CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net income, as reported	$ 184,219	$ 229,004	$ 348,097	$ 233,417
Other comprehensive income (loss):
Change in foreign currency translation adjustment	966	2,360	7,401	(7,620)
Other comprehensive income (loss)	966	2,360	7,401	(7,620)
Comprehensive income	$ 185,185	$ 231,364	$ 355,498	$ 225,797