Vectren Fuels Acquisition (Schedule of Business Acquisition Pro Forma Information) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Revenues [Abstract]
As reported	$ 64,764	$ 34,985	$ 133,910	$ 103,129
Net income applicable to common shareholders
As reported	(5,768)		803
Net Income (Loss) per Share [Abstract]
As reported	$ (0.20)	$ 0.17	$ 0.03	$ 0.65
Vectren Fuels [Member]
Revenues [Abstract]
As reported			140,549	116,058
Pro forma			361,464	335,625
Net income applicable to common shareholders
As reported			826	18,463
Pro forma			$ 33,843	$ 34,877
Net Income (Loss) per Share [Abstract]
As reported			$ 0.03	$ 0.65
Pro forma			$ 1.18	$ 1.22