Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 1,391,042	$ 1,324,487	$ 1,133,804
Other comprehensive income:
Foreign currency translation adjustments	4,890	0	0
Total other comprehensive income	4,890	0	0
Comprehensive income	$ 1,395,932	$ 1,324,487	$ 1,133,804