Supplemental Consolidated Statements of Cash Flows Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash paid during the year for [Abstract]
Interest	$ 1,266	$ 1,085	$ 1,152
Income taxes	4,105	7,265	5,450
Supplemental disclosures of non-cash investing and financing activities [Abstract]
Stock dividend distributed	6,046	5,295	3,351
Fair value adjustment of securities available for sale, net of tax of $(349), ($564), and $(1,218) for the years ended December 31, 2018, 2017, and 2016, respectively	(870)	(846)	(1,828)
Loans held-for-investment transferred to other real estate owned	1,092	0	217
Tax deficiency related to expired, vested non-qualified stock options	0	0	(114)
Fair value adjustment of securities available for sale, tax	$ (349)	$ (564)	$ (1,218)