Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Consolidated Statements of Comprehensive Income (Loss) [Abstract]
Net Income (Loss)	$ (4,005)	$ (1,036)	$ 10,388	$ (5,584)
Other Comprehensive Income (Loss), Net of Tax:
Amortization of actuarial losses	63	158	188	473
Total other comprehensive income, net of tax	63	158	188	473
Total Comprehensive Income (Loss)	$ (3,942)	$ (878)	$ 10,576	$ (5,111)