Condensed Consolidated Statement of Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	ASU No. 2016-13 - Measurement of Credit Losses on Financial Instruments (Topic 326)	Common Stock	Capital in Excess of Par Value	Retained Earnings	Retained Earnings ASU No. 2016-13 - Measurement of Credit Losses on Financial Instruments (Topic 326)	Treasury Stock	Deferred Compensation Obligation	Accumulated Other Comprehensive Income (Loss)	Non- controlling Interests
Balance — (in shares) at Dec. 31, 2018			176,793				46,237
Balance — at Dec. 31, 2018	$ 1,632,002		$ 220,991	$ 494,551	$ 3,514,229		$ (2,049,404)	$ 7,117	$ (573,947)	$ 18,465
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock activity under stock plans (in shares)							298
Stock activity under stock plans	(3,273)			(17,129)			$ 12,696	1,160
Stock-based compensation	22,508			22,508
Net earnings	172,902									6,659
Net earnings	166,243
Cash dividends declared	(75,756)				(75,756)
Other comprehensive income (loss), net of tax	(19,303)								(19,902)	599
Other, net	(254)							0		(254)
Repurchases of common shares (in shares)							(114)
Repurchases of common shares	(5,432)						$ (5,432)
Balance — (in shares) at Sep. 30, 2019			176,793				46,053
Balance — at Sep. 30, 2019	1,723,394		$ 220,991	499,930	3,604,716		$ (2,042,140)	8,277	(593,849)	25,469
Balance — (in shares) at Dec. 31, 2018			176,793				46,237
Balance — at Dec. 31, 2018	$ 1,632,002		$ 220,991	494,551	3,514,229		$ (2,049,404)	7,117	(573,947)	18,465
Balance — (in shares) at Dec. 31, 2019	176,793		176,793				46,262
Balance — at Dec. 31, 2019	$ 1,772,341	$ (7,291)	$ 220,991	501,045	3,652,244	$ (7,291)	$ (2,051,583)	8,334	(584,292)	25,602
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accounting Standards Update	us-gaap:AccountingStandardsUpdate201613Member
Balance — (in shares) at Jun. 30, 2019			176,793				45,943
Balance — at Jun. 30, 2019	$ 1,711,979		$ 220,991	493,037	3,570,119		$ (2,036,857)	8,219	(567,007)	23,477
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock activity under stock plans (in shares)							4
Stock activity under stock plans	(53)			(260)			$ 149	58
Stock-based compensation	7,153			7,153
Net earnings	61,963				59,842					2,121
Net earnings	59,842
Cash dividends declared	(25,245)				(25,245)
Other comprehensive income (loss), net of tax	(26,908)								(26,842)	(66)
Other, net	(63)							0		(63)
Repurchases of common shares (in shares)							(114)
Repurchases of common shares	(5,432)						$ (5,432)
Balance — (in shares) at Sep. 30, 2019			176,793				46,053
Balance — at Sep. 30, 2019	$ 1,723,394		$ 220,991	499,930	3,604,716		$ (2,042,140)	8,277	(593,849)	25,469
Balance — (in shares) at Dec. 31, 2019	176,793		176,793				46,262
Balance — at Dec. 31, 2019	$ 1,772,341	$ (7,291)	$ 220,991	501,045	3,652,244	$ (7,291)	$ (2,051,583)	8,334	(584,292)	25,602
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock activity under stock plans (in shares)							544
Stock activity under stock plans	(3,793)			(25,588)			$ 24,029	(2,234)
Stock-based compensation	24,104			24,104
Net earnings	66,323									6,890
Net earnings	59,433
Cash dividends declared	(79,095)				(79,095)
Other comprehensive income (loss), net of tax	(33,792)								(34,564)	772
Other, net	(2,842)									(2,842)
Repurchases of common shares (in shares)							(1,057)
Repurchases of common shares	$ (32,112)						$ (32,112)
Balance — (in shares) at Sep. 30, 2020	176,793		176,793				46,775
Balance — at Sep. 30, 2020	$ 1,703,843		$ 220,991	499,561	3,625,291		$ (2,059,666)	6,100	(618,856)	30,422
Balance — (in shares) at Jun. 30, 2020			176,793				46,873
Balance — at Jun. 30, 2020	1,647,172		$ 220,991	499,152	3,600,645		$ (2,064,302)	6,036	(643,129)	27,779
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock activity under stock plans (in shares)							98
Stock activity under stock plans	(520)			(5,220)			$ 4,636	64
Stock-based compensation	5,629			5,629
Net earnings	53,650				51,003					2,647
Net earnings	51,003
Cash dividends declared	(26,357)				(26,357)
Other comprehensive income (loss), net of tax	24,269								24,273	(4)
Other, net	$ 0							0		0
Balance — (in shares) at Sep. 30, 2020	176,793		176,793				46,775
Balance — at Sep. 30, 2020	$ 1,703,843		$ 220,991	$ 499,561	$ 3,625,291		$ (2,059,666)	$ 6,100	$ (618,856)	$ 30,422