CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE 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
Net loss	$ (56,921)	$ (68,985)	$ (106,743)	$ (133,655)
Other comprehensive income (loss):
Net unrealized gains (losses) on marketable securities		(7)		(12)
Cumulative translation adjustment	3	(49)	2	(26)
Amortization of prior service cost included in net periodic pension cost	41		82
Other comprehensive income (loss)	44	(56)	84	(38)
Comprehensive loss	$ (56,877)	$ (69,041)	$ (106,659)	$ (133,693)