Condensed Consolidated Statements of Comprehensive Loss (Unaudited) (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 Comprehensive Income [Abstract]
Net loss attributable to common shareholders	$ (59,998)	$ (10,206)	$ (98,027)	$ (30,180)
Other comprehensive income (loss), net of tax:
Change in foreign currency translation	367	1,960	(1,395)	2,570
Available for sale investments:
Change in other unrealized gains, net	40	322	1,869	5,527
Less: reclassification adjustments for gains included in net loss, net of tax	0	0	(4,593)	0
Comprehensive loss	$ (59,591)	$ (7,924)	$ (102,146)	$ (22,083)