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, 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)						(800,000)
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