Commitments and Contingencies (Details 3) - USD ($) $ in Millions			12 Months Ended
	Sep. 08, 2014	Feb. 25, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008	Dec. 31, 2007
Goldman, Sachs & Co. vs CVR
Loss Contingencies [Line Items]
Litigation settlement	$ 22.6
Deutsche Bank vs CVR
Loss Contingencies [Line Items]
Litigation settlement	$ 22.7
Litigation \| CRNF
Loss Contingencies [Line Items]
Property tax abatement period								10 years
Increase in property tax expenses			$ 11.3	$ 11.4	$ 11.7	$ 10.7	$ 10.7
Decrease in property tax expenses		$ 10.7
Tax exemption period		10 years