Acquisition (Details) - USD ($)		12 Months Ended
	Feb. 23, 2016	Jul. 31, 2016	Jul. 31, 2015	Jul. 31, 2014
Business Acquisition [Line Items]
Fair value of consideration transferred, net of cash acquired		$ 280,535,000	$ 0	$ 0
Repayments of debt assumed in connection with the acquisition		134,101,000	0	0
Acquisition plan expenses		21,276,000	$ 0	$ 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
Net sales from TCS operations		151,365,000
Operating income, excluding acquisition plan expenses, from TCS operations		$ 3,804,000