CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Net loss	$ (50,108)	$ (66,339)	$ (156,851)	$ (199,995)
Other comprehensive income (loss):
Net unrealized gains (losses) on marketable securities		(5)		(17)
Cumulative translation adjustment	120	(4)	122	(30)
Amortization of prior service cost included in net periodic pension cost	40		122
Other comprehensive income (loss)	160	(9)	244	(47)
Comprehensive loss	$ (49,948)	$ (66,348)	$ (156,607)	$ (200,042)