UNAUDITED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2015	Mar. 31, 2014
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Net income		$ 333,327	$ 331,218
Other comprehensive income, net of tax
Foreign currency translation adjustments	[1]	(127,011)	7,914
Unrealized gain on marketable securities	[2]	162,368	108
Comprehensive income		$ 368,684	$ 339,240

[1] Net of tax of $76,605 and $1,137 for the three months ended March 31, 2015 and 2014, respectively, associated with net investment hedges. See Note 11.

[2] Net of tax of $9,976 and $49 for the three months ended March 31, 2015 and 2014, respectively. Net gains realized during the three months ended March 31, 2015 were not significant. There were no realized gains or losses related to investments for the three months ended March 31, 2014.