SEGMENT DISCLOSURE (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2015 item	Mar. 31, 2014
Segment disclosure
Number of types of commercial real estate properties	3
Revenues	$ 67,239us-gaap_Revenues	$ 62,597us-gaap_Revenues
Property expenses:
General and administrative	2,592us-gaap_GeneralAndAdministrativeExpense	774us-gaap_GeneralAndAdministrativeExpense
EXPENSES	67,469us-gaap_CostsAndExpenses	57,231us-gaap_CostsAndExpenses
Reportable segments
Property expenses:
Total segment net operating income	34,093	32,633
Reportable segments \| Office properties
Segment disclosure
Revenues	46,615	43,274
Property expenses:
Operating	19,391	17,653
General and administrative	313	316
EXPENSES	19,704	17,969
Total segment net operating income	26,911	25,305
Reportable segments \| Hotel properties
Segment disclosure
Revenues	15,719	14,339
Property expenses:
Operating	10,677	9,846
General and administrative	41	37
EXPENSES	10,718	9,883
Total segment net operating income	5,001	4,456
Reportable segments \| Multi-family properties
Segment disclosure
Revenues	4,905	4,984
Property expenses:
Operating	2,641	2,087
General and administrative	83	25
EXPENSES	2,724	2,112
Total segment net operating income	$ 2,181	$ 2,872

Represents the number of types of commercial real estate properties.

No definition available.

Name:	cmct_NumberOfTypesOfCommercialRealEstateProperties
Namespace Prefix:	cmct_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Total costs of sales and operating expenses for the period.

+ References

+ Details

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

- Details

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

- Definition

The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

+ References

+ Details

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

- Definition

Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services. Excludes Selling, General and Administrative Expense.

+ References

No definition available.

+ Details

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

- Definition

The net result for the period of deducting operating expenses from operating revenues.

+ References

No definition available.

+ Details

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

- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

+ Details

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

- Details

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

- Details

Name:	us-gaap_ConsolidationItemsAxis=us-gaap_OperatingSegmentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: