CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net income, as reported	$ 229,004	$ 141,003	$ 233,417	$ 236,254
Other comprehensive (loss) income:
Change in foreign currency translation adjustment	2,360	510	(7,620)	612
Available-for-sale investments:
Other comprehensive (loss) income	2,360	510	(7,620)	612
Comprehensive (loss) income	$ 231,364	$ 141,513	$ 225,797	$ 236,866