Business Acquisitions (Schedule Of Allocation Of Purchase Price) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 21, 2013 Arada Systems [Member]	Apr. 02, 2013 Sierra Wireless AirCard Business [Member]	Jul. 03, 2012 Avaak Inc. [Member]	Jun. 04, 2012 Firetide, Inc. [Member]
Business Acquisition [Line Items]
Business Acquisition, Purchase Price Allocation, Net Tangible Assets	$ 15		$ 172
Business Acquisition, Purchase Price Allocation, Current Assets, Inventory		3,385
Business Acquisition, Purchase Price Allocation, Current Assets, Prepaid Expense		9,030
Business Acquisition, Purchase Price Allocation, Current Assets, Other assets		3,226
Business Acquisition, Purchase Price Allocation, Property, Plant and Equipment		7,455
Deferred Tax Assets, Net			5,937
Business Acquisition, Purchase Price Allocation, Intangibles, Net	4,040	69,700	6,000	4,159
Goodwill	1,195	53,330	11,895	3,041
Business Acquisition, Purchase Price Allocation, Liabilities Assumed		(6,096)
Total purchase price allocation	$ 5,250	$ 140,030	$ 24,004	$ 7,200