Investment Securities, Proceeds From Sales (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Proceeds from sales and calls of securities [Abstract]
Gross proceeds	$ 99,323	$ 7,831	$ 105,941
Gross gains	78	143	250
Gross losses	$ 1,338	$ 12	$ 534