Acquisition (Details) - USD ($)		3 Months Ended			9 Months Ended
	Feb. 23, 2016	Jul. 31, 2016	Apr. 30, 2016	Apr. 30, 2015	Apr. 30, 2016	Apr. 30, 2015
Business Acquisition [Line Items]
Fair value of consideration transferred, net of cash acquired					$ 280,535,000	$ 0
Repayments of debt assumed in connection with the acquisition					134,101,000	0
Acquisition plan expenses			$ 16,960,000	$ 0	20,689,000	$ 0
Secured Credit Facility
Business Acquisition [Line Items]
Line of Credit Facility, maximum borrowing capacity	$ 400,000,000
TeleCommunication Systems, Inc.
Business Acquisition [Line Items]
Preliminary aggregate purchase price	340,432,000
Enterprise value	423,629,000
Fair value of consideration transferred, net of cash acquired	280,535,000
Cash acquired from the acquisition	59,897,000
Transaction and merger related expenditures	$ 48,000,000
Acquisition plan expenses			16,960,000		20,689,000
Revenue since acquisition			$ 65,957,000		$ 65,957,000
TeleCommunication Systems, Inc. | Scenario, Forecast [Member]
Business Acquisition [Line Items]
Acquisition plan expenses		$ 3,900,000