Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Consolidated Statements of Comprehensive Income (Loss) [Abstract]
Net income (loss)	$ 9,345	$ (64,310)
Other comprehensive (loss) income:
Change in net actuarial gain	43	34
Tax effect on change in net actuarial gain	(9)	(7)
Unrealized holding gains (losses) arising during the period	585	(6,987)
Tax effect on unrealized holding (gains) losses arising during the period	(123)	1,467
Reclassification adjustment for gains included in net income (loss)	(1,403)	(5,636)
Tax effect on reclassification adjustment for gains included in net income (loss)	295	1,184
Other comprehensive loss, net of tax	(612)	(9,945)
Comprehensive income (loss)	$ 8,733	$ (74,255)