Annual report pursuant to Section 13 and 15(d)

Leased Properties (Details 1)

v2.4.1.9
Leased Properties (Details 1) (Eastern Interconnect Project [Member], USD $)
In Thousands, unless otherwise specified
1 Months Ended 12 Months Ended
Dec. 31, 2012
Dec. 31, 2014
mi
kV
Dec. 31, 2013
Nov. 30, 2012
Eastern Interconnect Project [Member]
       
Sale Leaseback Transaction [Line Items]        
Length of transmission lines physical assets   216corr_LengthOfTransmissionLinesPhysicalAssets
/ us-gaap_SaleLeasebackTransactionDescriptionAxis
= corr_EasternInterconnectProjectMember
   
Power of transmission lines physical assets   345corr_PowerOfTransmissionLinesPhysicalAssets
/ us-gaap_SaleLeasebackTransactionDescriptionAxis
= corr_EasternInterconnectProjectMember
   
Estimated useful lives of assets   20 years    
Amount of depreciation of leased property $ 190us-gaap_OperatingLeasesIncomeStatementDepreciationExpenseOnPropertySubjectToOrHeldForLease
/ us-gaap_SaleLeasebackTransactionDescriptionAxis
= corr_EasternInterconnectProjectMember
$ 2,300us-gaap_OperatingLeasesIncomeStatementDepreciationExpenseOnPropertySubjectToOrHeldForLease
/ us-gaap_SaleLeasebackTransactionDescriptionAxis
= corr_EasternInterconnectProjectMember
$ 2,300us-gaap_OperatingLeasesIncomeStatementDepreciationExpenseOnPropertySubjectToOrHeldForLease
/ us-gaap_SaleLeasebackTransactionDescriptionAxis
= corr_EasternInterconnectProjectMember
$ 837us-gaap_OperatingLeasesIncomeStatementDepreciationExpenseOnPropertySubjectToOrHeldForLease
/ us-gaap_SaleLeasebackTransactionDescriptionAxis
= corr_EasternInterconnectProjectMember