Business Combinations (Details) - USD ($) $ / shares in Units, $ in Thousands					3 Months Ended		6 Months Ended
	May 19, 2017	Jan. 20, 2017	Jun. 03, 2016	Apr. 08, 2016	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Business Acquisition [Line Items]
Goodwill					$ 104,430		$ 104,430		$ 82,534
Business acquisition, transaction costs					$ 1,400		$ 1,400
Weighted-average shares used to compute net loss per share - basic and diluted (in shares)					170,419,083	163,838,755	169,585,356	162,952,721
DxContinuum, Inc.
Business Acquisition [Line Items]
Payments to acquire businesses		$ 15,000
Net tangible assets acquired		37
Goodwill		11,159
Net deferred tax liabilities		(2,561)
Total purchase price		15,035
Qlue, Inc.
Business Acquisition [Line Items]
Payments to acquire businesses	$ 6,600
Goodwill	5,000
Net deferred tax liabilities	(1,100)
BrightPoint Security
Business Acquisition [Line Items]
Payments to acquire businesses			$ 19,600
Goodwill			15,258
Net tangible liabilities acquired			(1,339)
Net deferred tax liabilities			(2,890)
Total purchase price			19,629
ITapp
Business Acquisition [Line Items]
Payments to acquire businesses				$ 14,500
Net tangible assets acquired				140
Goodwill				11,437
Net deferred tax liabilities				(2,015)
Total purchase price				14,462
BrightPoint Security and ITapp
Business Acquisition [Line Items]
Business acquisition, transaction costs				1,000
Revenues						$ 341,631		$ 647,898
Net loss						$ (50,674)		$ (386,299)
Weighted-average shares used to compute net loss per share - basic and diluted (in shares)						163,838,755		162,952,721
Net loss per share - basic (in dollars per share)						$ (0.31)		$ (2.37)
Net loss per share - diluted (in dollars per share)						$ (0.31)		$ (2.37)
Developed technology | DxContinuum, Inc.
Business Acquisition [Line Items]
Intangible assets		$ 6,400
Finite-lived intangible asset, useful life		5 years
Developed technology | Qlue, Inc.
Business Acquisition [Line Items]
Intangible assets	$ 2,600
Finite-lived intangible asset, useful life	5 years
Developed technology | BrightPoint Security
Business Acquisition [Line Items]
Intangible assets			$ 8,100
Finite-lived intangible asset, useful life			6 years
Developed technology | ITapp
Business Acquisition [Line Items]
Intangible assets				$ 4,700
Finite-lived intangible asset, useful life				5 years
Customer contracts and related relationships | BrightPoint Security
Business Acquisition [Line Items]
Intangible assets			$ 500
Finite-lived intangible asset, useful life			1 year 6 months
Customer contracts and related relationships | ITapp
Business Acquisition [Line Items]
Intangible assets				$ 200
Finite-lived intangible asset, useful life				1 year 6 months