Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Statement of Comprehensive Income [Abstract]
Net earnings	$ 360	$ 2,491
Unrealized (losses) gains on securities available-for-sale:
Unrealized holding (losses) gains arising during the year	(4,048)	820
Less: reclassification adjustment for gains on sales of securities available-for-sale	0	(6)
Net change in unrealized (losses) gains on securities available-for-sale	(4,048)	814
Unrealized gain on derivative instruments designated as cash flow hedges:
Unrealized holding gains on derivatives arising during the period	349	13
Less: reclassification adjustment for gains on derivative instruments	(40)	0
Net change in unrealized gain on derivative instruments	309	13
Total other comprehensive (loss) income, before tax	(3,739)	827
Income tax effect related to items of other comprehensive (loss) income	785	(290)
Total other comprehensive (loss) income, net of tax	(2,954)	537
Total comprehensive (loss) income	$ (2,594)	$ 3,028