Acquisitions - ViDi Systems S.A. Purchase Price Allocation (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Apr. 04, 2017
Business Acquisition [Line Items]
Goodwill	$ 243,445	$ 113,208	$ 113,208
ViDi Systems S.A. [Member]
Business Acquisition [Line Items]
Cash				$ 146
Accounts receivable				425
Prepaid expenses and other current assets				129
Property, plant, and equipment				40
Deferred income tax asset				620
Accounts payable				(98)
Accrued expenses				(716)
Deferred income tax liability				(1,008)
Goodwill				18,333
Purchase price				23,015
Non-compete agreements | ViDi Systems S.A. [Member]
Business Acquisition [Line Items]
Finite-lived intangible assets				370
Technology-Based Intangible Assets [Member] | ViDi Systems S.A. [Member]
Business Acquisition [Line Items]
Finite-lived intangible assets				$ 4,774