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	22,003		$ 6	21,997				22,003
Shares issued under employee stock plans (in shares)			571
Shares repurchased under provisions of stock repurchase plan	(283,240)		$ (40)	(35,799)	(247,401)			(283,240)
Shares repurchased under provisions of stock repurchase plan (in shares)			(4,000)
Stock compensation expense	11,156			11,156				11,156
Net earnings	122,782				122,344			122,344		438
Other comprehensive income loss	(38,849)						(38,559)	(38,559)		(290)
Dividends paid				125	(125)
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
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	$ 18,482		$ 4	18,478				18,482
Shares issued under employee stock plans (in shares)			439
Shares repurchased under provisions of stock repurchase plan	(85,997)		$ (9)	(85,988)				(85,997)
Shares repurchased under provisions of stock repurchase plan (in shares)			(925)
Stock compensation expense	11,185			11,185				11,185
Net earnings	287,950				287,220			287,220		730
Other comprehensive income loss	(16,197)						(15,733)	(15,733)		(464)
Dividends paid				98	(98)
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		168,808