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Property and Equipment Property and Equipment (Details) $ in Thousands	1 Months Ended		3 Months Ended
	Sep. 30, 2015 ft²	Jun. 30, 2015 USD ($) ft²	Oct. 03, 2015 USD ($)	Jan. 03, 2015 USD ($)
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Number of Square Feet Purchased | ft²		90,000
Property, Plant and Equipment, Additions		$ 8,500
Property Plant and Equipment, Occupied Square Feet | ft²	78,000
Property, Plant and Equipment, Transfers and Changes			$ 28,300
Property, plant and equipment, gross			191,172	$ 159,036
Accumulated depreciation and amortization			(62,603)	(57,084)
Property and equipment, net			128,569	101,952
Land, Buildings and Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Additions		$ 6,300
Computer equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross			42,305	38,588
Building and improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross			72,738	30,678
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross			23,737	22,894
Computer equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross			14,829	13,035
Tooling
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross			13,178	12,317
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross			7,711	9,912
Furniture and office equipment
Property, Plant and Equipment [Line Items]
Capital Leased Assets, Gross			600	600
Property, plant and equipment, gross			8,713	4,864
Demonstration units
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross			979	972
Vehicles
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross			45	45
Construction-in-progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross			6,937	25,731
Capital Lease Obligations [Member]
Property, Plant and Equipment [Line Items]
Accumulated depreciation and amortization			$ (500)	$ (400)

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Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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