Goodwill and Other Identifiable Intangible Assets, Net (Goodwill Rollforward) (Details) $ in Thousands	6 Months Ended
	Mar. 31, 2019 USD ($)
Goodwill [Roll Forward]
Beginning balance	$ 154,535	[1]
Acquisitions	0
Foreign currency translation adjustment	(486)
Ending balance	154,049
IoT Solutions Segment
Goodwill [Roll Forward]
Beginning balance	50,177
Acquisitions	0
Foreign currency translation adjustment	(364)
Ending balance	49,813
IoT Products & Services Segment
Goodwill [Roll Forward]
Beginning balance	104,358
Acquisitions	0
Foreign currency translation adjustment	(122)
Ending balance	$ 104,236

[1] Prior period information has been restated for the adoption of ASU No. 2014-09, “Revenue from Contracts with Customers (Topic 606),” which we adopted on October 1, 2018.