Business Acquisitions (Narrative) (Details) - USD ($) $ in Thousands			3 Months Ended			12 Months Ended
	Jun. 23, 2013	Apr. 04, 2013	Jun. 29, 2014	Sep. 29, 2013	Jun. 30, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Jun. 21, 2013	Apr. 02, 2013
Business Acquisition [Line Items]
Goodwill						$ 81,721	$ 81,721	$ 155,916
Intangibles Impairment charges						0	0	2,000
Amortization of Intangible Assets						$ 17,300	$ 17,900	15,500
Arada Systems [Member]
Business Acquisition [Line Items]
Total purchase price					$ 5,250
Purchase price, cash paid			$ 1,100		4,200
Intangible assets, net									$ 4,040
Goodwill									1,195
Arada Systems [Member] | Technology [Member]
Business Acquisition [Line Items]
Intangible assets, net									4,000
Discount rate used to calculate present value of future cash flows ( in percentage)	21.50%
Acquired intangible assets, estimated useful life ( in years)	5 years
Arada Systems [Member] | US Federal [Member]
Business Acquisition [Line Items]
Business Acquisition, Goodwill, Expected Tax Deductible Amount									700
Arada Systems [Member] | State and Local Jurisdiction [Member]
Business Acquisition [Line Items]
Business Acquisition, Goodwill, Expected Tax Deductible Amount									$ 1,200
Sierra Wireless AirCard Business [Member]
Business Acquisition [Line Items]
Total purchase price					$ 140,030
Goodwill, Purchase Accounting Adjustments				$ 500
Intangible assets, net										$ 69,700
Goodwill										53,841
Intangibles Impairment charges								$ 2,000
Sierra Wireless AirCard Business [Member] | In-Process Research and Development [Member]
Business Acquisition [Line Items]
Intangible assets, net										9,500
Discount rate used to calculate present value of future cash flows ( in percentage)		13.00%
Sierra Wireless AirCard Business [Member] | Technology [Member]
Business Acquisition [Line Items]
Intangible assets, net										16,300
Discount rate used to calculate present value of future cash flows ( in percentage)		10.00%
Acquired intangible assets, estimated useful life ( in years)		4 years
In Process Research and Development achieving technological feasibility			$ 7,500
Sierra Wireless AirCard Business [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Intangible assets, net										40,500
Discount rate used to calculate present value of future cash flows ( in percentage)		12.00%
Acquired intangible assets, estimated useful life ( in years)		8 years
Sierra Wireless AirCard Business [Member] | Noncompete Agreements [Member]
Business Acquisition [Line Items]
Intangible assets, net										2,300
Discount rate used to calculate present value of future cash flows ( in percentage)		12.00%
Acquired intangible assets, estimated useful life ( in years)		5 years
Sierra Wireless AirCard Business [Member] | Order Backlog [Member]
Business Acquisition [Line Items]
Intangible assets, net										1,100
Discount rate used to calculate present value of future cash flows ( in percentage)		10.00%
Sierra Wireless AirCard Business [Member] | US Federal [Member]
Business Acquisition [Line Items]
Business Acquisition, Goodwill, Expected Tax Deductible Amount										35,800
Sierra Wireless AirCard Business [Member] | Canadian [Member]
Business Acquisition [Line Items]
Business Acquisition, Goodwill, Expected Tax Deductible Amount										2,300
Sierra Wireless AirCard Business [Member] | State and Local Jurisdiction [Member]
Business Acquisition [Line Items]
Business Acquisition, Goodwill, Expected Tax Deductible Amount										$ 53,800