Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 123,693	$ 111,090	[1]
Other comprehensive income:
Foreign currency translation gains, net of tax	93,614	31,202
Total other comprehensive income	93,614	31,202
Total comprehensive income	$ 217,307	$ 142,292

[1] Reflects the impact of the Company's adoption of Accounting Standards Update 2016-09, Compensation-Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting, to simplify several aspects of the accounting for share-based compensation, including the income tax consequences.