Consolidated Condensed Statements of Earnings - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 30, 2019	Mar. 31, 2018	Mar. 30, 2019	Mar. 31, 2018
Income Statement [Abstract]
Net sales	$ 718,811	$ 689,049	$ 1,398,487	$ 1,316,584
Cost of sales	521,410	488,788	1,001,584	931,938
Inventory write-down - restructuring	0	7,329	0	7,329
Gross profit	197,401	192,932	396,903	377,317
Research and development	31,344	33,995	63,220	66,329
Selling, general and administrative	99,860	98,665	196,186	193,284
Interest	9,939	9,089	19,621	17,735
Restructuring	0	24,058	0	24,058
Other	640	1,456	4,074	2,408
Earnings before income taxes	55,618	25,669	113,802	73,503
Income taxes	13,259	11,704	27,374	58,239
Net earnings	$ 42,359	$ 13,965	$ 86,428	$ 15,264
Net earnings per share
Basic	$ 1.21	$ 0.39	$ 2.48	$ 0.43
Diluted	1.20	0.39	2.46	0.42
Dividends declared per share	$ 0.25	$ 0.25	$ 0.50	$ 0.25
Average common shares outstanding
Basic	34,886,541	35,770,089	34,850,898	35,771,247
Diluted	35,241,113	36,179,858	35,183,471	36,190,455