Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Statement of Comprehensive Income [Abstract]
Net earnings (loss)	$ 1,666	$ 2,398	$ (1,257)	$ 7,240
Unrealized gains (losses) on securities available-for-sale:
Unrealized holding (losses) gains arising during the year	(335)	(645)	3,224	4,217
Less: reclassification adjustment for gains on sales of securities available-for-sale	(338)	0	(347)	(20)
Net change in unrealized gains (losses) on securities available-for-sale	(673)	(645)	2,877	4,197
Unrealized gain on derivative instruments designated as cash flow hedges:
Unrealized holding (losses) gains on derivatives arising during the period	(7)	55	(130)	55
Less: reclassification adjustment for gains on derivative instruments	(4)	0	(4)	0
Net change in unrealized gain on derivative instruments	(11)	55	(134)	55
Total other comprehensive (loss) income, before tax	(684)	(590)	2,743	4,252
Income tax effect related to items of other comprehensive (loss) income	240	206	(960)	(1,488)
Total other comprehensive (loss) income, net of tax	(444)	(384)	1,783	2,764
Total comprehensive income	$ 1,222	$ 2,014	$ 526	$ 10,004