Business Acquisitions (Schedule Of Allocation Of Purchase Price) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jun. 21, 2013	Apr. 02, 2013	Jul. 03, 2012	Jun. 04, 2012
Business Acquisition [Line Items]
Goodwill	$ 81,721	$ 155,916	$ 100,881
Arada Systems [Member]
Business Acquisition [Line Items]
Property and equipment, net				15
Intangible assets, net				4,040
Goodwill				1,195
Total consideration				5,250
Sierra Wireless AirCard Business [Member]
Business Acquisition [Line Items]
Inventories					2,874
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets					12,256
Property and equipment, net					7,455
Intangible assets, net					69,700
Goodwill					53,841
Liabilities assumed					(6,096)
Total consideration					140,030
Avaak Inc. [Member]
Business Acquisition [Line Items]
Net tangible assets acquired						172
Deferred tax assets, net						5,937
Intangible assets, net						6,000
Goodwill						11,895
Total consideration						24,004
Firetide, Inc. [Member]
Business Acquisition [Line Items]
Intangible assets, net							4,159
Goodwill							3,041
Total consideration							$ 7,200