Condensed Consolidated Statement of Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Capital in Excess of Par Value	Retained Earnings	Treasury Stock	Deferred Compensation Obligation	Accumulated Other Comprehensive Loss	Noncontrolling Interests
Balance — (in shares) at Dec. 31, 2018		176,793			46,237
Balance — at Dec. 31, 2018	$ 1,660,780	$ 220,991	$ 494,551	$ 3,543,007	$ (2,049,404)	$ 7,117	$ (573,947)	$ 18,465
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock activity under stock plans (in shares)					294
Stock activity under stock plans	(4,322)		(16,869)		$ 12,547
Stock-based compensation	15,355		15,355
Net earnings	119,971							4,538
Cash dividends declared	(50,512)			(50,512)
Other comprehensive income (loss), net of tax	7,605						6,940	665
Other, net	911					1,102		(191)
Net earnings	115,433
Balance — (in shares) at Jun. 30, 2019		176,793			45,943
Balance — at Jun. 30, 2019	1,749,788	$ 220,991	493,037	3,607,928	$ (2,036,857)	8,219	(567,007)	23,477
Balance — (in shares) at Mar. 31, 2019		176,793			45,969
Balance — at Mar. 31, 2019	1,707,986	$ 220,991	487,673	3,575,014	$ (2,037,586)	7,107	(566,400)	21,187
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock activity under stock plans (in shares)					26
Stock activity under stock plans	(1,653)		(2,382)		$ 729
Stock-based compensation	7,746		7,746
Net earnings	60,474			58,172				2,302
Cash dividends declared	(25,258)			(25,258)
Other comprehensive income (loss), net of tax	(619)						(607)	(12)
Other, net	1,112					1,112		0
Net earnings	58,172
Balance — (in shares) at Jun. 30, 2019		176,793			45,943
Balance — at Jun. 30, 2019	1,749,788	$ 220,991	493,037	3,607,928	$ (2,036,857)	8,219	(567,007)	23,477
Increase (Decrease) in Stockholders' Equity [Roll Forward]
ASU No. 2016-13 - Measurement of Credit Losses on Financial Instruments (Topic 326)	$ (7,291)			(7,291)
Balance — (in shares) at Dec. 31, 2019	176,793	176,793			46,262
Balance — at Dec. 31, 2019	$ 1,815,959	$ 220,991	501,045	3,695,862	$ (2,051,583)	8,334	(584,292)	25,602
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock activity under stock plans (in shares)					446
Stock activity under stock plans	(3,273)		(20,368)		$ 19,393	(2,298)
Stock-based compensation	18,475		18,475
Net earnings	12,277							4,242
Cash dividends declared	(52,738)			(52,738)
Repurchases of common shares (in shares)					(1,057)
Repurchases of common shares	(32,112)				$ (32,112)
Other comprehensive income (loss), net of tax	(58,104)						(58,881)	777
Other, net	(2,842)							(2,842)
Net earnings	$ 8,035
Balance — (in shares) at Jun. 30, 2020	176,793	176,793			46,873
Balance — at Jun. 30, 2020	$ 1,690,351	$ 220,991	499,152	3,643,868	$ (2,064,302)	6,036	(643,173)	27,779
Balance — (in shares) at Mar. 31, 2020		176,793			47,002
Balance — at Mar. 31, 2020	1,685,425	$ 220,991	497,721	3,661,579	$ (2,069,063)	8,324	(660,122)	25,995
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock activity under stock plans (in shares)					129
Stock activity under stock plans	(260)		(2,733)		$ 4,761	(2,288)
Stock-based compensation	4,164		4,164
Net earnings	10,787			8,645				2,142
Cash dividends declared	(26,356)			(26,356)
Repurchases of common shares (in shares)					0
Repurchases of common shares	0				$ 0
Other comprehensive income (loss), net of tax	16,886						16,949	(63)
Other, net	(295)					0		(295)
Net earnings	$ 8,645
Balance — (in shares) at Jun. 30, 2020	176,793	176,793			46,873
Balance — at Jun. 30, 2020	$ 1,690,351	$ 220,991	$ 499,152	$ 3,643,868	$ (2,064,302)	$ 6,036	$ (643,173)	$ 27,779