Restructuring Restructuring Expected Costs, Costs To-Date, Remaining Costs, and Costs During the Period - 2011 Projects (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended						15 Months Ended	9 Months Ended	15 Months Ended	9 Months Ended	15 Months Ended	9 Months Ended	15 Months Ended	9 Months Ended	15 Months Ended	9 Months Ended	15 Months Ended	9 Months Ended	15 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013 Employee severance costs	Sep. 30, 2013 Asset Impairment and Net (Gain) Loss on Sale or Disposal [Member]	Sep. 30, 2013 Other restructuring costs	Sep. 30, 2013 2011 Project [Member]	Dec. 31, 2012 2011 Project [Member]	Sep. 30, 2013 2011 Project [Member] Employee severance costs	Dec. 31, 2012 2011 Project [Member] Employee severance costs	Sep. 30, 2013 2011 Project [Member] Asset Impairment and Net (Gain) Loss on Sale or Disposal [Member]	Dec. 31, 2012 2011 Project [Member] Asset Impairment and Net (Gain) Loss on Sale or Disposal [Member]	Sep. 30, 2013 2011 Project [Member] Other restructuring costs	Dec. 31, 2012 2011 Project [Member] Other restructuring costs	Sep. 30, 2013 2011 Project [Member] Energy [Member]	Dec. 31, 2012 2011 Project [Member] Energy [Member]	Sep. 30, 2013 2011 Project [Member] Water [Member]	Dec. 31, 2012 2011 Project [Member] Water [Member]	Sep. 30, 2013 2011 Project [Member] Corporate Unallocated [Member]	Dec. 31, 2012 2011 Project [Member] Corporate Unallocated [Member]
Restructuring Cost and Reserve [Line Items]
Total expected costs at period end								$ 74,145		$ 46,850		$ 20,332		$ 6,963		$ 53,385		$ 15,675		$ 5,085
Costs Recognized in Prior Periods									69,747		44,196		20,305		5,246		53,190		14,556		2,001
Costs recognized during the period ended	28,379	(5,054)	32,777	3,455	30,805	27	1,945	4,398		2,654		27		1,717		195		1,119		3,084
Remaining Costs to be Recognized at Period End								$ 0		$ 0		$ 0		$ 0		$ 0		$ 0		$ 0