Discontinued Operations Summary of Income Statement Information (Details) (USD $)	3 Months Ended		12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax			$ 69,700,000
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	0	1,023,000
Transaction expenses withheld from proceeds			(5,390,000)
Revenues		44,384,000
Transaction expenses and accelerated employee benefits (2)			11,000,000
Income before income taxes		2,409,000
Income tax expense		894,000
Net income from discontinued operations	0	1,515,000
Net income attributable to noncontrolling interests	(13,000)	(482,000)
Ecova [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Transaction expenses and accelerated employee benefits (2)			9,062,000
Net income attributable to noncontrolling interests		$ (492,000)