CONDENSED CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Thousands	Total	Total Shareholders’ Equity	Common Stock and Additional Paid-In Capital	Retained Earnings	Cumulative Translation Adjustment	Retirement Benefits Adjustment	Cumulative Unrealized Gain (Loss) on Derivatives	Treasury Stock	Noncontrolling Interest
Balance at Dec. 31, 2019	$ 2,263,229		$ 761,352	$ 2,615,131	$ (94,353)	$ (25,809)	$ (7,183)	$ (985,909)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	101,998
Net income	101,998			101,998
Cumulative translation adjustment	(26,456)				(26,456)
Net change in retirement obligations (net of tax)	2,296					2,296
Net change on derivatives designated as cash flow hedges (net of tax)	1,194						1,194
Issuance of shares of common stock from issuance of unvested shares, performance share units and exercise of stock options (net of tax)	2,089							2,089
Repurchase of 866,823 shares of common stock	(108,907)							(108,907)
Shares surrendered for tax withholding	(12,119)							(12,119)
Share-based compensation	6,463		6,463
Balance at Mar. 31, 2020	2,229,787		767,815	2,717,129	(120,809)	(23,513)	(5,989)	(1,104,846)
Balance at Dec. 31, 2020	2,540,326	$ 2,540,203	776,054	2,841,546	13,430	(24,424)	(2,531)	(1,063,872)	$ 123
Balance at Dec. 31, 2020	2,540,203
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	112,672	112,708		112,708					(36)
Net income	112,708
Cumulative translation adjustment	(48,437)	(48,439)			(48,439)				2
Net change in retirement obligations (net of tax)	745	745				745
Net change on derivatives designated as cash flow hedges (net of tax)	664	664					664
Issuance of shares of common stock from issuance of unvested shares, performance share units and exercise of stock options (net of tax)	3,231	3,231						3,231
Shares surrendered for tax withholding	(5,460)	(5,460)						(5,460)
Share-based compensation	6,274	6,274	6,274
Balance at Mar. 31, 2021	2,610,015	$ 2,609,926	$ 782,328	$ 2,954,254	$ (35,009)	$ (23,679)	$ (1,867)	$ (1,066,101)	$ 89
Balance at Mar. 31, 2021	$ 2,609,926