Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Consolidated Statements of Comprehensive Income (Loss) [Abstract]
Net Income (Loss)	$ (6,872)	$ 9,292
Other Comprehensive Income (Loss), Net of Tax:
Amortization of actuarial losses	876	247
Actuarial gains (losses)	(1,050)	5,100
Total other comprehensive income (loss), net of tax	(174)	5,347
Total Comprehensive Income (Loss)	$ (7,046)	$ 14,639