Consolidated Statements of Comprehensive Income (Loss) (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (63,154)	$ 2,217	$ (82,185)	$ (1,870)
Other comprehensive income (loss):
Amortization of accumulated actuarial gains or losses, pension	359	1,004	717	1,745
Amortization of accumulated actuarial gains or losses, transition obligations, and prior service costs, postretirement medical benefit	5	1,001	10	2,002
Tax effect of other comprehensive income gains	64	0	(224)	0
Change in foreign currency translation adjustment	9,477	0	9,477	0
Unrealized and realized gains and losses on available-for-sale securities	0	(39)	0	(39)
Other comprehensive income	9,905	1,966	9,980	3,708
Comprehensive income (loss) attributable to the Parent company	$ (53,249)	$ 4,183	$ (72,205)	$ 1,838