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Business Acquisitions (Narrative) (Details) (USD $)
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3 Months Ended | 9 Months Ended | 9 Months Ended | 0 Months Ended | 9 Months Ended | 0 Months Ended | 0 Months Ended | 0 Months Ended | 0 Months Ended | 0 Months Ended | 9 Months Ended | 0 Months Ended | 9 Months Ended | 0 Months Ended | |||||||||||||||||||||||||||||
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Sep. 29, 2013
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Sep. 30, 2012
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Sep. 29, 2013
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Sep. 30, 2012
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Dec. 31, 2012
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Sep. 29, 2013
Arada Systems [Member]
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Jun. 21, 2013
Arada Systems [Member]
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Jun. 23, 2013
Arada Systems [Member]
Technology [Member]
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Jun. 21, 2013
Arada Systems [Member]
Technology [Member]
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Jun. 21, 2013
Arada Systems [Member]
US Federal [Member]
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Jun. 21, 2013
Arada Systems [Member]
State and Local Jurisdiction [Member]
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Sep. 29, 2013
Sierra Wireless AirCard Business [Member]
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Apr. 02, 2013
Sierra Wireless AirCard Business [Member]
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Apr. 04, 2013
Sierra Wireless AirCard Business [Member]
In-Process Research and Development [Member]
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Sep. 29, 2013
Sierra Wireless AirCard Business [Member]
In-Process Research and Development [Member]
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Apr. 02, 2013
Sierra Wireless AirCard Business [Member]
In-Process Research and Development [Member]
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Apr. 04, 2013
Sierra Wireless AirCard Business [Member]
Technology [Member]
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Sep. 29, 2013
Sierra Wireless AirCard Business [Member]
Technology [Member]
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Apr. 02, 2013
Sierra Wireless AirCard Business [Member]
Technology [Member]
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Apr. 04, 2013
Sierra Wireless AirCard Business [Member]
Customer Relationships [Member]
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Apr. 02, 2013
Sierra Wireless AirCard Business [Member]
Customer Relationships [Member]
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Apr. 04, 2013
Sierra Wireless AirCard Business [Member]
Noncompete Agreements [Member]
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Apr. 02, 2013
Sierra Wireless AirCard Business [Member]
Noncompete Agreements [Member]
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Apr. 04, 2013
Sierra Wireless AirCard Business [Member]
Order Backlog [Member]
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Apr. 02, 2013
Sierra Wireless AirCard Business [Member]
Order Backlog [Member]
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Apr. 02, 2013
Sierra Wireless AirCard Business [Member]
US Federal [Member]
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Apr. 02, 2013
Sierra Wireless AirCard Business [Member]
Foreign Tax Authority [Member]
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Apr. 02, 2013
Sierra Wireless AirCard Business [Member]
State and Local Jurisdiction [Member]
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Sep. 29, 2013
Avaak Inc. [Member]
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Sep. 30, 2012
Avaak Inc. [Member]
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Jul. 03, 2012
Avaak Inc. [Member]
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Jul. 03, 2012
Avaak Inc. [Member]
In-Process Research and Development [Member]
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Jul. 03, 2012
Avaak Inc. [Member]
Technology [Member]
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Jul. 03, 2012
Avaak Inc. [Member]
Customer Relationships [Member]
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Jul. 03, 2012
Avaak Inc. [Member]
Trade Names and Trademarks [Member]
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Jul. 03, 2012
Avaak Inc. [Member]
US Federal [Member]
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Jul. 03, 2012
Avaak Inc. [Member]
State and Local Jurisdiction [Member]
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Sep. 29, 2013
Firetide, Inc. [Member]
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Sep. 30, 2012
Firetide, Inc. [Member]
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Jun. 04, 2012
Firetide, Inc. [Member]
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Jun. 04, 2012
Firetide, Inc. [Member]
Technology [Member]
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Jun. 04, 2012
Firetide, Inc. [Member]
US Federal [Member]
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Jun. 04, 2012
Firetide, Inc. [Member]
State and Local Jurisdiction [Member]
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| Business Acquisition [Line Items] | |||||||||||||||||||||||||||||||||||||||||||
| Business Combination, Consideration Transferred | $ 5,250,000 | $ 140,000,000 | $ 24,000,000 | $ 7,200,000 | |||||||||||||||||||||||||||||||||||||||
| Goodwill, Purchase Accounting Adjustments | 500,000 | ||||||||||||||||||||||||||||||||||||||||||
| Business Acquisition, Percentage of Voting Interests Acquired | 100.00% | ||||||||||||||||||||||||||||||||||||||||||
| Purchase price, cash paid | 4,200,000 | 2,400,000 | 21,600,000 | 600,000 | 6,600,000 | ||||||||||||||||||||||||||||||||||||||
| Business Acquisition Cost of Acquired Entity, Cash To Be Paid At Future Date | 1,100,000 | ||||||||||||||||||||||||||||||||||||||||||
| Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill | 4,040,000 | 4,000,000 | 69,700,000 | 9,500,000 | 16,300,000 | 40,500,000 | 2,300,000 | 1,100,000 | 6,000,000 | 2,000,000 | 2,300,000 | 300,000 | 1,400,000 | 4,159,000 | |||||||||||||||||||||||||||||
| Goodwill | 155,916,000 | 155,916,000 | 100,880,000 | 1,195,000 | 53,841,000 | 11,895,000 | 3,041,000 | ||||||||||||||||||||||||||||||||||||
| Business Acquisition, Goodwill, Expected Tax Deductible Amount | 700,000 | 1,200,000 | 36,600,000 | 2,300,000 | 53,800,000 | 0 | 0 | 1,600,000 | 3,000,000 | ||||||||||||||||||||||||||||||||||
| Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets Noncurrent | 5,937,000 | ||||||||||||||||||||||||||||||||||||||||||
| Discount rate used to calculate present value of future cash flows ( in percentage) | 21.50% | 13.00% | 10.00% | 12.00% | 12.00% | 10.00% | 14.00% | 14.00% | 16.00% | 22.00% | |||||||||||||||||||||||||||||||||
| Acquired intangible assets, estimated useful life ( in years) | 5 years | 4 years | 4 years | 8 years | 5 years | 5 years | 5 years | 5 years | 5 years | ||||||||||||||||||||||||||||||||||
| In Process Research and Development achieving technological feasibility | 7,400,000 | 7,400,000 | |||||||||||||||||||||||||||||||||||||||||
| IPR&D Reaching Technical Feasibility Useful Life | 4 years | ||||||||||||||||||||||||||||||||||||||||||
| Impairment charges | 2,000,000 | 0 | 2,000,000 | 0 | 2,000,000 | ||||||||||||||||||||||||||||||||||||||
| Indefinite-Lived Intangible Assets (Excluding Goodwill) | $ 100,000 | $ 100,000 | $ 1,000,000 | $ 100,000 | |||||||||||||||||||||||||||||||||||||||