Investment Securities, at Fair Value (Scheduled Maturity of CMBS) (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Fair Value
Total	$ 48,162	$ 53,304
CMBS [Member]
Amortized Cost
Due within one year	0
Due after one year through five years	21,656
Due after five years through 10 years	12,508
Due after 10 years	14,770
Amortized Cost	48,934	52,115
Fair Value
Due within one year	0
Due after one year through five years	22,316
Due after five years through 10 years	10,664
Due after 10 years	15,182
Total	$ 48,162	$ 53,304