XML 150 R135.htm IDEA: XBRL DOCUMENT v3.24.0.1
Capital - Additional Information (Detail) - USD ($)
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Oct. 31, 2021
Dec. 31, 2020
Subsequent Event [Line Items]          
Shareholders' equity $ 1,314,274,000 $ 1,052,074,000 $ 1,109,372,000   $ 1,068,617,000
Increase (decrease) in equity 262,200,000        
Net Income 157,063,000 128,181,000 138,257,000    
Payments of dividends 50,814,000 44,578,000 43,611,000    
Purchase of treasury stock $ 14,965,000 $ 15,598,000 $ 31,301,000    
Cash Dividends Declared per Common Share (in dollars per share) $ 0.495 $ 0.475 $ 0.455    
Borrowings $ 0        
Treasury stock reissued 2,211,000 $ 2,192,000 $ 2,264,000    
Dividends, Common Stock, Cash (50,814,000) (44,578,000) (43,611,000)    
Treasury Stock, Value, Acquired, Cost Method (15,083,000) (15,598,000) (31,301,000)    
Total other comprehensive (loss) Income 25,936,000 (128,924,000) (26,001,000)    
Parent Company [Member]          
Subsequent Event [Line Items]          
Shareholders' equity 1,314,274,000 1,052,074,000      
Net Income 157,063,000 128,181,000 138,257,000    
Payments of dividends 50,814,000 44,578,000 43,611,000    
Purchase of treasury stock 14,965,000 15,598,000 31,301,000    
Payments to Acquire Businesses and Interest in Affiliates $ (18,000) $ 0 $ 0    
2021 Share Repurchase Plan 2          
Subsequent Event [Line Items]          
Announcement of common stock repurchase program       $ 25,000,000  
Stock repurchased (in shares) 2,491,577        
Average price per share $ 13.08