Financial Instruments with Off-Balance Sheet Risk (Schedule of Commitments Outstanding) (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments outstanding	$ 240,206	$ 213,207
Commitments to Extend Credit [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments outstanding	232,787	206,065
Unused lines of Credit [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments outstanding	$ 7,419	$ 7,142