Derivative Financial Instruments - Schedule of Derivative Assets and Liabilties (Details) - USD ($)	Dec. 31, 2016	Dec. 31, 2015
Assets, at Fair Value	$ 10,365,000	$ 669,000
Liabilities, at Fair Value	1,982,000	0
Derivative Margin Balance	9,865,000	8,483,000
Interest Rate Swaps [Member]
Assets, at Fair Value	10,302,000	0
Liabilities, at Fair Value	802,000	0
Receiver Swaption [Member]
Assets, at Fair Value	0	669,000
To Be Announced Contracts [Member]
Assets, at Fair Value	63,000	0
Liabilities, at Fair Value	1,180,000	0
Eurodollar Future Margin [Member]
Derivative Margin Balance	9,419,000	8,483,000
To Be Announced Contract Margin [Member]
Derivative Margin Balance	$ 446,000	$ 0