Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Consolidated Statements of Comprehensive Income (Loss) [Abstract]
Net income (loss)	$ 6,526	$ 21,863	$ 13,429
Other comprehensive income (loss):
Change in net actuarial gain (loss)	(145)	43	(1,723)
Tax effect on change in net actuarial gain (loss)	51	(15)	603
Unrealized holding (losses) gains arising during the period	6,019	(10,191)	3,543
Tax effect on unrealized holding (losses) gains arising during the period	(2,107)	3,567	(1,240)
Reclassification adjustment for gains included in net realized gains	(1,331)	(5,826)	(408)
Tax effect on reclassification adjustment for gains included in income tax expense	466	2,039	143
Other comprehensive income (loss), net of tax	2,953	(10,383)	918
Comprehensive income (loss)	$ 9,479	$ 11,480	$ 14,347