Segment Information Revenues By Region (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Revenues from External Customers [Line Items]
Revenue, Net		$ 585,890	$ 503,082	$ 1,193,111	$ 980,674
United States and Canada [Member]
Revenues from External Customers [Line Items]
Revenue, Net		348,101	295,737	704,033	564,834
Europe, Middle East, and Africa [Member]
Revenues from External Customers [Line Items]
Revenue, Net		184,748	158,766	386,822	321,581
Other [Member]
Revenues from External Customers [Line Items]
Revenue, Net	[1]	$ 53,041	$ 48,579	$ 102,256	$ 94,259

[1] The Other region includes our operations in Latin America and Asia Pacific.