Consolidated Statements of Comprehensive (Loss) Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Consolidated Statements of Comprehensive Income [Abstract]
Net (loss) income	$ (28,004)	$ 5,287	$ (85,613)	$ 33,341
Other comprehensive income (loss):
Change in net actuarial gain	35	36	104	108
Tax effect on change in net actuarial gain	(8)	(8)	(22)	(23)
Unrealized holding gains arising during the period	2,706	1,777	4,149	13,010
Tax effect on unrealized holding gains arising during the period	(568)	(373)	(872)	(2,732)
Reclassification adjustment for gains included in net (loss) income	(390)	(175)	(5,612)	(4,376)
Tax effect on reclassification adjustment for gains included in net (loss) income	82	36	1,179	919
Other comprehensive income (loss), net of tax	1,857	1,293	(1,074)	6,906
Comprehensive (loss) income	$ (26,147)	$ 6,580	$ (86,687)	$ 40,247