CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Thousands	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Shares	Noncontrolling Interests	Total
Beginning Balance at Dec. 31, 2020	$ 9,858	$ 409,958	$ 2,821,359	$ (302,190)	$ (2,149,714)	$ 979	$ 790,250
Beginning Balance (in shares) at Dec. 31, 2020	59,641,000
Increase (Decrease) in Stockholders' Equity
Net income			74,177			(44)	74,133
Unrecognized amounts from defined benefit pension plans, net of tax				5,060			5,060
Unrealized gain (loss) on derivatives designated and qualifying as cash flow hedges, net of tax				7,290			7,290
Currency translation adjustment				(22,584)		(159)	(22,743)
Cash dividends declared			(30,572)				(30,572)
Stock-based compensation activity		7,680			1,502		9,182
Stock-based compensation activity (in shares)	134,000
Purchase of shares for treasury					(28,459)		(28,459)
Purchase of shares for treasury (in shares)	(237,000)
Other		891	(741)			(883)	(733)
Ending Balance at Mar. 31, 2021	$ 9,858	418,529	2,864,223	(312,424)	(2,176,671)	(107)	803,408
Ending Balance (in shares) at Mar. 31, 2021	59,538,000
Beginning Balance at Dec. 31, 2020	$ 9,858	409,958	2,821,359	(302,190)	(2,149,714)	979	790,250
Beginning Balance (in shares) at Dec. 31, 2020	59,641,000
Increase (Decrease) in Stockholders' Equity
Net income							202,170
Unrecognized amounts from defined benefit pension plans, net of tax							58,916
Unrealized gain (loss) on derivatives designated and qualifying as cash flow hedges, net of tax							5,412
Currency translation adjustment							(28,284)
Ending Balance at Sep. 30, 2021	$ 9,858	434,786	2,930,361	(265,819)	(2,251,193)	(100)	857,893
Ending Balance (in shares) at Sep. 30, 2021	59,048,000
Beginning Balance at Mar. 31, 2021	$ 9,858	418,529	2,864,223	(312,424)	(2,176,671)	(107)	803,408
Beginning Balance (in shares) at Mar. 31, 2021	59,538,000
Increase (Decrease) in Stockholders' Equity
Net income			96,105			175	96,280
Unrecognized amounts from defined benefit pension plans, net of tax				(1,702)			(1,702)
Unrealized gain (loss) on derivatives designated and qualifying as cash flow hedges, net of tax				(4,754)			(4,754)
Currency translation adjustment				13,689		(110)	13,579
Cash dividends declared			(30,552)				(30,552)
Stock-based compensation activity		8,638			503		9,141
Stock-based compensation activity (in shares)	46,000
Purchase of shares for treasury					(25,229)		(25,229)
Purchase of shares for treasury (in shares)	(197,000)
Other		409	(957)				(548)
Ending Balance at Jun. 30, 2021	$ 9,858	427,576	2,928,819	(305,191)	(2,201,397)	(42)	859,623
Ending Balance (in shares) at Jun. 30, 2021	59,387,000
Increase (Decrease) in Stockholders' Equity
Net income			31,757				31,757
Unrecognized amounts from defined benefit pension plans, net of tax				55,558			55,558
Unrealized gain (loss) on derivatives designated and qualifying as cash flow hedges, net of tax				2,876			2,876
Currency translation adjustment				(19,062)		(58)	(19,120)
Cash dividends declared			(30,379)				(30,379)
Stock-based compensation activity		7,449			364		7,813
Stock-based compensation activity (in shares)	34,000
Purchase of shares for treasury					(50,160)		(50,160)
Purchase of shares for treasury (in shares)	(373,000)
Other		(239)	164				(75)
Ending Balance at Sep. 30, 2021	$ 9,858	434,786	2,930,361	(265,819)	(2,251,193)	(100)	857,893
