Condensed Consolidated Statements Of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Condensed Consolidated Statements Of Comprehensive Income (Loss) [Abstract]
Net (loss) income	$ (1,818)	$ (1,330)	$ (3,838)	$ 29,958
Other comprehensive income (loss): Defined benefit pension plans:
Amortization of prior service costs	3	(35)	8	(105)
Amortization of actuarial loss	258	148	774	515
Other comprehensive income	261	113	782	410
Comprehensive (loss) income	$ (1,557)	$ (1,217)	$ (3,056)	$ 30,368