Fair Value Measurements (Contingent Consideration Liabilities) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Business Acquisition [Line Items]
Contingent consideration, beginning balance	$ 1,575	$ 8,400
Contingent consideration at acquisition		2,100
Payment of contingent consideration	(1,575)	(8,925)
Contingent consideration, ending balance	0	1,575
Kepware [Member]
Business Acquisition [Line Items]
Contingent consideration, beginning balance	0	8,400
Contingent consideration at acquisition		0
Payment of contingent consideration	0	(8,400)
Contingent consideration, ending balance	0	0
Other [Member]
Business Acquisition [Line Items]
Contingent consideration, beginning balance	1,575	0
Contingent consideration at acquisition		2,100
Payment of contingent consideration	(1,575)	(525)
Contingent consideration, ending balance	$ 0	$ 1,575