Derivative Instruments (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Interest Rate Derivative Liabilities, at Fair Value	$ 1,979,000	$ 1,082,000
Derivative, Notional Amount	50,000,000
Interest Rate Swap No. 1 [Member]
Derivatives, Fair Value [Line Items]
Interest Rate Derivative Liabilities, at Fair Value	1,482,000	881,000
Derivative, Notional Amount	25,000,000
Derivative, Fixed Interest Rate	3.75%
Derivative, Maturity Date	Aug. 29, 2024
Interest Rate Swap No. 2 [Member]
Derivatives, Fair Value [Line Items]
Interest Rate Derivative Liabilities, at Fair Value	497,000	201,000
Derivative, Notional Amount	$ 25,000,000
Derivative, Fixed Interest Rate	2.98%
Derivative, Maturity Date	Aug. 29, 2019