CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Net loss	$ (55,451)	$ (50,108)	$ (171,285)	$ (156,851)
Other comprehensive income (loss):
Cumulative translation adjustment	(327)	120	(168)	122
Unrealized gain on marketable securities, net of tax	9,052		9,052
Amortization of prior service cost included in net periodic pension cost	82	40	(336)	122
Other comprehensive income (loss)	8,807	160	8,548	244
Comprehensive loss	$ (46,644)	$ (49,948)	$ (162,737)	$ (156,607)