Segment Information Goodwill by Segment (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2016	Sep. 30, 2016
Segment Reporting, Other Significant Reconciling Item [Line Items]
Goodwill	$ 149,333	$ 131,995		$ 111,116	$ 109,448
IoT Products & Services
Segment Reporting, Other Significant Reconciling Item [Line Items]
Goodwill	99,063	98,981	$ 98,600
IoT Solutions
Segment Reporting, Other Significant Reconciling Item [Line Items]
Goodwill	$ 50,270	$ 33,014	$ 32,500