Consolidated Statements of Comprehensive Loss (unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Statement of Comprehensive Income [Abstract]
Net loss	$ (4,898)	$ 1,666	$ (5,207)	$ (1,257)
Other comprehensive (loss) income, net of tax:
Net change in unrealized (loss) gains on securities available-for-sale	(2,025)	(673)	(6,946)	2,877
Net change in unrealized gain on derivative instruments	(35)	11	(434)	134
Other comprehensive (loss) income, before tax	(1,990)	(684)	(6,512)	2,743
Income tax effect related to items of other comprehensive (loss) income	418	240	1,368	(960)
Total other comprehensive (loss) income, net of tax	(1,572)	(444)	(5,144)	1,783
Total comprehensive loss	$ (6,470)	$ 1,222	$ (10,351)	$ 526