Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]	Total
Balance at Dec. 31, 2019	$ 3,757	$ 123,468	$ 160,570	$ 688	$ (25,201)
Equity based compensation		(570)
Shares issued under employee benefit plans					169
Shares issued under employee benefit plans		(169)
Net (loss) income			(57,609)			$ (57,609)
Additional minimum pension liability, net of tax				55
Unrealized holding gains (losses) arising during period, net of tax				1,139
Reclassification adjustment for gains included in net income (loss), net of tax				(4,125)
Ending balance at Jun. 30, 2020	3,757	122,729	102,961	(2,243)	(25,032)	202,172
Balance at Mar. 31, 2020	3,757	122,718	96,260	(9,257)	(25,032)
Equity based compensation		11
Net (loss) income			6,701			6,701
Additional minimum pension liability, net of tax				28
Unrealized holding gains (losses) arising during period, net of tax				6,659
Reclassification adjustment for gains included in net income (loss), net of tax				327
Ending balance at Jun. 30, 2020	3,757	122,729	102,961	(2,243)	(25,032)	202,172
Balance at Dec. 31, 2020	3,757	122,893	68,915	383	(25,026)	170,922
Equity based compensation		154
Shares issued under employee benefit plans					265
Shares issued under employee benefit plans		(265)
Net (loss) income			8,878			8,878
Additional minimum pension liability, net of tax				69
Unrealized holding gains (losses) arising during period, net of tax				2,202
Reclassification adjustment for gains included in net income (loss), net of tax				(3,341)
Ending balance at Jun. 30, 2021	3,757	122,782	77,793	(687)	(24,761)	178,884
Balance at Mar. 31, 2021	3,757	122,725	78,260	(229)	(24,761)
Equity based compensation		57
Net (loss) income			(467)			(467)
Additional minimum pension liability, net of tax				35
Unrealized holding gains (losses) arising during period, net of tax				1,740
Reclassification adjustment for gains included in net income (loss), net of tax				(2,233)
Ending balance at Jun. 30, 2021	$ 3,757	$ 122,782	$ 77,793	$ (687)	$ (24,761)	$ 178,884