Equity Investments in Unconsolidated Subsidiaries (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
Sep. 30, 2012
CT Opportunity Partners I, LP
Commitment to invest in equity method investments maximum amount	$ 25,000
Percentage of total capital commitment to invest	4.60%
Funded commitment amount, total	17,100
Return of capital on equity method investments	6,900
Funded commitment amount, net	10,200
Unfunded commitment amount	14,800
Maximum exposure to loss from equity investment	7,700
Incentive compensation	5,900
Incentive compensation, percentage of funds profit	17.70%
Preferred return	9.00%
Return of capital to partners	100.00%
CT High Grade II
Funded commitment amount, net	2,900
Unfunded commitment amount	480
Maximum exposure to loss from equity investment	2,800
Ownership, percentage	44.00%
Initial co-investment	$ 2,800

Commitment to invest in equity method investments; maximum amount.

No definition available.

Name:	CT_CommitmentToInvestInEquityMethodInvestmentsMaximumAmount
Namespace Prefix:	CT_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The funded commitment amount, net.

+ References

No definition available.

+ Details

Name:	CT_FundedCommitmentAmountNet
Namespace Prefix:	CT_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Total funded commitment amount.

+ References

No definition available.

+ Details

Name:	CT_FundedCommitmentAmountTotal
Namespace Prefix:	CT_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of incentive allocation recognized from CTOPI under the equity method of accounting, which has not been received and will not be recognized into income until the appropriate contingencies have been eliminated.

+ References

No definition available.

+ Details

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

- Definition

The percentage of fund's profits that may be earned as incentive compensation after a preferred return and return of capital to investors.

+ References

No definition available.

+ Details

Name:	CT_IncentiveCompensationOfFundsProfit
Namespace Prefix:	CT_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

This element represents the amount of our initial investment in CT High Grade II.

+ References

No definition available.

+ Details

Name:	CT_InitialEquityInvestment
Namespace Prefix:	CT_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The reporting entity's maximum amount of exposure to loss as a result of its involvement with the equity investment.

+ References

No definition available.

+ Details

Name:	CT_MaximumExposureToLossFromEquityInvestment
Namespace Prefix:	CT_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The percentage of total capital commitments which have been made by us.

+ References

No definition available.

+ Details

Name:	CT_PercentageOfTotalCapitalCommitmentToInvest
Namespace Prefix:	CT_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The preferred return percentage that must be paid to investors before incentive compensation can be earned.

+ References

No definition available.

+ Details

Name:	CT_PreferredReturn
Namespace Prefix:	CT_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The excess distributions over earnings on equity method investments.

+ References

No definition available.

+ Details

Name:	CT_ReturnOfCapitalOnEquityMethodInvestments
Namespace Prefix:	CT_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The percentage of capital that must be returned to investors before incentive compensation can be earned.

+ References

No definition available.

+ Details

Name:	CT_ReturnOfCapitalToPartners
Namespace Prefix:	CT_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The unfunded commitment amount.

+ References

No definition available.

+ Details

Name:	CT_UnfundedCommitmentAmount
Namespace Prefix:	CT_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 159

-Paragraph 18

-Subparagraph f

-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.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 323

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571

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

-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 18

-Paragraph 20

-Subparagraph a (1)

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