Cash and Cash Equivalents (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Cash and Cash Equivalents [Abstract]
Cash and Due From Banks	$ 42,562	$ 43,024
Interest-Bearing Deposits at Banks	30,276	14,331
Total Cash and Cash Equivalents	72,838	57,355	$ 51,068	$ 46,295
Total required reserves, including vault cash and Federal Reserve Bank deposits	$ 30,771	$ 28,610