Redeemable Noncontrolling Interests And Subsidiary Acquisitions (Narrative) (Details) (USD $)	6 Months Ended				1 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013 Due in 2013 [Member]	Jun. 30, 2013 Due in 2014 [Member]	Jan. 31, 2012 LPB Energy Management [Member]	Jan. 31, 2012 Internal Use Software [Member] LPB Energy Management [Member]	Jan. 31, 2012 Client Backlog [Member] LPB Energy Management [Member]	Jan. 31, 2012 Assembled Workforce [Member] LPB Energy Management [Member]
Business Acquisition [Line Items]
Cash paid for acquisition					$ 50,600,000
Assets acquired, accounts receivable					2,500,000
Assets acquired, goodwill					34,000,000			1,100,000
Intangible assets acquired					6,300,000	2,500,000	8,200,000
Additional potential purchase price payment			1,000,000	1,500,000
Equity infusion from existing shareholders	3,017,000	3,575,000			20,000,000
Borrowings under committed credit agreement					$ 25,000,000