Condensed Consolidated Statements of Comprehensive Income (Loss) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Statement of Comprehensive Income [Abstract]
Other Comprehensive Income (Loss), Unrealized gain (loss) on equity securities, tax	$ 0	$ 686	$ 0	$ 939
Other Comprehensive Income (Loss), Reclassification adjustments for impairment of equity securities, tax	0	(423)	0	(1,768)
Other Comprehensive Income (Loss), Reclassification adjustments for realized loss on sale of equity securities, tax	$ 0	$ (140)	$ 0	$ (150)