Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 5,238	$ 4,007
Other Comprehensive Income (Loss)
Net unrealized holding gain (loss) on securities available for sale	6,959	(4,931)
Reclassification adjustment for realized gains included in net income	(444)	(154)
Other comprehensive income, before tax, total	6,515	(5,085)
Income tax (benefit) expense related to other comprehensive income	(1,376)	1,079
Other comprehensive income (loss), net of tax	5,139	(4,006)
Comprehensive Income	$ 10,377	$ 1