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Repurchase Agreement - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
 1 Months Ended 3 Months Ended
Feb. 28, 2013
Jan. 31, 2013
Mar. 31, 2013
Securities
Text Block [Abstract]      
Investment in the form of repurchase facility secured by Class A-2 CDO bond     $ 47,439
Total balance of the Company's investment in the repurchase facility     47,439
Aggregate face amount of borrowings under repurchase facility     $ 68,726
Advance rate on CDO bond's face amount in percentage     69.00%
Number of senior and subordinate commercial real estate debt positions and commercial real estate securities included in CDO     58
Interest rate for repurchase facility     13.00%
Current pay interest rate     10.00%
Accrual interest rate     3.00%
Initial term for repurchase facility     18 months with three six-month extensions options
Interest rate for principal repayments that occur prior to the 21st month are subject to a make-whole provision     13.00%
IRR on investment 15.00% 17.00%