Derivative Financial Instruments - Summary of Outstanding Swaptions (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Derivatives, Fair Value [Line Items]
Assets, at Fair Value	$ 9,152,000	$ 6,391,000
Receiver Swaption [Member]
Derivatives, Fair Value [Line Items]
Swaption Cost	1,100,000
Assets, at Fair Value	$ 669,000	0
Derivative Instruments Average Months To Expiration	4 months 5 days
Notional Amount	$ 100,000,000
Derivative Average Fixed Interest Rate	1.77%
Derivative Avergage Receive Rate	3 Month
Term (Years)	5 years
Receiver Swaption [Member] | Less Than Or Equal To One Year [Member]
Derivatives, Fair Value [Line Items]
Swaption Cost	$ 1,100,000
Assets, at Fair Value	$ 669,000
Derivative Instruments Average Months To Expiration	4 months 5 days
Notional Amount	$ 100,000,000
Derivative Average Fixed Interest Rate	1.77%
Derivative Avergage Receive Rate	3 Month
Term (Years)	5 years
Payer Swaption [Member]
Derivatives, Fair Value [Line Items]
Swaption Cost		5,350,000
Assets, at Fair Value	$ 0	$ 1,217,000
Derivative Instruments Average Months To Expiration		6 months 6 days
Notional Amount		$ 375,000,000
Derivative Average Fixed Interest Rate		2.79%
Derivative Avergage Receive Rate		3 Month
Term (Years)		7 years 4 months
Payer Swaption [Member] | Less Than Or Equal To One Year [Member]
Derivatives, Fair Value [Line Items]
Swaption Cost		$ 5,350,000
Assets, at Fair Value		$ 1,217,000
Derivative Instruments Average Months To Expiration		6 months 6 days
Notional Amount		$ 375,000,000
Derivative Average Fixed Interest Rate		2.79%
Derivative Avergage Receive Rate		3 Month
Term (Years)		7 years 4 months