UNAUDITED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Statement of Comprehensive Income [Abstract]
Tax (benefit) associated with Net Investment Hedges	$ (34,586)	$ 14,208	$ 42,019	$ 15,345
Tax (benefit) associated with gain (loss) on marketable securities	$ (11,596)	$ 5	$ (1,620)	$ 54