Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock and Additional Paid-in Capital	Accumulated Other Comprehensive Loss	Retained Earnings
Beginning Balance at Dec. 31, 2018	$ 5,238,765	$ 2,315,988	$ (19,582)	$ 2,942,359
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of options		22,585
Stock-based compensation expense		101,200
Other comprehensive loss			(6,018)
Net income	344,052			344,052
Ending Balance at Mar. 31, 2019	5,703,058	2,439,773	(25,600)	3,288,885
Beginning Balance at Dec. 31, 2019	7,582,157	2,793,929	(23,521)	4,811,749
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of options		44,584
Stock-based compensation expense		97,019
Other comprehensive loss			(23,533)
Net income	709,067			709,067
Ending Balance at Mar. 31, 2020	$ 8,409,294	$ 2,935,532	$ (47,054)	$ 5,520,816