Investment Securities, at Fair Value (Scheduled Maturity of CMBS) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Fair Value
Total	$ 48,098	$ 53,304
CMBS [Member]
Amortized Cost
Due within one year	0
Due after one year through five years	21,489
Due after five years through 10 years	12,725
Due after 10 years	14,295
Amortized Cost	48,509	52,115
Fair Value
Due within one year	0
Due after one year through five years	22,066
Due after five years through 10 years	10,805
Due after 10 years	15,227
Total	$ 48,098	$ 53,304