Sale of Operating Assets and Discontinued Operations Discontinued Operations (Details) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012		Dec. 31, 2011
Significant Acquisitions and Disposals [Line Items]
Proceeds from sale of business operations									$ 0	$ 107,511,000		$ 0
Income (loss) from discontinued operations, net of tax									(884,000)	(6,977,000)		9,365,000
Income (loss) from discontinued operations, net of tax	(884,000)	0	0	0	(167,000)	(166,000)	(1,160,000)	(5,484,000)
Business Exit Costs										2,500,000
Energy Marketing [Member]
Significant Acquisitions and Disposals [Line Items]
Disposal Date										Feb. 29, 2012
Proceeds from sale of business operations										108,000,000
Funds Retained, Sale of Business										58,000,000
Disposal Group, Including Discontinued Operation, Revenue									0	(604,000)		41,101,000
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax									0	(6,061,000)		14,838,000
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax									(1,391,000)	(4,184,000)		0
Discontinued Operation, Tax Effect of Discontinued Operation									507,000	3,268,000		(5,473,000)
Income (loss) from discontinued operations, net of tax									(884,000)	(6,977,000)	[1]	9,365,000
Minimum [Member] | Energy Marketing [Member]
Significant Acquisitions and Disposals [Line Items]
Post Close Adjustment									$ 1,100,000	$ 1,400,000

[1] 2012 includes transaction related costs, net of tax, of $2.5 million for the year ended Dec. 31, 2012.