Consolidated Statements of Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Dec. 29, 2018	Dec. 30, 2017
Income Statement [Abstract]
Net sales	$ 765,544	$ 677,294
Cost of sales	693,161	613,771
Gross profit	72,383	63,523
Selling and administrative expenses	35,432	31,966
Operating income	36,951	31,557
Other income (expense):
Interest expense	(2,249)	(3,725)
Interest income	525	1,555
Miscellaneous, net	(1,112)	(346)
Income before income taxes	34,115	29,041
Income tax expense	11,889	127,534
Net income (loss)	$ 22,226	$ (98,493)
Earnings (loss) per share:
Basic (in dollars per share)	$ 0.71	$ (2.93)
Diluted (in dollars per share)	$ 0.69	$ (2.93)
Weighted average shares outstanding:
Basic (in shares)	31,403	33,567
Diluted (in shares)	32,286	33,567
Other comprehensive income (loss):
Derivative instrument fair value adjustment	$ 378	$ 1,539
Foreign currency translation adjustments	(1,871)	2,142
Other comprehensive income (loss)	(1,493)	3,681
Total comprehensive income (loss)	$ 20,733	$ (94,812)