CONSOLIDATED CONDENSED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Common Stock	Treasury Stock	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	Accumulated Other Comprehensive (Loss)/Income
Beginning balance (shares) at Sep. 28, 2019			63,173,000
Beginning balance at Sep. 28, 2019	$ 769,063	$ (769)	$ 533,590	$ (349,212)	$ 594,625	$ (769)	$ (9,940)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of stock for services rendered (shares)			9,000
Issuance of stock for services rendered	222		$ 131	91
Repurchase of common stock (shares)			(224,000)
Repurchase of common stock	(5,369)			(5,369)
Issuance of shares for equity based compensation (shares)			800,000
Issuance of shares for equity-based compensation			$ (7,653)	7,653
Equity-based compensation	3,387		$ 3,387
Cash dividend declared	(7,651)				(7,651)
Net income	13,477				13,477
Other comprehensive income	3,293						3,293
Total comprehensive income	16,770				13,477		3,293
Ending balance (shares) at Dec. 28, 2019			63,758,000
Ending balance at Dec. 28, 2019	775,653		$ 529,455	(346,837)	599,682		(6,647)
Beginning balance (shares) at Sep. 28, 2019			63,173,000
Beginning balance at Sep. 28, 2019	769,063	$ (769)	$ 533,590	(349,212)	594,625	$ (769)	(9,940)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	36,516
Other comprehensive income	2,666
Total comprehensive income	39,182
Ending balance (shares) at Jun. 27, 2020			61,925,000
Ending balance at Jun. 27, 2020	749,644		$ 536,487	(387,302)	607,733		(7,274)
Beginning balance (shares) at Dec. 28, 2019			63,758,000
Beginning balance at Dec. 28, 2019	775,653		$ 529,455	(346,837)	599,682		(6,647)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of stock for services rendered (shares)			8,000
Issuance of stock for services rendered	221		$ 142	79
Repurchase of common stock (shares)			(872,000)
Repurchase of common stock	(18,522)			(18,522)
Issuance of shares for equity based compensation (shares)			19,000
Issuance of shares for equity-based compensation			$ (185)	185
Issuance of shares for equity-based compensation	0
Equity-based compensation	3,500		$ 3,500
Cash dividend declared	(7,557)				(7,557)
Net income	11,888				11,888
Other comprehensive income	(2,785)						(2,785)
Total comprehensive income	9,103				11,888		(2,785)
Ending balance (shares) at Mar. 28, 2020			62,913,000
Ending balance at Mar. 28, 2020	762,398		$ 532,912	(365,095)	604,013		(9,432)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of stock for services rendered (shares)			9,000
Issuance of stock for services rendered	186		$ 102	84
Repurchase of common stock (shares)			(1,004,000)
Repurchase of common stock	(22,358)			(22,358)
Issuance of shares for equity based compensation (shares)			7,000
Issuance of shares for equity-based compensation			$ (67)	67
Issuance of shares for equity-based compensation	0
Equity-based compensation	3,540		$ 3,540
Cash dividend declared	(7,431)				(7,431)
Net income	11,151				11,151
Other comprehensive income	2,158						2,158
Total comprehensive income	13,309				11,151		2,158
Ending balance (shares) at Jun. 27, 2020			61,925,000
Ending balance at Jun. 27, 2020	749,644		$ 536,487	(387,302)	607,733		(7,274)
Beginning balance (shares) at Oct. 03, 2020			61,558,000
Beginning balance at Oct. 03, 2020	757,994		$ 539,213	(394,817)	616,119		(2,521)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of stock for services rendered (shares)			8,000
Issuance of stock for services rendered	173		$ 96	77
Repurchase of common stock (shares)			(48,000)
Repurchase of common stock	(1,206)			(1,206)
Issuance of shares for equity based compensation (shares)			535,000
Issuance of shares for equity-based compensation			$ (4,076)	4,076
Equity-based compensation	3,216		$ 3,216
Cash dividend declared	(8,687)				(8,687)
Net income	48,363				48,363
Other comprehensive income	7,763						7,763
Total comprehensive income	56,126				48,363		7,763
Ending balance (shares) at Jan. 02, 2021			62,053,000
Ending balance at Jan. 02, 2021	807,616		$ 538,449	(391,870)	655,795		5,242
Beginning balance (shares) at Oct. 03, 2020			61,558,000
Beginning balance at Oct. 03, 2020	$ 757,994		$ 539,213	(394,817)	616,119		(2,521)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Repurchase of common stock (shares)	(153,000.0)
Repurchase of common stock	$ (6,400)
Net income	233,450
Other comprehensive income	2,861
Total comprehensive income	236,311
Ending balance (shares) at Jul. 03, 2021			61,986,000
Ending balance at Jul. 03, 2021	973,342		$ 546,175	(396,688)	823,515		340
Beginning balance (shares) at Jan. 02, 2021			62,053,000
Beginning balance at Jan. 02, 2021	807,616		$ 538,449	(391,870)	655,795		5,242
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of stock for services rendered (shares)			7,000
Issuance of stock for services rendered	185		$ 130	55
Repurchase of common stock (shares)			(23,000)
Repurchase of common stock	(1,110)			(1,110)
Issuance of shares for equity based compensation (shares)			24,000
Issuance of shares for equity-based compensation			$ (245)	245
Issuance of shares for equity-based compensation	0
Equity-based compensation	3,778		$ 3,778
Cash dividend declared	(8,688)				(8,688)
Net income	71,320				71,320
Other comprehensive income	(6,241)						(6,241)
Total comprehensive income	65,079				71,320		(6,241)
Ending balance (shares) at Apr. 03, 2021			62,061,000
Ending balance at Apr. 03, 2021	866,860		$ 542,112	(392,680)	718,427		(999)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of stock for services rendered (shares)			4,000
Issuance of stock for services rendered	$ 224		$ 185	39
Repurchase of common stock (shares)	(82,000.0)		(82,000)
Repurchase of common stock	$ (4,087)			(4,087)
Issuance of shares for equity based compensation (shares)			3,000
Issuance of shares for equity-based compensation			$ (40)	40
Issuance of shares for equity-based compensation	0
Equity-based compensation	3,918		$ 3,918
Cash dividend declared	(8,678)				(8,678)
Net income	113,766				113,766
Other comprehensive income	1,339						1,339
Total comprehensive income	115,105				113,766		1,339
Ending balance (shares) at Jul. 03, 2021			61,986,000
Ending balance at Jul. 03, 2021	$ 973,342		$ 546,175	$ (396,688)	$ 823,515		$ 340