Ending Balance (in shares) at Sep. 30, 2021	59,048,000
Beginning Balance at Dec. 31, 2021	$ 9,858	451,268	2,970,303	(257,386)	(2,309,941)	(193)	863,909
Beginning Balance (in shares) at Dec. 31, 2021	58,787,000
Increase (Decrease) in Stockholders' Equity
Net income			126,030			1	126,031
Unrecognized amounts from defined benefit pension plans, net of tax				107			107
Unrealized gain (loss) on derivatives designated and qualifying as cash flow hedges, net of tax				5,355			5,355
Currency translation adjustment				(7,583)		134	(7,449)
Cash dividends declared			(32,505)				(32,505)
Stock-based compensation activity		10,834			1,349		12,183
Stock-based compensation activity (in shares)	116,000
Purchase of shares for treasury					(104,579)		(104,579)
Purchase of shares for treasury (in shares)	(805,000)
Other		115	(107)				8
Ending Balance at Mar. 31, 2022	$ 9,858	462,217	3,063,721	(259,507)	(2,413,171)	(58)	863,060
Ending Balance (in shares) at Mar. 31, 2022	58,098,000
Beginning Balance at Dec. 31, 2021	$ 9,858	451,268	2,970,303	(257,386)	(2,309,941)	(193)	863,909
Beginning Balance (in shares) at Dec. 31, 2021	58,787,000
Increase (Decrease) in Stockholders' Equity
Net income							363,078
Unrecognized amounts from defined benefit pension plans, net of tax							148
Unrealized gain (loss) on derivatives designated and qualifying as cash flow hedges, net of tax							22,082
Currency translation adjustment							$ (94,193)
Purchase of shares for treasury (in shares)							(1,200,000)
Ending Balance at Sep. 30, 2022	$ 9,858	471,172	3,237,200	(329,451)	(2,464,460)	(91)	$ 924,228
Ending Balance (in shares) at Sep. 30, 2022	57,738,000
Beginning Balance at Mar. 31, 2022	$ 9,858	462,217	3,063,721	(259,507)	(2,413,171)	(58)	863,060
Beginning Balance (in shares) at Mar. 31, 2022	58,098,000
Increase (Decrease) in Stockholders' Equity
Net income			127,823			(1)	127,822
Unrecognized amounts from defined benefit pension plans, net of tax				(44)			(44)
Unrealized gain (loss) on derivatives designated and qualifying as cash flow hedges, net of tax				8,950			8,950
Currency translation adjustment				(34,596)		(19)	(34,615)
Cash dividends declared			(32,698)				(32,698)
Stock-based compensation activity		5,428			146		5,574
Stock-based compensation activity (in shares)	15,000
Purchase of shares for treasury					(25,119)		(25,119)
Purchase of shares for treasury (in shares)	(191,000)
Other		(2,021)	2,074				53
Ending Balance at Jun. 30, 2022	$ 9,858	465,624	3,160,920	(285,197)	(2,438,144)	(78)	912,983
Ending Balance (in shares) at Jun. 30, 2022	57,922,000
Increase (Decrease) in Stockholders' Equity
Net income			109,225				109,225
Unrecognized amounts from defined benefit pension plans, net of tax				85			85
Unrealized gain (loss) on derivatives designated and qualifying as cash flow hedges, net of tax				7,777			7,777
Currency translation adjustment				(52,116)		(13)	(52,129)
Cash dividends declared			(32,580)				(32,580)
Stock-based compensation activity		5,158			202		5,360
Stock-based compensation activity (in shares)	14,000
Purchase of shares for treasury					(26,518)		$ (26,518)
Purchase of shares for treasury (in shares)	(198,000)						(200,000)
Other		390	(365)				$ 25
Ending Balance at Sep. 30, 2022	$ 9,858	$ 471,172	$ 3,237,200	$ (329,451)	$ (2,464,460)	$ (91)	$ 924,228
Ending Balance (in shares) at Sep. 30, 2022	57,738,000