Significant Accounting Policies (Details Textuals) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Significant Accounting Policies [Line Items]
Other Asset Impairment Charges	$ 17,900
Ceiling test write-down	4,939,600	$ 0	$ 0
Amortization of Intangible Assets	$ 2,300	$ 3,600
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