Condensed Consolidated Statements of Equity - USD ($) shares in Thousands, $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Common Stock	Additional paid-in capital	Retained earnings	Retained earnings Cumulative Effect, Period of Adoption, Adjustment	Accumulated other comprehensive loss	Total shareholders' equity	Total shareholders' equity Cumulative Effect, Period of Adoption, Adjustment	Noncontrolling interest
Balance at Dec. 31, 2019	$ 2,197,219	$ 6,074	$ 1,696	$ 3,203	$ 2,321,316	$ 6,074	$ (131,187)	$ 2,195,028	$ 6,074	$ 2,191
Balance (in shares) at Dec. 31, 2019			169,622
Increase (Decrease) in Equity [Roll Forward]
Shares issued under employee stock plans	42,020		$ 16	42,004				42,020
Shares issued under employee stock plans (in shares)			1,594
Shares repurchased under provisions of stock repurchase plan	(314,225)		$ (44)	(66,780)	(247,401)			(314,225)
Shares repurchased under provisions of stock repurchase plan (in shares)			(4,400)
Stock compensation expense	32,794			32,794				32,794
Net earnings	306,970				306,213			306,213		757
Other comprehensive income (loss)	(22,439)						(21,971)	(21,971)		(468)
Dividends paid	(86,815)			1,000	(87,815)			(86,815)
Balance at Jun. 30, 2020	2,161,598		$ 1,668	12,221	2,298,387		(153,158)	2,159,118		2,480
Balance (in shares) at Jun. 30, 2020			166,816
Balance at Mar. 31, 2020	2,037,145		$ 1,662	682	2,202,208		(169,746)	2,034,806		2,339
Balance (in shares) at Mar. 31, 2020			166,193
Increase (Decrease) in Equity [Roll Forward]
Shares issued under employee stock plans	20,017		$ 10	20,007				20,017
Shares issued under employee stock plans (in shares)			1,023
Shares repurchased under provisions of stock repurchase plan	(30,985)		$ (4)	(30,981)				(30,985)
Shares repurchased under provisions of stock repurchase plan (in shares)			(400)
Stock compensation expense	21,638			21,638				21,638
Net earnings	184,188				183,869			183,869		319
Other comprehensive income (loss)	16,410						16,588	16,588		(178)
Dividends paid	(86,815)			875	(87,690)			(86,815)
Balance at Jun. 30, 2020	2,161,598		$ 1,668	12,221	2,298,387		(153,158)	2,159,118		2,480
Balance (in shares) at Jun. 30, 2020			166,816
Balance at Dec. 31, 2020	$ 2,663,227		$ 1,693	157,496	2,600,201		(99,753)	2,659,637		3,590
Balance (in shares) at Dec. 31, 2020	169,294		169,294
Increase (Decrease) in Equity [Roll Forward]
Shares issued under employee stock plans	$ 27,300		$ 13	27,287				27,300
Shares issued under employee stock plans (in shares)			1,300
Shares repurchased under provisions of stock repurchase plan	(148,469)		$ (14)	(148,455)				(148,469)
Shares repurchased under provisions of stock repurchase plan (in shares)			(1,425)
Stock compensation expense	42,094			42,094				42,094
Net earnings	604,924				603,592			603,592		1,332
Other comprehensive income (loss)	(7,038)						(6,313)	(6,313)		(725)
Dividends paid	(98,387)			935	(99,322)			(98,387)
Balance at Jun. 30, 2021	$ 3,083,651		$ 1,692	79,357	3,104,471		(106,066)	3,079,454		4,197
Balance (in shares) at Jun. 30, 2021	169,169		169,169
Balance at Mar. 31, 2021	$ 2,878,650		$ 1,688	101,269	2,887,323		(115,486)	2,874,794		3,856
Balance (in shares) at Mar. 31, 2021			168,808
Increase (Decrease) in Equity [Roll Forward]
Shares issued under employee stock plans	8,818		$ 9	8,809				8,818
Shares issued under employee stock plans (in shares)			861
Shares repurchased under provisions of stock repurchase plan	(62,472)		$ (5)	(62,467)				(62,472)
Shares repurchased under provisions of stock repurchase plan (in shares)			(500)
Stock compensation expense	30,909			30,909				30,909
Net earnings	316,974				316,372			316,372		602
Other comprehensive income (loss)	9,159						9,420	9,420		(261)
Dividends paid	(98,387)			837	(99,224)			(98,387)
Balance at Jun. 30, 2021	$ 3,083,651		$ 1,692	$ 79,357	$ 3,104,471		$ (106,066)	$ 3,079,454		$ 4,197
Balance (in shares) at Jun. 30, 2021	169,169		169,169