Consolidated Statements Of Comprehensive Income (Loss) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Consolidated Statements Of Comprehensive Income (Loss) [Abstract]
Net income (loss)	$ 29,434	$ (646)
Other comprehensive income (loss): Defined benefit pension plans:
Net actuarial gain (loss)	(3,106)	1,960
Amortizaion of prior service costs	(141)	(274)
Amortization of actuarial gain	686	877
Other comprehensive income (loss)	(2,561)	2,563
Comprehensive income	$ 26,873	$ 1,917