Derivative Instruments (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Dec. 31, 2016
Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Interest Rate Derivative Liabilities, at Fair Value	$ 936	$ 1,046
Derivative, Notional Amount	50,000
Interest Rate Swap No. 1 [Member]
Derivatives, Fair Value [Line Items]
Interest Rate Derivative Liabilities, at Fair Value	833	835
Derivative, Notional Amount	$ 25,000
Derivative, Fixed Interest Rate	2.50%
Derivative, Maturity Date	Aug. 29, 2024
Interest Rate Swap No. 2 [Member]
Derivatives, Fair Value [Line Items]
Interest Rate Derivative Liabilities, at Fair Value	$ 103	211
Derivative, Notional Amount	$ 25,000
Derivative, Fixed Interest Rate	1.73%
Derivative, Maturity Date	Aug. 29, 2019
Fair Value, Inputs, Level 2 [Member] | Interest Rate Swap No. 1 [Member]
Derivatives, Fair Value [Line Items]
Interest Rate Derivative Liabilities, at Fair Value	$ 833	835
Fair Value, Inputs, Level 2 [Member] | Interest Rate Swap No. 2 [Member]
Derivatives, Fair Value [Line Items]
Interest Rate Derivative Liabilities, at Fair Value	$ 103	$ 211