Derivative Financial Instruments - Schedule of Derivative Assets and Liabilties (Details) - USD ($)	Dec. 31, 2015	Dec. 31, 2014
Assets, at Fair Value	$ 9,152,000	$ 6,391,000
Liabilities, at Fair Value	0	(1,364,000)
Eurodollar Future Margin [Member]
Assets, at Fair Value	8,483,000	5,174,000
Receiver Swaption [Member]
Assets, at Fair Value	669,000	0
Payer Swaption [Member]
Assets, at Fair Value	0	1,217,000
Interest Rate Swaption Margin [Member]
Liabilities, at Fair Value	$ 0	$ (1,364,000)