CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Statement of Other Comprehensive Income [Abstract]
Net loss	$ (19,430)	$ (8,757)	$ (59,492)	$ (28,554)
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, before Tax	14	(1,390)	(26)	4,410
Other Comprehensive Income (Loss), Reclassification Adjustment for Write-down of Securities Included in Net Income, before Tax	0	94	40	238
Other comprehensive income (loss), before taxes:
Total comprehensive loss	$ (19,416)	$ (10,053)	$ (59,478)	$ (23,906)