Derivative Instruments (Schedule of Information About Interest Rate Swaps) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Swap [Member]
Derivative [Line Items]
Notional Amount	$ 17,200,000	$ 17,200,000
Weighted Average Pay Rate	2.72%	2.72%
Weighted Average Receive Rate	0.23%	0.24%
Weighted Average Years to Maturity	8 years 7 months 6 days	9 years 7 months 6 days
Swap [Member] | Derivative - Maturity Date Five [Member]
Derivative [Line Items]
Maturity	Dec. 31, 2023	Dec. 31, 2023
Notional Amount	17,200,000	17,200,000
Weighted Average Pay Rate	2.72%	2.72%
Weighted Average Receive Rate	0.23%	0.24%
Weighted Average Years to Maturity	8 years 7 months 6 days	9 years 7 months 6 days
Interest Rate Swaption [Member]
Derivative [Line Items]
Notional Amount	225,000,000
Interest Rate Swaption [Member] | Derivative - Maturity Date Four [Member]
Derivative [Line Items]
Swaption Expiration	Dec. 31, 2015
Maturity	Dec. 31, 2025
Notional Amount	$ 225,000,000
Strike Rate	3.64%