Segment Information Revenues By Region (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Revenues from External Customers [Line Items]
Revenue, Net	$ 448,247	$ 474,795
United States and Canada [Member]
Revenues from External Customers [Line Items]
Revenue, Net	231,136	200,370
Europe, Middle East, and Africa [Member]
Revenues from External Customers [Line Items]
Revenue, Net	174,654	223,504
Other [Member]
Revenues from External Customers [Line Items]
Revenue, Net	$ 42,457	$ 50,921