Significant Accounting Policies (Details Textuals) (USD $) Share data in Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Significant Accounting Policies [Line Items]
Ceiling test write-down	$ 0	$ 0	$ 0
Impairment of Goodwill	0	0	0
Antidilutive Securities Excluded from Computation of Earnings Per Share, Total	3.6	4.1	5.0
Amortization of Intangible Assets	$ 1,300,000
Minimum [Member] | Co2 Property And Pipelines [Member]
Significant Accounting Policies [Line Items]
Estimated useful lives	15 years
Minimum [Member] | Riley Ridge gas processing facility [Member]
Significant Accounting Policies [Line Items]
Estimated useful lives	20 years
Minimum [Member] | Vehicles and furniture and fixtures [Member]
Significant Accounting Policies [Line Items]
Estimated useful lives	5 years
Minimum [Member] | Computer equipment and software [Member]
Significant Accounting Policies [Line Items]
Estimated useful lives	3 years
Maximum [Member] | Co2 Property And Pipelines [Member]
Significant Accounting Policies [Line Items]
Estimated useful lives	50 years
Maximum [Member] | Riley Ridge gas processing facility [Member]
Significant Accounting Policies [Line Items]
Estimated useful lives	50 years
Maximum [Member] | Vehicles and furniture and fixtures [Member]
Significant Accounting Policies [Line Items]
Estimated useful lives	10 years
Maximum [Member] | Computer equipment and software [Member]
Significant Accounting Policies [Line Items]
Estimated useful lives	5 years