Derivative Financial Instruments - Schedule of Derivative Assets and Liabilties (Details) - USD ($)	Jun. 30, 2015	Dec. 31, 2014
Assets, at Fair Value	$ 8,728,000	$ 6,391,000
Liabilities, at Fair Value	(207,000)	(1,364,000)
Eurodollar Future Margin [Member]
Assets, at Fair Value	8,663,000	5,174,000
Interest Rate Swaption [Member]
Assets, at Fair Value	65,000	1,217,000
Interest Rate Swaption Margin [Member]
Liabilities, at Fair Value	(207,000)	(1,364,000)
TBA Contracts [Member]
Assets, at Fair Value	$ 0	$ 0