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Commercial Mortgage Loans - Additional Information (Details) (USD $) In Thousands, unless otherwise specified | 1 Months Ended | 3 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2013 participation_interest | Mar. 31, 2013 Hotel [Member] Maryland [Member] | Sep. 30, 2013 Mixed Use [Member] Massachusetts [Member] acre | Dec. 31, 2012 Mixed Use [Member] Massachusetts [Member] acre
Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |
Fees received on transfer of controlling ownership |  | $ 280 |  |  |  |
Senior Sub-Participation Interests | 2 |  |  |  |  |
Area of property (in acres) |  |  | 20 | [1] | 20 | [1]
Sub-participation percentage of par | 78.00% |  |  |  |  |
Sub-participation brokerage fee | 3.00% |  |  |  |  |
Internal rate of return | 25.00% |  |  |  |  |
[1] | This loan includes two one-year extension options subject to certain conditions and the payment of a fee for each extension.

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- Definition Fees Received On Loan Transfer + References No definition available. + Details
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- Details
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