Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Consolidated Statements of Comprehensive Income [Abstract]
Net (loss) income	$ 647	$ 3,986
Other comprehensive income:
Change in net actuarial gain	27	35
Tax effect on change in net actuarial gain	(6)	(12)
Unrealized holding gains arising during the period	(395)	5,246
Tax effect on unrealized holding gains arising during the period	83	(1,836)
Reclassification adjustment for (gains) losses included in net income	15	(2,501)
Tax effect on reclassification adjustment for losses (gains) included in net income	(3)	875
Other comprehensive (loss) income, net of tax	(279)	1,807
Comprehensive (loss) income	$ 368	$ 5,793