Segment Information Revenues By Region (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Revenues from External Customers [Line Items]
Revenue, Net	$ 489,353	$ 482,175	$ 964,148	$ 929,711
United States and Canada [Member]
Revenues from External Customers [Line Items]
Revenue, Net	214,336	211,565	414,706	388,771
Europe, Middle East, and Africa [Member]
Revenues from External Customers [Line Items]
Revenue, Net	216,257	215,250	439,761	427,145
Other [Member]
Revenues from External Customers [Line Items]
Revenue, Net	$ 58,760	$ 55,360	$ 109,681	$ 113,795