CT Legacy Partners (Details 3) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Types of loans in CT Legacy Partner's portfolio, as well as the property type and geographic distribution of the properties
Book Value, net	$ 139,500	$ 141,500
CT Legacy Partners | Northeast
Types of loans in CT Legacy Partner's portfolio, as well as the property type and geographic distribution of the properties
Book Value, net	56,658
Percentage of Book Value	38.00%
CT Legacy Partners | Northwest
Types of loans in CT Legacy Partner's portfolio, as well as the property type and geographic distribution of the properties
Book Value, net	43,022
Percentage of Book Value	29.00%
CT Legacy Partners | West
Types of loans in CT Legacy Partner's portfolio, as well as the property type and geographic distribution of the properties
Book Value, net	13,705
Percentage of Book Value	9.00%
CT Legacy Partners | Southeast
Types of loans in CT Legacy Partner's portfolio, as well as the property type and geographic distribution of the properties
Book Value, net	11,931
Percentage of Book Value	8.00%
CT Legacy Partners | International
Types of loans in CT Legacy Partner's portfolio, as well as the property type and geographic distribution of the properties
Book Value, net	25,016
Percentage of Book Value	16.00%
CT Legacy Partners | Hotel
Types of loans in CT Legacy Partner's portfolio, as well as the property type and geographic distribution of the properties
Book Value, net	50,653
Percentage of Book Value	34.00%
CT Legacy Partners | Office
Types of loans in CT Legacy Partner's portfolio, as well as the property type and geographic distribution of the properties
Book Value, net	43,844
Percentage of Book Value	29.00%
CT Legacy Partners | Multifamily
Types of loans in CT Legacy Partner's portfolio, as well as the property type and geographic distribution of the properties
Book Value, net	12,814
Percentage of Book Value	9.00%
CT Legacy Partners | Other
Types of loans in CT Legacy Partner's portfolio, as well as the property type and geographic distribution of the properties
Book Value, net	43,021
Percentage of Book Value	28.00%
CT Legacy Partners | Subordinated interests in mortgages
Types of loans in CT Legacy Partner's portfolio, as well as the property type and geographic distribution of the properties
Book Value, net	80,853
Percentage of Book Value	54.00%
CT Legacy Partners | Mezzanine Loans
Types of loans in CT Legacy Partner's portfolio, as well as the property type and geographic distribution of the properties
Book Value, net	43,265
Percentage of Book Value	29.00%
CT Legacy Partners | Senior Mortgages
Types of loans in CT Legacy Partner's portfolio, as well as the property type and geographic distribution of the properties
Book Value, net	26,214
Percentage of Book Value	17.00%
CT Legacy Partners | Loans Receivable
Types of loans in CT Legacy Partner's portfolio, as well as the property type and geographic distribution of the properties
Book Value, net	$ 150,332
Percentage of Book Value	100.00%