Cash and Cash Equivalents (Cash and Cash Equivalents) (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Cash and Cash Equivalents [Line Items]
Cash and due from banks	$ 71,405	$ 60,707
Interest bearing deposits in banks	1,557	2,603
FHLB [Member]
Cash and Cash Equivalents [Line Items]
Interest bearing deposits in banks	$ 543	1,590
Interest Rate	0.97%
M&T Fed Funds sold [Member]
Cash and Cash Equivalents [Line Items]
Interest bearing deposits in banks	$ 1,014	$ 1,013
Interest Rate	0.15%
Weighted Average [Member]
Cash and Cash Equivalents [Line Items]
Interest Rate	0.60%