Business Acquisitions (Schedule Of Allocation Of Purchase Price) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 29, 2013	Dec. 31, 2012	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 Combination,Recognized Identifiable Assets aquired and Liabilities Assumed, net tangible assets aquired (liabilities assumed)					$ 172
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets Noncurrent					5,937
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory				2,874
Business Acquisition, Purchase Price Allocation, Current Assets, Prepaid Expense				9,030
Business Acquisition, Purchase Price Allocation, Current Assets, Other assets				3,226
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment			15	7,455
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill			4,040	69,700	6,000	4,159
Goodwill	155,916	100,880	1,195	53,841	11,895	3,041
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities				6,096
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Less Noncontrolling Interest			$ 5,250	$ 140,030	$ 24,004	$ 7,200