Investments Securities, at Fair Value (Scheduled Maturity of CMBS) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Fair Value
Total	$ 53,304	$ 58,646
CMBS [Member]
Amortized Cost
Due within one year	77
Due after one year through five years	23,594
Due after five years through 10 years	13,440
Due after 10 years	15,004
Amortized Cost	52,115	56,459
Fair Value
Due within one year	82
Due after one year through five years	24,622
Due after five years through 10 years	13,495
Due after 10 years	15,105
Total	$ 53,304	$ 58,646