CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Common stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury stock	Total
Balance at Dec. 31, 2020	$ 3,193	$ 4,537,982	$ 6,432,074	$ 3,034	$ (5,815,423)	$ 5,160,860
Balance (in shares) at Dec. 31, 2020	638,662				(110,565)
Increase (Decrease) in Stockholders' Equity
Stock-based compensation	$ 0	17,949	0	0	$ 0	17,949
Exercise of stock options	$ 3	6,758	0	0	$ 0	6,761
Exercise of stock options (in shares)	492				0
Unrealized gain, net on available-for-sale securities	$ 0	0	0	24	$ 0	24
Repurchase of common stock	$ 0	0	0	0	$ (13,419)	(13,419)
Repurchase of common stock (in shares)	0				(150)
Foreign currency translation	$ 0	0	0	(27,932)	$ 0	(27,932)
Net income	0	0	315,194	0	0	315,194
Balance at Mar. 31, 2021	$ 3,196	4,562,689	6,747,268	(24,874)	$ (5,828,842)	5,459,437
Balance (in shares) at Mar. 31, 2021	639,154				(110,715)
Balance at Dec. 31, 2020	$ 3,193	4,537,982	6,432,074	3,034	$ (5,815,423)	5,160,860
Balance (in shares) at Dec. 31, 2020	638,662				(110,565)
Increase (Decrease) in Stockholders' Equity
Net income						718,956
Balance at Jun. 30, 2021	$ 3,198	4,597,333	7,151,030	(16,822)	$ (5,829,241)	5,905,498
Balance (in shares) at Jun. 30, 2021	639,576				(110,719)
Balance at Mar. 31, 2021	$ 3,196	4,562,689	6,747,268	(24,874)	$ (5,828,842)	5,459,437
Balance (in shares) at Mar. 31, 2021	639,154				(110,715)
Increase (Decrease) in Stockholders' Equity
Stock-based compensation	$ 0	16,921	0	0	$ 0	16,921
Exercise of stock options	$ 2	17,723	0	0	$ 0	17,725
Exercise of stock options (in shares)	422				0
Unrealized loss, net on available-for-sale securities	$ 0	0	0	(183)	$ 0	(183)
Repurchase of common stock	$ 0	0	0	0	$ (399)	(399)
Repurchase of common stock (in shares)	0				(4)
Foreign currency translation	$ 0	0	0	8,235	$ 0	8,235
Net income	0	0	403,762	0	0	403,762
Balance at Jun. 30, 2021	$ 3,198	4,597,333	7,151,030	(16,822)	$ (5,829,241)	5,905,498
Balance (in shares) at Jun. 30, 2021	639,576				(110,719)
Balance at Dec. 31, 2021	$ 3,200	4,652,620	7,809,549	(69,165)	$ (5,829,253)	6,566,951
Balance (in shares) at Dec. 31, 2021	640,043				(110,720)
Increase (Decrease) in Stockholders' Equity
Stock-based compensation		16,175				16,175
Exercise of stock options	$ 3	4,507				4,510
Exercise of stock options (in shares)	485
Unrealized loss, net on available-for-sale securities				(4,059)		(4,059)
Repurchase of common stock					$ (12,187)	(12,187)
Repurchase of common stock (in shares)					(166)
Foreign currency translation				1,079		1,079
Net income			294,203			294,203
Balance at Mar. 31, 2022	$ 3,203	4,673,302	8,103,752	(72,145)	$ (5,841,440)	6,866,672
Balance (in shares) at Mar. 31, 2022	640,528				(110,886)
Balance at Dec. 31, 2021	$ 3,200	4,652,620	7,809,549	(69,165)	$ (5,829,253)	$ 6,566,951
Balance (in shares) at Dec. 31, 2021	640,043				(110,720)
Increase (Decrease) in Stockholders' Equity
Exercise of stock options (in shares)						520
Net income						$ 567,563
Balance at Jun. 30, 2022	$ 3,205	4,707,569	8,377,112	(152,957)	$ (6,125,751)	6,809,178
Balance (in shares) at Jun. 30, 2022	640,944				(114,172)
Balance at Mar. 31, 2022	$ 3,203	4,673,302	8,103,752	(72,145)	$ (5,841,440)	6,866,672
Balance (in shares) at Mar. 31, 2022	640,528				(110,886)
Increase (Decrease) in Stockholders' Equity
Stock-based compensation		16,157				16,157
Exercise of stock options	$ 2	18,110				18,112
Exercise of stock options (in shares)	416
Unrealized loss, net on available-for-sale securities				(1,105)		(1,105)
Repurchase of common stock					$ (284,311)	(284,311)
Repurchase of common stock (in shares)					(3,286)
Foreign currency translation				(79,707)		(79,707)
Net income			273,360			273,360
Balance at Jun. 30, 2022	$ 3,205	$ 4,707,569	$ 8,377,112	$ (152,957)	$ (6,125,751)	$ 6,809,178
Balance (in shares) at Jun. 30, 2022	640,944				(114,172)