Acquisition (Summary of Assets Acquired and Liabilities Assumed) (Details) - USD ($)		Feb. 23, 2016	Jul. 31, 2016	Jul. 31, 2015
Business Acquisition [Line Items]
Goodwill			$ 287,618,000	$ 137,354,000
TeleCommunication Systems, Inc.
Business Acquisition [Line Items]
Aggregate purchase price at fair value		$ 340,432,000
Goodwill			$ 150,264,000
Preliminary Purchase Price Allocation | TeleCommunication Systems, Inc.
Business Acquisition [Line Items]
Shares of TCS common stock purchased	[1]	318,605,000
Stock-based awards settled	[1]	21,827,000
Aggregate purchase price at fair value	[1]	340,432,000
Cash and cash equivalents	[1]	59,897,000
Current assets	[1]	115,797,000
Deferred tax assets, net, non-current	[1]	72,700,000
Property, plant and equipment	[1]	26,720,000
Other assets, non-current	[1]	2,641,000
Current liabilities (excluding interest accrued on debt)	[1]	(87,700,000)
Debt (including interest accrued)	[1]	(134,101,000)
Capital lease obligations	[1]	(8,993,000)
Other liabilities	[1]	(9,156,000)
Net tangible assets at fair value	[1]	37,805,000
Deferred tax liabilities	[1]	(105,422,000)
Goodwill	[1]	127,149,000
Allocation of aggregate purchase price	[1]	340,432,000
Preliminary Purchase Price Allocation | Customer relationships and backlog | TeleCommunication Systems, Inc.
Business Acquisition [Line Items]
Intangible assets	[1]	225,900,000
Preliminary Purchase Price Allocation | Trade names | TeleCommunication Systems, Inc.
Business Acquisition [Line Items]
Intangible assets	[1]	20,000,000
Preliminary Purchase Price Allocation | Technology | TeleCommunication Systems, Inc.
Business Acquisition [Line Items]
Intangible assets	[1]	35,000,000
Measurement Period Adjustments | TeleCommunication Systems, Inc.
Business Acquisition [Line Items]
Current assets	[2]	(130,000)
Deferred tax assets, net, non-current	[2]	10,820,000
Current liabilities (excluding interest accrued on debt)	[2]	(32,056,000)
Net tangible assets at fair value	[2]	(21,366,000)
Deferred tax liabilities	[2]	1,051,000
Goodwill	[2]	23,115,000
Measurement Period Adjustments | Customer relationships and backlog | TeleCommunication Systems, Inc.
Business Acquisition [Line Items]
Intangible assets	[2]	(2,800,000)
Purchase Price Allocation (as adjusted) | TeleCommunication Systems, Inc.
Business Acquisition [Line Items]
Shares of TCS common stock purchased		318,605,000
Stock-based awards settled		21,827,000
Aggregate purchase price at fair value		340,432,000
Cash and cash equivalents		59,897,000
Current assets		115,667,000
Deferred tax assets, net, non-current		83,520,000
Property, plant and equipment		26,720,000
Other assets, non-current		2,641,000
Current liabilities (excluding interest accrued on debt)		(119,756,000)
Debt (including interest accrued)		(134,101,000)
Capital lease obligations		(8,993,000)
Other liabilities		(9,156,000)
Net tangible assets at fair value		16,439,000
Deferred tax liabilities		(104,371,000)
Goodwill		150,264,000
Allocation of aggregate purchase price		340,432,000
Purchase Price Allocation (as adjusted) | Customer relationships and backlog | TeleCommunication Systems, Inc.
Business Acquisition [Line Items]
Intangible assets		$ 223,100,000
Estimated Useful Lives		21 years
Purchase Price Allocation (as adjusted) | Trade names | TeleCommunication Systems, Inc.
Business Acquisition [Line Items]
Intangible assets		$ 20,000,000
Purchase Price Allocation (as adjusted) | Technology | TeleCommunication Systems, Inc.
Business Acquisition [Line Items]
Intangible assets		$ 35,000,000
Minimum [Member] | Purchase Price Allocation (as adjusted) | Trade names | TeleCommunication Systems, Inc.
Business Acquisition [Line Items]
Estimated Useful Lives		10 years
Minimum [Member] | Purchase Price Allocation (as adjusted) | Technology | TeleCommunication Systems, Inc.
Business Acquisition [Line Items]
Estimated Useful Lives		5 years
Maximum [Member] | Purchase Price Allocation (as adjusted) | Trade names | TeleCommunication Systems, Inc.
Business Acquisition [Line Items]
Estimated Useful Lives		20 years
Maximum [Member] | Purchase Price Allocation (as adjusted) | Technology | TeleCommunication Systems, Inc.
Business Acquisition [Line Items]
Estimated Useful Lives		15 years

[1] As initially reported in the Company's Quarterly Report on Form 10-Q for the three and nine months ended April 30, 2016.

[2] Principally relate to (i) an increase in the estimated fair value of contingent liabilities associated with TCS’s intellectual property matters, as discussed in more detail in Note (14) (b) - "Commitments and Contingencies - Legal Proceedings and Other Matters"; (ii) an increase in the preliminary estimate of fair value at the date of acquisition of the contingent liability related to the warranty obligations for our 911 call handling software that was assumed by the Company upon acquisition; (iii) revisions to the estimated fair value of intangible assets; and (iv) the related adjustments to deferred income taxes. These measurement period adjustments were recorded to better reflect estimated fair values of the assets acquired and the liabilities assumed in connection with the TCS acquisition based on facts and circumstances that existed as of the acquisition date.