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
Consolidated Statements of Comprehensive Income [Abstract]
Net (loss) income	$ (1,560)	$ 5,048	$ (924)	$ 10,188
Other comprehensive income:
Change in net actuarial gain	37	28	107	85
Tax effect on change in net actuarial gain	(13)	(10)	(37)	(30)
Unrealized holding gains arising during the period	308	2,039	8,208	7,767
Tax effect on unrealized holding gains arising during the period	(108)	(714)	(2,873)	(2,718)
Reclassification adjustment for (gains) losses included in net income	(3,188)	(1,105)	(5,679)	(1,589)
Tax effect on reclassification adjustment for losses (gains) included in net income	1,116	387	1,988	556
Other comprehensive (loss) income, net of tax	(1,848)	625	1,714	4,071
Comprehensive (loss) income	$ (3,408)	$ 5,673	$ 790	$ 14,259