CONDENSED 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
Beginning balance at Dec. 31, 2019	$ 1,572,252	$ (1,377)	$ 1,523,820	$ (1,377)	$ (341,948)	$ 686	$ (381,238)	$ 770,596	$ 336
Increase (Decrease) in Stockholders' Equity
Net income (loss)	55,250		55,253						(3)
Foreign currency translation adjustments	(42,229)				(42,229)
Changes in unrecognized pension gains (losses) and related amortization, net of tax	1,636				1,636
Changes in derivative gains (losses), net of tax	1,483				1,483
Stock awards and option exercises	23,639					3	8,665	14,971
Cash dividends declared on common stock	(23,031)		(23,031)
Ending balance at Mar. 31, 2020	$ 1,587,623		1,554,665		(381,058)	689	(372,573)	785,567	333
Increase (Decrease) in Stockholders' Equity
Accounting Standards Update [Extensible List]	Accounting Standards Update 2016-13
Beginning balance at Dec. 31, 2020	$ 1,850,785		1,643,825		(281,709)	695	(361,583)	849,161	396
Increase (Decrease) in Stockholders' Equity
Net income (loss)	83,939		83,952						(13)
Foreign currency translation adjustments	(48,482)				(48,482)
Changes in unrecognized pension gains (losses) and related amortization, net of tax	2,706				2,706
Changes in derivative gains (losses), net of tax	520				520
Stock awards and option exercises	34,768					5	9,301	25,462
Cash dividends declared on common stock	(23,441)		(23,441)
Ending balance at Mar. 31, 2021	$ 1,900,795		$ 1,704,336		$ (326,965)	$ 700	$ (352,282)	$ 874,623	$ 383