Segment Reporting (Narrative) (Details) (Investment Management, USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Investment Management
Intercompany preferred dividend income received	$ 619	$ 191	$ 1,200	$ 626
Intercompany fees for serving as collateral manager and servicing activity	$ 133	$ 211	$ 369	$ 433

Intercompany fees earned by the Investment Management segment for serving as collateral manager of the CT CDOs and special servicing activity for certain CT CDO assets.

No definition available.

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