Represents acquisition discounts.

No definition available.

Name:	cmct_AcquisitionDiscount
Namespace Prefix:	cmct_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Represents the information pertaining to discount adjustment between carrying value of our loans and estimated fair market value.

+ References

No definition available.

+ Details

Name:	cmct_BusinessAcquisitionDiscountAdjustmentRecognizedAsDifferenceBetweenCarryingValueOfLoansAndEstimatedFairMarketValue
Namespace Prefix:	cmct_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of unamortized discount of loans acquired in connection with business combinations in a disposal group.

+ References

No definition available.

+ Details

Name:	cmct_DisposalGroupIncludingDiscontinuedOperationLoansAcquisitionDiscountsUnamortized
Namespace Prefix:	cmct_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents the amount of Interest and fees earned during the period.

+ References

No definition available.

+ Details

Name:	cmct_InterestAndFeesIncome
Namespace Prefix:	cmct_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Actual interest rate for receivable under the agreement considering interest variable reference rate during the period.

+ References

No definition available.

+ Details

Name:	cmct_LoansReceivableActualInterestRate
Namespace Prefix:	cmct_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The interest rate floor of the reference rate as stated in the loan agreement and used to compute the variable rate on the loans receivable.

+ References

No definition available.

+ Details

Name:	cmct_LoansReceivableBasisSpreadOnVariableRateFloor
Namespace Prefix:	cmct_
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_AccountsNotesAndLoansReceivableLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of increase (decrease) of allowance reserve for credit loss.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.7(d))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

+ Details

Name:	us-gaap_AllowanceForLoanAndLeaseLossesPeriodIncreaseDecrease
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration

- Definition

The percentage points (also referred to as 'margin') added to the reference rate as stated in the loan agreement and used to compute the variable rate on the loans receivable. For instance, the loan agreement might state that the interest rate the borrower is obligated to pay is the London Interbank Offered Rate (LIBOR) plus three quarters (3/4) of a percentage point adjusted quarterly (each three months). LIBOR in this example is the index or reference rate, 3/4 percentage point is the margin, the reference rate plus the margin is the fully indexed rate. This element would be used to report separately the margin.

+ References

No definition available.

+ Details

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

- Definition

Amount of expense related to estimated loss from loan and lease transactions.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.11)
-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953423-111524

+ Details

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

- Details

Name:	us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=cmct_LendingDivisionSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis=cmct_FirstMortgageSecuredByHotelMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=cmct_CIMUrbanPartnersLPMember
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:

BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Loans Receivable (Details) - USD ($)	9 Months Ended	12 Months Ended
	Oct. 08, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Mar. 11, 2014
Loans receivable
(Decrease) increase in impairment allowance on loans receivable		$ 328,000
Impairments on loans receivable			$ 0	$ 0
Lending division
Loans receivable
Discount on acquisition					$ 33,907,000
Unamortized acquisition discounts		15,951,000
Acquisition discount		$ 3,274,000
First mortgage note secured by hotel located near Los Angeles Airport \| CIM Urban Partners, L.P
Loans receivable
Interest income and fees				$ 316,000
Interest rate during the period	7.10%
First mortgage note secured by hotel located near Los Angeles Airport \| CIM Urban Partners, L.P \| LIBOR
Loans receivable
Interest rate margin (as a percent)				2.35%
Variable interest, floor				4.75%