Long-Term Debt (Summary Of Long Term Debt) (Details) $ in Thousands	12 Months Ended
Dec. 31, 2017 USD ($) property	Dec. 31, 2016 USD ($)
Debt Instrument [Line Items]
Total fixed rate debt	$ 24,317	$ 30,159
Total variable rate debt	99,768	33,230
Total Long-term debt	124,085	63,389
Less: Deferred financing costs	(3,504)	(669)
Total long-term debt, net of deferred financing costs	120,581	62,720
Less: Long-term debt related to hotel properties held for sale, net of deferred financing costs of $233 and $168	(4,976)	(14,802)
Long-term debt related to hotel properties held for use, net of deferred financing costs of $2,985 and $501	$ 115,605	47,918
Number of hotels \| property	18
Deferred financing costs	$ 174	168
Deferred finance costs, assets held-for-sale	$ 3,330	501
Encumbered Wholly Owned Properties [Member]
Debt Instrument [Line Items]
Number of hotels \| property	17
Morgan Stanley Bank of America Merrill Lynch Trust 2014-C18 [Member]
Debt Instrument [Line Items]
Total fixed rate debt	$ 8,987
Fixed rate, interest rate	4.54%
Maturity	Aug. 31, 2024
Amortization provision	25 years
Morgan Stanley Bank of America Merrill Lynch Trust 2014-C18 [Member] \| Encumbered Wholly Owned Properties [Member]
Debt Instrument [Line Items]
Number of hotels \| property	1
Great Western Bank [Member]
Debt Instrument [Line Items]
Total fixed rate debt	$ 13,950	14,326
Fixed rate, interest rate	4.33%
Maturity	Dec. 31, 2021
Amortization provision	25 years
Great Western Bank [Member] \| Encumbered Wholly Owned Properties [Member]
Debt Instrument [Line Items]
Number of hotels \| property	1
Great Western Bank [Member]
Debt Instrument [Line Items]
Total fixed rate debt	$ 1,380	1,599
Fixed rate, interest rate	4.33%
Maturity	Dec. 31, 2021
Amortization provision	7 years
Western Alliance Bank [Member]
Debt Instrument [Line Items]
Total fixed rate debt		4,806
Fixed rate, interest rate	7.17%
Maturity	Feb. 28, 2017
Amortization provision	15 years
Western Alliance Bank [Member]
Debt Instrument [Line Items]
Total fixed rate debt		2,803
Fixed rate, interest rate	4.75%
Maturity	Feb. 28, 2018
Amortization provision	15 years
Cantor Commercial Real Estate Lending [Member]
Debt Instrument [Line Items]
Total fixed rate debt		5,713
Fixed rate, interest rate	4.25%
Maturity	Nov. 30, 2017
Amortization provision	30 years
Cantor Commercial Real Estate Lending [Member] \| Encumbered Wholly Owned Properties [Member]
Debt Instrument [Line Items]
Number of hotels \| property
Morgan Stanley Mortgage Capital Holdings, LLC [Member]
Debt Instrument [Line Items]
Total fixed rate debt		912
Fixed rate, interest rate	5.83%
Maturity	Dec. 31, 2017
Amortization provision	25 years
Wells Fargo [Member]
Debt Instrument [Line Items]
Total variable rate debt	$ 26,465
Variable rate, interest rate	4.44%
Maturity	Nov. 30, 2022
Amortization provision	30 years
Wells Fargo [Member] \| Encumbered Wholly Owned Properties [Member]
Debt Instrument [Line Items]
Number of hotels \| property	3
Wells Fargo [Member] \| LIBOR [Member]
Debt Instrument [Line Items]
Basis spread	2.39%
Reference rate	30-day LIBOR
Wells Fargo [Member] \| Federal Funds Effective Swap Rate [Member]
Debt Instrument [Line Items]
Basis spread	4.44%
KeyBank Credit Facility [Member]
Debt Instrument [Line Items]
Total variable rate debt	$ 73,303
Variable rate, interest rate	4.55%
Maturity	Mar. 31, 2020
Available borrowing capacity	$ 11,934
Commitment fee	0.20%
KeyBank Credit Facility [Member] \| Encumbered Wholly Owned Properties [Member]
Debt Instrument [Line Items]
Number of hotels \| property	12
KeyBank Credit Facility [Member] \| LIBOR [Member]
Debt Instrument [Line Items]
Reference rate	30-day LIBOR
KeyBank Credit Facility [Member] \| LIBOR [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Basis spread	2.25%
KeyBank Credit Facility [Member] \| LIBOR [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Basis spread	3.00%
KeyBank Credit Facility [Member] \| Base Rate [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Basis spread	1.25%
KeyBank Credit Facility [Member] \| Base Rate [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Basis spread	2.00%
Western Alliance Bank [Member]
Debt Instrument [Line Items]
Total variable rate debt		4,882
Maturity	Nov. 30, 2020
Amortization provision	25 years
Western Alliance Bank [Member] \| LIBOR [Member]
Debt Instrument [Line Items]
Basis spread	3.25%
Reference rate	90-day LIBOR
Western Alliance Bank [Member]
Debt Instrument [Line Items]
Total variable rate debt		9,863
Maturity	Nov. 30, 2020
Amortization provision	25 years
Western Alliance Bank [Member] \| LIBOR [Member]
Debt Instrument [Line Items]
Basis spread	3.25%
Reference rate	90-day LIBOR
The Huntington National Bank [Member]
Debt Instrument [Line Items]
Total variable rate debt		7,361
Maturity	Nov. 30, 2020
Amortization provision	25 years
The Huntington National Bank [Member] \| LIBOR [Member]
Debt Instrument [Line Items]
Basis spread	2.25%
Reference rate	30-day LIBOR
The Huntington National Bank [Member] \| Federal Funds Effective Swap Rate [Member]
Debt Instrument [Line Items]
Basis spread	4.13%
LMREC 2015 - CREI, Inc. (Latitude) [Member]
Debt Instrument [Line Items]
Total variable rate debt		11,124
Maturity	May 31, 2018
Monthly payment	$ 12
LMREC 2015 - CREI, Inc. (Latitude) [Member] \| LIBOR [Member]
Debt Instrument [Line Items]
Basis spread	6.25%
Reference rate	30-day LIBOR
Interest Rate Cap [Member] \| KeyBank Credit Facility [Member]
Debt Instrument [Line Items]
Notional amount	$ 50,000
Cap interest rate	2.50%
Interest Rate Cap [Member] \| KeyBank Credit Facility [Member] \| LIBOR [Member]
Debt Instrument [Line Items]
Basis spread	2.50%
Reference rate	30-day LIBOR
Interest Rate Cap [Member] \| LMREC 2015 - CREI, Inc. (Latitude) [Member]
Debt Instrument [Line Items]
Notional amount		$ 11,124
Interest Rate Cap [Member] \| LMREC 2015 - CREI, Inc. (Latitude) [Member] \| LIBOR [Member]
Debt Instrument [Line Items]
Basis spread	1.00%
Reference rate	30-day LIBOR

