Reconciliations of Equity - Reconciliations of Total Equity (Detail) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2022	Mar. 31, 2021
Reconciliations of total equity
Beginning Balance		$ 1,074,193	$ 988,365
Issuance of common stock under stock option plan		114	381
Purchase of common stock		(9,935)	(989)
Stock-based and deferred compensation		2,017	8
Net income		44,809	40,611
Other comprehensive income		13,053	(17,569)
Cash dividends paid:
Common stock		(7,513)	(6,861)
Ending Balance		1,116,738	1,003,946
Common Stock [Member]
Reconciliations of total equity
Beginning Balance		26,761	26,658
Issuance of common stock under stock option plan		2	6
Stock-based and deferred compensation		51	62
Cash dividends paid:
Ending Balance		26,814	26,726
Additional Paid-in Capital [Member]
Reconciliations of total equity
Beginning Balance		220,820	206,716
Issuance of common stock under stock option plan		112	375
Stock-based and deferred compensation		3,568	2,380
Cash dividends paid:
Ending Balance		224,500	209,471
Common Treasury Stock [Member]
Reconciliations of total equity
Beginning Balance		(153,702)	(133,629)
Purchase of common stock		(9,935)	(989)
Stock-based and deferred compensation		(1,602)	(2,434)
Cash dividends paid:
Ending Balance		(165,239)	(137,052)
Accumulated Other Comprehensive Income (Loss) [Member]
Reconciliations of total equity
Beginning Balance		(153,236)	(136,881)
Other comprehensive income		13,053	(17,561)
Cash dividends paid:
Ending Balance		(140,183)	(154,442)
Retained Earnings [Member]
Reconciliations of total equity
Beginning Balance		1,133,550	1,023,829
Net income		44,809	40,611
Cash dividends paid:
Common stock		(7,513)	(6,861)
Ending Balance		$ 1,170,846	1,057,579
Noncontrolling Interest [Member]
Reconciliations of total equity
Beginning Balance	[1]		1,672
Other comprehensive income	[1]		(8)
Cash dividends paid:
Ending Balance	[1]		$ 1,664

[1] Reflects the noncontrolling interest in the Company’s China joint venture.