Consolidated Condensed Statements of Earnings - USD ($) $ in Thousands	3 Months Ended
	Dec. 28, 2019	Dec. 29, 2018
Income Statement [Abstract]
Net sales	$ 754,843	$ 679,676
Cost of sales	543,586	480,174
Gross profit	211,257	199,502
Research and development	28,208	31,876
Selling, general and administrative	98,367	96,326
Interest	10,232	9,682
Other	7,546	5,135
Earnings before income taxes	66,904	56,483
Income taxes	16,877	13,714
Net earnings	$ 50,027	$ 42,769
Net earnings per share
Basic	$ 1.45	$ 1.23
Diluted	1.44	1.22
Dividends declared per share	$ 0.25	$ 0.25
Average common shares outstanding
Basic	34,510,851	34,815,255
Diluted	34,787,404	35,125,829