Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 26, 2020	Jun. 28, 2019	Jun. 26, 2020	Jun. 28, 2019
Income Statement [Abstract]
Net sales	$ 384,899	$ 493,491	$ 1,288,001	$ 1,414,828
Cost of sales	289,086	367,357	943,741	1,061,350
Gross profit	95,813	126,134	344,260	353,478
Selling, general and administrative	46,159	59,049	164,734	171,778
Intangible asset amortization	8,026	7,868	24,210	24,278
Operating income	41,628	59,217	155,316	157,422
Interest expense, net	9,421	12,789	30,605	38,277
Other income, net	(543)	(1,228)	(2,462)	(3,422)
Income before income taxes	32,750	47,656	127,173	122,567
Income tax expense	8,672	11,106	29,112	29,513
Net income	$ 24,078	$ 36,550	$ 98,061	$ 93,054
Net income per share
Basic (in dollars per share)	$ 0.50	$ 0.77	$ 2.03	$ 1.95
Diluted (in dollars per share)	$ 0.49	$ 0.75	$ 1.99	$ 1.90