Condensed Consolidated Statement of Shareholders' Equity - USD ($)	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		176,793,000			46,237,000
Balance — at Dec. 31, 2018	$ 1,660,780,000	$ 220,991,000	$ 494,551,000	$ 3,543,007,000	$ (2,049,404,000)	$ 7,117,000	$ (573,947,000)	$ 18,465,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock activity under stock plans (in shares)					268,000
Stock activity under stock plans	(2,670,000)		(14,488,000)		$ 11,818,000
Stock-based compensation	7,610,000		7,610,000
Net earnings	59,496,000			57,261,000				2,235,000
Cash dividends declared	(25,254,000)			(25,254,000)
Other comprehensive income (loss), net of tax	8,224,000						7,547,000	677,000
Other, net	(200,000)					(10,000)		(190,000)
Net Income (Loss) Attributable to Parent	57,261,000
Balance — (in shares) at Mar. 31, 2019		176,793,000			45,969,000
Balance — at Mar. 31, 2019	$ 1,707,986,000	$ 220,991,000	487,673,000	3,575,014,000	$ (2,037,586,000)	7,107,000	(566,400,000)	21,187,000
Balance — (in shares) at Dec. 31, 2019	176,793,000	176,793,000			46,262,000
Balance — at Dec. 31, 2019	$ 1,815,959,000	$ 220,991,000	501,045,000	3,695,862,000	$ (2,051,583,000)	8,334,000	(584,292,000)	25,602,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock activity under stock plans (in shares)					317,000
Stock activity under stock plans	(3,003,000)		(17,635,000)		$ 14,632,000
Stock-based compensation	14,311,000		14,311,000
Net earnings	1,490,000			(610,000)				2,100,000
Cash dividends declared	(26,382,000)			(26,382,000)
Repurchases of common shares (in shares)					(1,057,000)
Repurchases of common shares	(32,112,000)				$ (32,112,000)
Other comprehensive income (loss), net of tax	(74,990,000)						(75,830,000)	840,000
Other, net	(2,557,000)					(10,000)		(2,547,000)
Net Income (Loss) Attributable to Parent	$ (610,000)
Balance — (in shares) at Mar. 31, 2020	176,793,000	176,793,000			47,002,000
Balance — at Mar. 31, 2020	$ 1,685,425,000	$ 220,991,000	$ 497,721,000	$ 3,661,579,000	$ (2,069,063,000)	$ 8,324,000	$ (660,122,000)	$ 25,995,000