Condensed Consolidated Statements Of Comprehensive Income (Loss) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Condensed Consolidated Statements Of Comprehensive Income (Loss) [Abstract]
Net income (loss)	$ 31,537	$ (9)	$ 31,288	$ (680)
Defined benefit pension plans:
Amortizaion of prior service costs	(35)	(68)	(70)	(137)
Amortization of actuarial loss	184	213	367	427
Other comprehensive income	149	145	297	290
Comprehensive income (loss)	$ 31,686	$ 136	$ 31,585	$ (390)