Consolidated Statements of Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Statement of Comprehensive Income [Abstract]
Net loss	$ (48,020)	$ (49,134)	$ (99,749)	$ (131,318)
Other comprehensive income (loss):
Amortization of accumulated actuarial gains or losses, pension	996	361	3,263	1,078
Adjustments to accumulated actuarial losses and transition obligations, pension	(253)	(371)	(538)	(172)
Amortization of accumulated actuarial gains or losses, transition obligations, and prior service costs, postretirement medical benefit	327	3	981	13
Tax effect of other comprehensive income gains	(558)	(487)	(908)	(711)
Change in foreign currency translation adjustment	(20,802)	(14,642)	(43,018)	(5,364)
Unrealized and realized gains and losses on available-for-sale securities	165	1,231	(1,295)	1,231
Other comprehensive loss	(20,125)	(13,905)	(41,515)	(3,925)
Comprehensive loss attributable to the Parent company	$ (68,145)	$ (63,039)	$ (141,264)	$ (135,243)