Goodwill and Other Identifiable Intangible Assets, Net (Additional Information) (Details) $ in Thousands	Jun. 30, 2016 USD ($)	Jun. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)
Goodwill [Line Items]
Number of Reporting Units	1
Goodwill	$ 109,880	$ 131,069	$ 109,448	$ 100,183
M2M
Goodwill [Line Items]
Goodwill		$ 98,600
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount		7.00%
Solutions
Goodwill [Line Items]
Goodwill		$ 32,500
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount		8.00%