Business Combinations BrightPoint Security (Details) - USD ($) $ in Thousands		Jun. 03, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Business Acquisition [Line Items]
Goodwill			$ 82,534	$ 55,669	$ 55,016
BrightPoint Security [Member]
Business Acquisition [Line Items]
Consideration transferred		$ 19,629
Goodwill		15,258
Net tangible liabilities acquired		(1,339)
Net deferred tax liabilities(1)	[1]	(2,890)
Customer Contracts [Member] | BrightPoint Security [Member]
Business Acquisition [Line Items]
Intangible assets:		$ 500
Intangible assets useful life		1 year 6 months
Developed Technology Rights [Member] | BrightPoint Security [Member]
Business Acquisition [Line Items]
Intangible assets:		$ 8,100
Intangible assets useful life		6 years

[1] Deferred tax liabilities, net primarily relates to purchased identifiable intangible assets and is shown net of deferred tax assets.