Derivatives (Summary of Derivative Instruments) (Details) - Interest Rate Swap [Member] $ in Thousands	Mar. 31, 2018 USD ($) Rate
Effective September 1, 2016 through September 1, 2021 [Member]
Derivative [Line Items]
Notional Amount	$ 25,000
Fixed Interest Rate | Rate	3.105%
Effective September 1, 2015 through September 1, 2021 [Member]
Derivative [Line Items]
Notional Amount	$ 25,000
Fixed Interest Rate | Rate	3.304%
Effective November 7, 2014 through November 7, 2024 [Member]
Derivative [Line Items]
Notional Amount	$ 6,942	[1]
Fixed Interest Rate | Rate	4.50%
Derivative, Amortizing Notional Amount	$ 35
Effective January 7, 2017 through January 7, 2025 [Member]
Derivative [Line Items]
Notional Amount	$ 5,294	[2]
Fixed Interest Rate | Rate	4.30%
Derivative, Amortizing Notional Amount	$ 26

[1] Interest rate swap notional amount amortizes by $35 monthly to maturity.

[2] Interest rate swap notional amount amortizes by $26 monthly to maturity.