Cash and Cash Equivalents (Schedules of Cash and Cash Equivalents) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Cash and Cash Equivalents [Line Items]
Cash and due from banks	$ 82,273	$ 60,707
Interest bearing deposits in banks	$ 1,479	2,603
Cash and Due from Banks [Member]
Cash and Cash Equivalents [Line Items]
Interest rate	0.82%
FHLB [Member]
Cash and Cash Equivalents [Line Items]
Interest bearing deposits in banks	$ 464	1,590
Interest rate	1.24%
M&T Fed Funds sold [Member]
Cash and Cash Equivalents [Line Items]
Interest bearing deposits in banks	$ 1,015	$ 1,013
Interest rate	0.15%