CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Thousands	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Shares	Noncontrolling Interests	Total
Beginning Balance at Dec. 31, 2018	$ 9,858	$ 360,308	$ 2,564,440	$ (293,739)	$ (1,753,925)	$ 650	$ 887,592
Beginning Balance (in shares) at Dec. 31, 2018	63,546,000
Increase (Decrease) in Stockholders' Equity
Net income			293,109			(26)	293,083
Unrecognized amounts from defined benefit pension plans, net of tax				11,503			11,503
Unrealized gain (loss) on derivatives designated and qualifying as cash flow hedges, net of tax				(68)			(68)
Currency translation adjustment				6,454		281	6,735
Cash dividends declared			(117,950)				(117,950)
Stock-based compensation activity		26,116			4,855		30,971
Stock-based compensation activity (in shares)	467,000
Purchase of shares for treasury					(292,693)		(292,693)
Purchase of shares for treasury (in shares)	(3,421,000)
Other		3,022	(3,118)				(96)
Ending Balance at Dec. 31, 2019	$ 9,858	389,446	2,736,481	(275,850)	(2,041,763)	905	819,077
Ending Balance (in shares) at Dec. 31, 2019	60,592,000
Increase (Decrease) in Stockholders' Equity
Net income			206,115			29	206,144
Unrecognized amounts from defined benefit pension plans, net of tax				(31,224)			(31,224)
Unrealized gain (loss) on derivatives designated and qualifying as cash flow hedges, net of tax				861			861
Currency translation adjustment				4,023		45	4,068
Cash dividends declared			(118,423)				(118,423)
Stock-based compensation activity		27,076			5,504		32,580
Stock-based compensation activity (in shares)	457,000
Purchase of shares for treasury					(113,455)		(113,455)
Purchase of shares for treasury (in shares)	(1,408,000)
Other		(6,564)	(2,814)				(9,378)
Ending Balance at Dec. 31, 2020	$ 9,858	409,958	2,821,359	(302,190)	(2,149,714)	979	$ 790,250
Ending Balance (in shares) at Dec. 31, 2020	59,641,000						59,640,895
Increase (Decrease) in Stockholders' Equity
Net income			276,466			114	$ 276,580
Unrecognized amounts from defined benefit pension plans, net of tax				88,539			88,539
Unrealized gain (loss) on derivatives designated and qualifying as cash flow hedges, net of tax				5,607			5,607
Currency translation adjustment				(49,342)		(403)	(49,745)
Cash dividends declared			(124,669)				(124,669)
Stock-based compensation activity		38,720			4,299		43,019
Stock-based compensation activity (in shares)	393,000
Purchase of shares for treasury					(164,526)		$ (164,526)
Purchase of shares for treasury (in shares)	(1,247,000)						(1,200,000)
Other		2,590	(2,853)			(883)	$ (1,146)
Ending Balance at Dec. 31, 2021	$ 9,858	$ 451,268	$ 2,970,303	$ (257,386)	$ (2,309,941)	$ (193)	$ 863,909
Ending Balance (in shares) at Dec. 31, 2021	58,787,000						58,786,776