Segment Information Goodwill by Segment (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Sep. 30, 2018		Jun. 30, 2018	Dec. 31, 2017	Sep. 30, 2017
Segment Reporting, Other Significant Reconciling Item [Line Items]
Goodwill	$ 153,578	$ 154,535	[1]		$ 149,333	$ 131,995
IoT Products & Services Segment
Segment Reporting, Other Significant Reconciling Item [Line Items]
Goodwill	103,973	104,358		$ 104,600
IoT Solutions Segment
Segment Reporting, Other Significant Reconciling Item [Line Items]
Goodwill	$ 49,605	$ 50,177		$ 50,000

[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.