Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Net income	$ 132,348	$ 47,177	$ 317,769	$ 135,980
Other comprehensive income, net of tax:
Unrealized gain on marketable securities, available for sale			39
Total comprehensive income	$ 132,348	$ 47,177	$ 317,808	$ 135,980