Fair Value (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2012
Loans Held For Sale
Beginning of Period	$ 30,875
Deconsolidation of CT Legacy Asset	(30,875)
Fair value adjustment on investment in CT Legacy Asset
End of Period
Real Estate Held For Sale
Beginning of Period	10,342
Deconsolidation of CT Legacy Asset	(10,342)
Fair value adjustment on investment in CT Legacy Asset
End of Period
Investment in CT Legacy Assets
Beginning of Period
Deconsolidation of CT Legacy Asset	89,676
Contributions to CT Legacy Asset	112,505
Distributions from CT Legacy Asset	(122,085)
Fair value adjustment on investment in CT Legacy Asset	51,904
End of Period	$ 132,100

The value of asset in deconsolidation of a subsidiary or derecognition of a group of assets.

No definition available.

Name:	CT_DeconsolidationOfCtLegacyAsset
Namespace Prefix:	CT_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The amount of contributions by CT Legacy REIT to CT Legacy Assets during the period.

+ References

No definition available.

+ Details

Name:	CT_FairValueLiabilitiesMeasuredOnRecurringBasisContributions
Namespace Prefix:	CT_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The amount of distributions from CT Legacy Assets to CT Legacy REIT during the period.

+ References

No definition available.

+ Details

Name:	CT_FairValueLiabilitiesMeasuredOnRecurringBasisDistributions
Namespace Prefix:	CT_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of gain (loss) recognized in earnings, arising from assets measured at fair value on a recurring basis using unobservable inputs (level 3).

+ References

+ Details

Name:	us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

This element represents an asset measured at fair value using significant unobservable inputs (Level 3) which is required for reconciliation purposes of beginning and ending balances.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 157

-Paragraph 32

-Subparagraph c

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

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