Accumulated Amortization, Deferred Finance Costs, Assets Held For Sale

No definition available.

Name:	cdor_AccumulatedAmortizationDeferredFinanceCostsAssetsHeldForSale
Namespace Prefix:	cdor_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Debt Instrument, Amortization Provision, Term

+ References

No definition available.

+ Details

Name:	cdor_DebtInstrumentAmortizationProvisionTerm
Namespace Prefix:	cdor_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Long-term Debt, Fixed Rate

+ References

No definition available.

+ Details

Name:	cdor_LongTermDebtFixedRate
Namespace Prefix:	cdor_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Long Term Debt Including Liabilities Held For Sale

+ References

No definition available.

+ Details

Name:	cdor_LongTermDebtIncludingLiabilitiesHeldForSale
Namespace Prefix:	cdor_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Long-term debt related to hotel properties held for sale, net of deferred financing costs

+ References

No definition available.

+ Details

Name:	cdor_LongTermDebtRelatedToHotelPropertiesHeldForSaleNetOfDeferredFinancingCosts
Namespace Prefix:	cdor_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Long-term Debt, Variable Rate

+ References

No definition available.

+ Details

Name:	cdor_LongTermDebtVariableRate
Namespace Prefix:	cdor_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
-Sentence Column B

+ Details

Name:	invest_DerivativeNotionalAmount
Namespace Prefix:	invest_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of accumulated amortization of debt issuance costs.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28555-108399

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.17)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_AccumulatedAmortizationDeferredFinanceCosts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(16))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

+ Details

Name:	us-gaap_DebtInstrumentCarryingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentDescriptionOfVariableRateBasis
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The average effective interest rate during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateDuringPeriod
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

+ Details

Name:	us-gaap_DebtInstrumentMaturityDate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of the required periodic payments including both interest and principal payments.

+ References

+ Details

Name:	us-gaap_DebtInstrumentPeriodicPayment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

+ References

+ Details

Name:	us-gaap_DeferredFinanceCostsNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Cap rate on an interest rate derivative such as an interest rate cap or collar. If market rates exceed the cap rate, a payment or receipt is triggered on the contract.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeCapInterestRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityCommitmentFeePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(16))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_LongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The number of real estate properties owned as of the balance sheet date.

+ References

No definition available.

+ Details

Name:	us-gaap_NumberOfRealEstateProperties
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_RealEstatePropertiesAxis=cdor_EncumberedWhollyOwnedPropertiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=cdor_DebtInstrumentThirteenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=cdor_DebtInstrumentOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=cdor_DebtInstrumentTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=cdor_DebtInstrumentThreeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=cdor_DebtInstrumentFourMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=cdor_DebtInstrumentFiveMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=cdor_DebtInstrumentSixMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=cdor_DebtInstrumentFourteenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_FederalFundsEffectiveSwapRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=cdor_DebtInstrumentNineMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_BaseRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=cdor_DebtInstrumentSevenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=cdor_DebtInstrumentEightMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=cdor_DebtInstrumentTenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=cdor_DebtInstrumentElevenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=us-gaap_InterestRateCapMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: