income Per share amounts:
Basic earnings per common share	$ 0.76	$ 0.47	$ 1.88	$ 2.76
Diluted earnings per common share	0.74	0.46	1.83	2.69
Cash dividends per common share	0.165	0.165	0.33	0.33
Class B Common Stock [Member]
Net Income Per share amounts:
Basic earnings per common share	0.69	0.43	1.71	2.51
Diluted earnings per common share	0.69	0.43	1.71	2.51
Cash dividends per common share	$ 0.150	$ 0.150	$ 0.30	$ 0.30