CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement Of Income And Comprehensive Income [Abstract]
Net earnings	$ 27,402	$ 26,279	$ 20,596
Unrealized gains (losses) on securities
Unrealized holding gains (losses) arising during the period	12,929	9,474	(3,543)
Unrealized gains on held to maturity securities transferred to available for sale	2,265
Amortization of net unrealized gains on held to maturity securities	46	18	32
Reclassification adjustment for net losses included in net earnings		22	50
Tax effect	(3,193)	(2,012)	734
Unrealized gains (losses) on securities, net of tax	12,047	7,502	(2,727)
Unrealized holding (losses) gains arising during the period on interest rate swaps	(625)	(133)	178
Total other comprehensive income (loss)	11,422	7,369	(2,549)
Comprehensive income	$ 38,824	$ 33,648	$ 18,047