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Reconciliations of Equity - Reconciliations of Total Equity (Detail) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Reconciliations of total equity    
Beginning Balance $ 988,365 $ 892,496
Issuance of common stock under stock option plan 381 155
Purchase of common stock (989) (7,243)
Stock-based and deferred compensation 8 1,116
Net income 40,611 27,539
Other comprehensive income (loss) (17,569) (40,389)
Cash dividends paid:    
Common stock (6,861) (6,202)
Ending Balance 1,003,946 867,472
Common Stock [Member]    
Reconciliations of total equity    
Beginning Balance 26,658 26,493
Issuance of common stock under stock option plan 6 3
Stock-based and deferred compensation 62 45
Cash dividends paid:    
Ending Balance 26,726 26,541
Additional Paid-in Capital [Member]    
Reconciliations of total equity    
Beginning Balance 206,716 193,135
Issuance of common stock under stock option plan 375 152
Stock-based and deferred compensation 2,380 2,374
Cash dividends paid:    
Ending Balance 209,471 195,661
Common Treasury Stock [Member]    
Reconciliations of total equity    
Beginning Balance (133,629) (114,139)
Purchase of common stock (989) (7,243)
Stock-based and deferred compensation (2,434) (1,303)
Cash dividends paid:    
Ending Balance (137,052) (122,685)
Accumulated Other Comprehensive Income (Loss) [Member]    
Reconciliations of total equity    
Beginning Balance (136,881) (136,170)
Other comprehensive income (loss) (17,561) (40,376)
Cash dividends paid:    
Ending Balance (154,442) (176,546)
Retained Earnings [Member]    
Reconciliations of total equity    
Beginning Balance 1,023,829 922,464
Net income 40,611 27,545
Cash dividends paid:    
Common stock (6,861) (6,202)
Ending Balance 1,057,579 943,807
Noncontrolling Interest [Member]    
Reconciliations of total equity    
Beginning Balance [1] 1,672 713
Net income [1]   (6)
Other comprehensive income (loss) [1] (8) (13)
Cash dividends paid:    
Ending Balance [1] $ 1,664 $ 694
[1] Reflects the noncontrolling interest in the Company’s China joint venture.