Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Consolidated Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (886,899)	$ (1,854,718)	$ 257,817
Reclassification adjustment of unrealized net loss on available-for-sale securities, net			1,153
Change in cumulative translation adjustment, net of tax	(34,554)	(9,414)	(19,933)
Comprehensive income (loss)	$ (921,453)	$ (1,864,132)	$ 239,037