Investment Securities (Detail Textuals) $ in Thousands	Sep. 30, 2018 USD ($) Security	Dec. 31, 2017 USD ($) Security
Schedule Of Available For Sale and Held To Maturity Securities [Line Items]
Number of securities in unrealized loss position	35	33
Number of securities in unrealized loss position in for greater than twelve months	25	15
Number of securities in unrealized loss position in for less than twelve months	10	18
Aggregate unrealized loss position of the securities | $	$ 4,774	$ 3,076
Maximum [Member]
Schedule Of Available For Sale and Held To Maturity Securities [Line Items]
Aggregate unrealized loss position of the securities | $	$ 500	500
Mortgage-backed securities - residential
Schedule Of Available For Sale and Held To Maturity Securities [Line Items]
Number of securities in unrealized loss position in for greater than twelve months	13
Number of securities in unrealized loss position in for less than twelve months	1
State and political subdivisions
Schedule Of Available For Sale and Held To Maturity Securities [Line Items]
Number of securities in unrealized loss position in for greater than twelve months	12
Number of securities in unrealized loss position in for less than twelve months	9
Aggregate unrealized loss position of the securities | $	$ 4,608	$ 2,905