Segment Information Revenues By Region (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Revenues from External Customers [Line Items]
Revenue, Net	$ 469,092	$ 496,454	$ 1,387,442	$ 1,460,602
United States and Canada [Member]
Revenues from External Customers [Line Items]
Revenue, Net	257,901	237,684	742,927	652,390
Europe, Middle East, and Africa [Member]
Revenues from External Customers [Line Items]
Revenue, Net	166,231	201,673	509,322	641,434
Other [Member]
Revenues from External Customers [Line Items]
Revenue, Net	44,960	57,097	135,193	166,778
Electricity Operating Segment [Member]
Revenues from External Customers [Line Items]
Revenue, Net	$ 206,389	$ 203,441	$ 603,651	$ 567,414