Acquisitions - Narrative (Details) - USD ($) $ in Thousands		1 Months Ended		3 Months Ended
	Oct. 26, 2016	Aug. 31, 2016	Jun. 30, 2016	Sep. 30, 2016	Sep. 30, 2015
Business Acquisition [Line Items]
Cash paid				$ 5,400	$ 0
Goodwill			$ 23,438	$ 25,278
Effective income tax rate (as a percent)				36.10%	34.80%
Acquisition of Technology and Trademarks
Business Acquisition [Line Items]
Consideration transferred		$ 6,000
Cash paid		5,400
Future contingent consideration payment		600
Goodwill		$ 2,000
Finite-lived intangible asset, useful life		6 years
Fidelis Group, LLC
Business Acquisition [Line Items]
Cash paid			8,000
Future contingent consideration payment			$ 2,000
Goodwill				$ 6,706
Weighted average discount rate (as a percent)				18.00%
Effective income tax rate (as a percent)				34.00%
Developed Technology Rights | Acquisition of Technology and Trademarks
Business Acquisition [Line Items]
Finite-lived intangible assets acquired		$ 4,000
Developed Technology Rights | Fidelis Group, LLC
Business Acquisition [Line Items]
Finite-lived intangible assets acquired				$ 1,272
Finite-lived intangible asset, useful life				10 years
In Process Research and Development | Fidelis Group, LLC
Business Acquisition [Line Items]
Finite-lived intangible assets acquired				$ 3,097
Finite-lived intangible asset, useful life				11 years
Customer Relationship | Fidelis Group, LLC
Business Acquisition [Line Items]
Finite-lived intangible assets acquired				$ 753
Finite-lived intangible asset, useful life				8 years
Subsequent Event | Mtelligence Corporation
Business Acquisition [Line Items]
Consideration transferred	$ 37,400
Cash paid	31,900
Future contingent consideration payment	$ 5,500