SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Schedule of Basic and Diluted Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Sep. 30, 2022	Jul. 01, 2022	Apr. 01, 2022	Dec. 31, 2021	Oct. 01, 2021	Jul. 02, 2021	Apr. 02, 2021	Jan. 01, 2021	Sep. 30, 2022	Oct. 01, 2021	Oct. 02, 2020
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income	$ 9,653	$ 14,082	$ 9,900	$ 10,856	$ 6,926	$ 28,774	$ 27,834	$ 19,847	$ 44,491	$ 83,381	$ 55,233
Less: Undistributed earnings reallocated to non-vested shareholders									(174)	(320)	(220)
Dilutive earnings									$ 44,317	$ 83,061	$ 55,013
Dilutive stock options and restricted stock units (in shares)									30	44	30
Weighted average common shares - Dilutive (in shares)									10,151	10,120	10,064
Class A
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Weighted average common shares - Basic (shares)									8,913	8,864	8,822
Net income per common share - Basic (USD per share)	$ 0.96	$ 1.40	$ 0.99	$ 1.08	$ 0.70	$ 2.87	$ 2.78	$ 1.99	$ 4.42	$ 8.34	$ 5.54
Net income per common share - Diluted (USD per share)	0.95	1.38	0.97	1.07	0.68	2.83	2.74	1.96	$ 4.37	$ 8.21	$ 5.47
Class B
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Weighted average common shares - Basic (shares)									1,208	1,212	1,212
Net income per common share - Basic (USD per share)	0.87	1.27	0.90	0.98	0.62	2.61	2.53	1.81	$ 4.02	$ 7.57	$ 5.04
Net income per common share - Diluted (USD per share)	$ 0.95	$ 1.38	$ 0.97	$ 1.07	$ 0.68	$ 2.83	$ 2.74	$ 1.96	$ 4.37	$ 8.21	$ 5.47