Derivative Financial Instruments - Summary of Outstanding Swaptions (Details) (USD $)	9 Months Ended
	Sep. 30, 2014	Dec. 31, 2013
Derivatives, Fair Value [Line Items]
Assets, at Fair Value	$ 6,906,000	$ 2,446,000
Interest Rate Swaption [Member]
Derivatives, Fair Value [Line Items]
Swaption Cost	4,720,000
Assets, at Fair Value	3,906,000	0
Derivative Instruments Average Months To Expiration	10
Notional Amount	275,000,000
Derivative Average Fixed Interest Rate	2.96%
Derivative Avergage Receive Rate	3 Month
Term (Years)	8 years 2 months 5 days
Interest Rate Swaption [Member] | Less Than Or Equal To One Year [Member]
Derivatives, Fair Value [Line Items]
Swaption Cost	4,720,000
Assets, at Fair Value	3,906,000
Derivative Instruments Average Months To Expiration	10
Notional Amount	$ 275,000,000
Derivative Average Fixed Interest Rate	2.96%
Derivative Avergage Receive Rate	3 Month
Term (Years)	8 years 2 months 5 days