CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	Accumulated Other Comprehensive (Loss) Income	Common Stock Par Value	Treasury Stock	Capital in Excess of Par Value	Non- Controlling Interest
Increase (Decrease) in Stockholders' Equity
Adoption of CECL standard	$ 1,422,871		$ 1,371,826		$ (310,504)	$ 673	$ (318,208)	$ 678,769	$ 315
Balance at Dec. 31, 2018	1,422,871		1,371,826		(310,504)	673	(318,208)	678,769	315
Increase (Decrease) in Stockholders' Equity
Net Income	193,689		193,669						20
Adoption of CECL standard	1,553,979		1,371,826		(351,672)	685	(318,208)	678,769	323
Foreign currency translation adjustments	(42,737)				(42,725)				(12)
Changes in unrecognized pension gains (losses) and related amortization, net of tax	2,150				2,150
Changes in derivative gains (losses), net of tax	(593)				(593)
Stock awards and option exercises	100,667					12	22,436	78,219
Cash dividends declared on common stock	(67,195)		(67,195)
Treasury stock purchased	(54,873)						(54,873)
Balance at Sep. 30, 2019	1,553,979		1,498,300		(351,672)	685	(350,645)	756,988	323
Increase (Decrease) in Stockholders' Equity
Adoption of CECL standard	1,581,422		1,464,607		(310,136)	683	(317,380)	743,332	316
Balance at Jun. 30, 2019	1,581,422		1,464,607		(310,136)	683	(317,380)	743,332	316
Increase (Decrease) in Stockholders' Equity
Net Income	56,769		56,750						19
Adoption of CECL standard	1,553,979		1,498,300		(351,672)	685	(350,645)	756,988	323
Foreign currency translation adjustments	(42,540)				(42,528)				(12)
Changes in unrecognized pension gains (losses) and related amortization, net of tax	713				713
Changes in derivative gains (losses), net of tax	279				279
Stock awards and option exercises	16,170					2	2,512	13,656
Cash dividends declared on common stock	(23,057)		(23,057)
Treasury stock purchased	(35,777)						(35,777)
Balance at Sep. 30, 2019	1,553,979		1,498,300		(351,672)	685	(350,645)	756,988	323
Increase (Decrease) in Stockholders' Equity
Adoption of CECL standard	1,553,979		1,498,300		(351,672)	685	(350,645)	756,988	323
Adoption of CECL standard	1,572,252		1,523,820		(341,948)	686	(381,238)	770,596	336
Adoption of CECL standard | Accounting Standards Update 2016-13		$ (1,377)		$ (1,377)
Balance at Dec. 31, 2019	1,572,252		1,523,820		(341,948)	686	(381,238)	770,596	336
Balance (Accounting Standards Update 2016-13) at Dec. 31, 2019		(1,377)		(1,377)
Increase (Decrease) in Stockholders' Equity
Net Income	160,845		160,808						37
Adoption of CECL standard	1,759,955		1,613,891		(317,424)	686	(381,238)	827,273	383
Adoption of CECL standard | Accounting Standards Update 2016-13		$ (1,377)		$ (1,377)
Foreign currency translation adjustments	19,292				19,282				10
Changes in unrecognized pension gains (losses) and related amortization, net of tax	4,639				4,639
Changes in derivative gains (losses), net of tax	603				603
Stock awards and option exercises	73,061					7	16,377	56,677
Cash dividends declared on common stock	(69,360)		(69,360)
Balance at Sep. 30, 2020	1,759,955		1,613,891		(317,424)	693	(364,861)	827,273	383
Increase (Decrease) in Stockholders' Equity
Adoption of CECL standard	1,645,986		1,573,392		(361,256)	690	(370,706)	803,511	355
Balance at Jun. 30, 2020	1,645,986		1,573,392		(361,256)	690	(370,706)	803,511	355
Increase (Decrease) in Stockholders' Equity
Net Income	63,735		63,716						19
Adoption of CECL standard	1,759,955		1,613,891		(317,424)	693	(364,861)	827,273	383
Foreign currency translation adjustments	42,425				42,416				9
Changes in unrecognized pension gains (losses) and related amortization, net of tax	1,563				1,563
Changes in derivative gains (losses), net of tax	(147)				(147)
Stock awards and option exercises	29,610					3	5,845	23,762
Cash dividends declared on common stock	(23,217)		(23,217)
Balance at Sep. 30, 2020	1,759,955		1,613,891		(317,424)	693	(364,861)	827,273	383
Increase (Decrease) in Stockholders' Equity
Adoption of CECL standard	$ 1,759,955		$ 1,613,891		$ (317,424)	$ 693	$ (364,861)	$ 827,273	$ 383