Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 27, 2020	Mar. 29, 2019	Mar. 27, 2020	Mar. 29, 2019
Income Statement [Abstract]
Net sales	$ 455,654	$ 469,309	$ 903,102	$ 921,337
Cost of sales	324,051	352,221	654,655	693,993
Gross profit	131,603	117,088	248,447	227,344
Selling, general and administrative	62,360	56,350	118,575	112,729
Intangible asset amortization	8,071	8,196	16,184	16,410
Operating income	61,172	52,542	113,688	98,205
Interest expense, net	10,564	13,328	21,184	25,488
Other income, net	(1,685)	(594)	(1,919)	(2,194)
Income before income taxes	52,293	39,808	94,423	74,911
Income tax expense	13,100	10,253	20,440	18,407
Net income	$ 39,193	$ 29,555	$ 73,983	$ 56,504
Net income per share
Basic (in dollars per share)	$ 0.81	$ 0.62	$ 1.53	$ 1.18
Diluted (in dollars per share)	$ 0.80	$ 0.61	$ 1.50	$ 1.15