Securities, Pooled Trust Preferred Securities (Details) - USD ($) $ in Thousands		Jun. 30, 2017	Dec. 31, 2016
Pooled Trust Preferred Securities [Abstract]
Cost, net of OTTI loss		$ 63,915	$ 51,130
Fair value		63,993	49,973
Cumulative amount of OTTI Loss		1,178	1,215
Pooled Trust Preferred Securities II [Member]
Pooled Trust Preferred Securities [Abstract]
Cost, net of OTTI loss		1,683
Fair value	[1]	$ 1,300
Percent of underlying collateral performing		81.00%
Percent of underlying collateral in deferral		2.90%
Percent of underlying collateral in default		16.10%
Cumulative amount of OTTI Loss		$ 275
Cumulative other comprehensive (gain) loss, net of tax benefit		253
Pooled Trust Preferred Securities III [Member]
Pooled Trust Preferred Securities [Abstract]
Cost, net of OTTI loss		1,448
Fair value	[1]	$ 1,360
Percent of underlying collateral performing		87.10%
Percent of underlying collateral in deferral		3.70%
Percent of underlying collateral in default		9.20%
Cumulative amount of OTTI Loss		$ 552
Cumulative other comprehensive (gain) loss, net of tax benefit		58
Pooled Trust Preferred Securities IV [Member]
Pooled Trust Preferred Securities [Abstract]
Cost, net of OTTI loss		649
Fair value	[1]	$ 641
Percent of underlying collateral performing		91.30%
Percent of underlying collateral in deferral		2.00%
Percent of underlying collateral in default		6.70%
Cumulative amount of OTTI Loss		$ 351
Cumulative other comprehensive (gain) loss, net of tax benefit		6
Corporate Bonds [Member]
Pooled Trust Preferred Securities [Abstract]
Cost, net of OTTI loss		3,780	3,743
Fair value		3,301	$ 2,785
Cumulative amount of OTTI Loss		1,178
Cumulative other comprehensive (gain) loss, net of tax benefit		$ 317

[1] Current Moody's Ratings range from Ba2 to B2.