Segment Information Revenues By Region (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Revenues from External Customers [Line Items]
Revenue, Net	$ 496,454	$ 495,491	$ 1,460,602	$ 1,425,202
United States and Canada [Member]
Revenues from External Customers [Line Items]
Revenue, Net	237,684	227,784	652,390	616,555
Europe, Middle East, and Africa [Member]
Revenues from External Customers [Line Items]
Revenue, Net	201,673	208,546	641,434	635,691
Other [Member]
Revenues from External Customers [Line Items]
Revenue, Net	$ 57,097	$ 59,161	$ 166,778	$ 172,956