Annual report pursuant to Section 13 and 15(d)

MORTGAGE LOANS ON REAL ESTATE (Details)

v2.4.1.9
MORTGAGE LOANS ON REAL ESTATE (Details) (USD $)
 12 Months Ended
Dec. 31, 2014
Mortgage Loans on Real Estate [Line Items]  
Face Value $ 20,300,000us-gaap_MortgageLoansOnRealEstateFaceAmountOfMortgages
Carrying Amount of Mortgage 20,435,170us-gaap_MortgageLoansOnRealEstateCarryingAmountOfMortgages
Principal Amount of Loans Subject to Delinquent Principal or Interest 0us-gaap_MortgageLoansOnRealEstatePrincipalAmountOfDelinquentLoans
Interest Rate Increase From Previous Year 2.00%corr_InterestRateIncreaseFromPreviousYear
Cambell County Wyoming [Member] | First Mortgage [Member]  
Mortgage Loans on Real Estate [Line Items]  
Interest Rate 12.00%us-gaap_MortgageLoansOnRealEstateInterestRate
/ us-gaap_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis
= us-gaap_FirstMortgageMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= corr_CambellCountyWyomingMember
Monthly Payment Amount (2) 127,508corr_MortgageLoansonRealEstateMonthlyPaymentAmount
/ us-gaap_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis
= us-gaap_FirstMortgageMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= corr_CambellCountyWyomingMember
Face Value 12,000,000us-gaap_MortgageLoansOnRealEstateFaceAmountOfMortgages
/ us-gaap_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis
= us-gaap_FirstMortgageMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= corr_CambellCountyWyomingMember
Carrying Amount of Mortgage 12,175,029us-gaap_MortgageLoansOnRealEstateCarryingAmountOfMortgages
/ us-gaap_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis
= us-gaap_FirstMortgageMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= corr_CambellCountyWyomingMember
Principal Amount of Loans Subject to Delinquent Principal or Interest 0us-gaap_MortgageLoansOnRealEstatePrincipalAmountOfDelinquentLoans
/ us-gaap_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis
= us-gaap_FirstMortgageMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= corr_CambellCountyWyomingMember
Cambell County Wyoming [Member] | Second Mortgage [Member]  
Mortgage Loans on Real Estate [Line Items]  
Interest Rate 12.00%us-gaap_MortgageLoansOnRealEstateInterestRate
/ us-gaap_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis
= us-gaap_SecondMortgageMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= corr_CambellCountyWyomingMember
Monthly Payment Amount (2) 35,115corr_MortgageLoansonRealEstateMonthlyPaymentAmount
/ us-gaap_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis
= us-gaap_SecondMortgageMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= corr_CambellCountyWyomingMember
Face Value 3,300,000us-gaap_MortgageLoansOnRealEstateFaceAmountOfMortgages
/ us-gaap_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis
= us-gaap_SecondMortgageMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= corr_CambellCountyWyomingMember
Carrying Amount of Mortgage 3,336,403us-gaap_MortgageLoansOnRealEstateCarryingAmountOfMortgages
/ us-gaap_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis
= us-gaap_SecondMortgageMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= corr_CambellCountyWyomingMember
Principal Amount of Loans Subject to Delinquent Principal or Interest 0us-gaap_MortgageLoansOnRealEstatePrincipalAmountOfDelinquentLoans
/ us-gaap_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis
= us-gaap_SecondMortgageMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= corr_CambellCountyWyomingMember
Bilings, Dunn and McKensie Counties, North Dakota [Member] | First Mortgage [Member]  
Mortgage Loans on Real Estate [Line Items]  
Interest Rate 12.00%us-gaap_MortgageLoansOnRealEstateInterestRate
/ us-gaap_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis
= us-gaap_FirstMortgageMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= corr_BilingsDunnandMcKensieCountiesNorthDakotaMember
Monthly Payment Amount (2) 40,000corr_MortgageLoansonRealEstateMonthlyPaymentAmount
/ us-gaap_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis
= us-gaap_FirstMortgageMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= corr_BilingsDunnandMcKensieCountiesNorthDakotaMember
Face Value 4,000,000us-gaap_MortgageLoansOnRealEstateFaceAmountOfMortgages
/ us-gaap_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis
= us-gaap_FirstMortgageMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= corr_BilingsDunnandMcKensieCountiesNorthDakotaMember
Carrying Amount of Mortgage 3,948,738us-gaap_MortgageLoansOnRealEstateCarryingAmountOfMortgages
/ us-gaap_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis
= us-gaap_FirstMortgageMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= corr_BilingsDunnandMcKensieCountiesNorthDakotaMember
Principal Amount of Loans Subject to Delinquent Principal or Interest 0us-gaap_MortgageLoansOnRealEstatePrincipalAmountOfDelinquentLoans
/ us-gaap_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis
= us-gaap_FirstMortgageMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= corr_BilingsDunnandMcKensieCountiesNorthDakotaMember
Bilings, Dunn and McKensie Counties, North Dakota [Member] | Second Mortgage [Member]  
Mortgage Loans on Real Estate [Line Items]  
Interest Rate 13.00%us-gaap_MortgageLoansOnRealEstateInterestRate
/ us-gaap_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis
= us-gaap_SecondMortgageMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= corr_BilingsDunnandMcKensieCountiesNorthDakotaMember
Monthly Payment Amount (2) 10,833corr_MortgageLoansonRealEstateMonthlyPaymentAmount
/ us-gaap_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis
= us-gaap_SecondMortgageMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= corr_BilingsDunnandMcKensieCountiesNorthDakotaMember
Face Value 1,000,000us-gaap_MortgageLoansOnRealEstateFaceAmountOfMortgages
/ us-gaap_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis
= us-gaap_SecondMortgageMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= corr_BilingsDunnandMcKensieCountiesNorthDakotaMember
Carrying Amount of Mortgage 975,000us-gaap_MortgageLoansOnRealEstateCarryingAmountOfMortgages
/ us-gaap_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis
= us-gaap_SecondMortgageMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= corr_BilingsDunnandMcKensieCountiesNorthDakotaMember
Principal Amount of Loans Subject to Delinquent Principal or Interest $ 0us-gaap_MortgageLoansOnRealEstatePrincipalAmountOfDelinquentLoans
/ us-gaap_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis
= us-gaap_SecondMortgageMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= corr_BilingsDunnandMcKensieCountiesNorthDakotaMember