Fair Value Measurements (Changes in Fair Value of Level 3 Contingent Consideration Liability (Details) - USD ($) $ in Thousands	6 Months Ended
	Mar. 30, 2019	Mar. 31, 2018
Business Combination. Contingent Consideration [Roll Forward]
Beginning balance	$ 1,575
Payment of contingent consideration	(1,600)	$ (3,800)
Ending balance	0
Level 3
Business Combination. Contingent Consideration [Roll Forward]
Beginning balance	1,575	8,400
Addition to contingent consideration		2,100
Payment of contingent consideration		(3,757)
Ending balance	0	6,743
Kepware | Level 3
Business Combination. Contingent Consideration [Roll Forward]
Beginning balance		8,400
Addition to contingent consideration		0
Payment of contingent consideration		(3,757)
Ending balance		4,643
Other | Level 3
Business Combination. Contingent Consideration [Roll Forward]
Beginning balance	1,575	0
Addition to contingent consideration		2,100
Payment of contingent consideration	(1,575)	0
Ending balance	$ 0	$ 2,100