Derivative Financial Instruments - Schedule of Derivative Assets and Liabilties (Details) - USD ($)	Mar. 31, 2017	Dec. 31, 2016
Assets, at Fair Value	$ 12,430,000	$ 10,365,000
Liabilities, at Fair Value	3,633,000	1,982,000
Restricted cash	17,660,000	20,950,000
Interest Rate Swaps [Member]
Assets, at Fair Value	12,430,000	10,302,000
Liabilities, at Fair Value	1,397,000	802,000
Receiver Swaption [Member]
Assets, at Fair Value	0	0
TBA Contracts [Member]
Assets, at Fair Value	0	63,000
Liabilities, at Fair Value	2,236,000	1,180,000
Restricted cash	1,219,000	446,000
Eurodollar Future Margin [Member]
Restricted cash	12,001,000	9,419,000
Interest Rate Swaption Margin [Member]
Restricted cash	$ 0	$ 0