Consolidated Statements of Equity - USD ($) $ in Thousands		Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Common Treasury Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Retained Earnings [Member]	Noncontrolling Interests [Member]
Beginning Balance at Dec. 31, 2018		$ 808,185	$ 26,309	$ 182,881	$ (97,389)	$ (141,483)	$ 837,107	$ 760
Issuance of common stock under stock option plan		3,037	60	2,977
Purchase of common stock		(13,184)			(13,184)
Stock-based and deferred compensation		3,835	124	7,277	(3,566)
Net income		103,101					103,129	(28)
Other comprehensive income		10,619				10,638		(19)
Cash dividends paid:
Common stock		(23,097)					(23,097)
Other	[1]					(5,325)	5,325
Ending Balance at Dec. 31, 2019		892,496	26,493	193,135	(114,139)	(136,170)	922,464	713
Issuance of common stock under stock option plan		2,926	48	2,878
Purchase of common stock		(15,253)			(15,253)
Stock-based and deferred compensation		6,583	117	10,703	(4,237)
Net income		127,656					126,770	886
Other comprehensive income		(638)				(711)		73
Cash dividends paid:
Common stock		(25,405)					(25,405)
Ending Balance at Dec. 31, 2020		988,365	26,658	206,716	(133,629)	(136,881)	1,023,829	1,672
Issuance of common stock under stock option plan		1,369	20	1,349
Purchase of common stock		(16,969)			(16,969)
Stock-based and deferred compensation		9,734	83	12,755	(3,104)
Net income		137,895					137,804	91
Other comprehensive income		(16,324)				(16,355)		31
Cash dividends paid:
Common stock		(28,083)					(28,083)
Other	[2]	(1,794)						$ (1,794)
Ending Balance at Dec. 31, 2021		$ 1,074,193	$ 26,761	$ 220,820	$ (153,702)	$ (153,236)	$ 1,133,550

[1] Reflects beginning retained earnings adjustment as a result of the Company’s first quarter 2019 adoption of ASU No. 2018-02, Income Statement-Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income.

[2] Reflects the derecognition of noncontrolling interest due to the dissolution of the China joint venture. See Note 1, Summary of Significant Accounting Policies, of the notes to the Company’s consolidated financial statements (included in Item 8 of this Form 10-K).