Securities, Pooled Trust Preferred Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2018		Dec. 31, 2017
Schedule Of Available For Sale Securities [Line Items]
Cost, net of OTTI	$ 74,527		$ 72,198
Fair value	73,079		72,153
Cumulative Amount of OTTI	331		1,201
Corporate Bonds [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost, net of OTTI	669		3,816
Fair value	$ 850	[1]	$ 4,139
Percent of Underlying Collateral Performing	88.60%
Percent of Underlying Collateral in Deferral	4.50%
Percent of Underlying Collateral in Default	6.90%
Cumulative Amount of OTTI	$ 331
Cumulative Other Comprehensive Income, net of tax	$ (143)

[1] Current Moody’s Ratings is B2.