SCHEDULE IV - MORTGAGE LOANS ON REAL ESTATE (Details 2) (USD $) In Thousands, unless otherwise specified	10 Months Ended
Dec. 31, 2014
MORTGAGE LOANS ON REAL ESTATE
Balance at the beginning of the period	$ 207,140us-gaap_MortgageLoansOnRealEstate
Additions during period
New mortgage loans	50,971
Other - deferral for collection of commitment fees, net of costs	634
Other - accretion of loan fees and discounts	5,442cmct_AccretionOfLoanFeesAndDiscounts
Deductions during period
Collections of principal	(49,373)
Foreclosures	(1,098)
Cost of mortgages sold, net	(24,522)
Other - bad debt expense, net of recoveries	(142)
Balance at end of the period	$ 189,052us-gaap_MortgageLoansOnRealEstate

Accretion of loan fees and discounts of mortgage loans.

No definition available.

Name:	cmct_AccretionOfLoanFeesAndDiscounts
Namespace Prefix:	cmct_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	cmct_MortgageLoansOnRealEstateAdditionsDuringPeriod
Namespace Prefix:	cmct_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	cmct_MortgageLoansOnRealEstateDeductionsDuringPeriod
Namespace Prefix:	cmct_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Mortgage loans on real estate bad expense net of recoveries.

+ References

No definition available.

+ Details

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

- Definition

Total carrying amount of mortgage loans as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 205

-SubTopic 10

-Section S99

-Paragraph 6

-Subparagraph (SX 210.5-04.(c) Schedule IV)

-URI http://asc.fasb.org/extlink&oid=27047687&loc=d3e5864-122674

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 29

-Article 12

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Paragraph c

-Subparagraph Schedule IV

-Article 5

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 948

-SubTopic 310

-Section S99

-Paragraph 1

-Subparagraph (SX 210.12-29.6)

-URI http://asc.fasb.org/extlink&oid=6589523&loc=d3e617274-123014

+ Details

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

- Details

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

- Definition

The amount of principal collected on mortgage loans on real estate during the reporting period.

+ References

+ Details

Name:	us-gaap_MortgageLoansOnRealEstateCollectionsOfPrincipal
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The carrying amount of mortgage loans on real estate that were sold during the reporting period.

+ References

+ Details

Name:	us-gaap_MortgageLoansOnRealEstateCostOfMortgagesSold
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The amount of mortgage loans on real estate which were foreclosed on during the reporting period.

+ References

+ Details

Name:	us-gaap_MortgageLoansOnRealEstateForeclosures
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Total amount of new mortgage loans on real estate during the reporting period.

+ References

+ Details

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

- Definition

Total amount of additions to mortgage loans other than new loans during the reporting period.

+ References

+ Details

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