Consolidated Statements of Comprehensive Loss (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Net loss	$ (36,084)	$ (53,278)
Unrealized Gain (Loss) on Investments [Abstract]
Unrealized gains (losses) arising during the period	936	(656)
Reclassification adjustment for amounts included in net loss	424	997
Foreign currency translation adjustments	10	565
Equity in other comprehensive income of investee	642	895
Recognition of currency translation gain on liquidation of subsidiaries	(7,227)	0
Other comprehensive (loss) income	(5,215)	1,801
Comprehensive loss	(41,299)	(51,477)
Less: comprehensive income (loss) attributable to noncontrolling interests in consolidated subsidiaries	723	(1,159)
Comprehensive loss attributable to common shareholders	$ (42,022)	$ (50,318)