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CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (UNAUDITED) - USD ($)
$ in Thousands
Total
Common Stock
Paid In Capital
Retained Earnings
Treasury Stock
Accumulated Other Comprehensive Income (Loss)
Beginning balance, net of tax at Dec. 31, 2023 $ 773,288 $ 47,550 $ 788,840 $ 282,355 $ (231,995) $ (113,462)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income 21,511     21,511    
Other comprehensive income (loss) 2,603         2,603
Issuance of common stock for dividend reinvestment plan 306 13 293      
Stock compensation expense 756   756      
Net issuance of common stock under employee stock plans 350   75 (95) 370  
Cash dividends paid on common stock (10,892)     (10,892)    
Ending balance, net of tax at Mar. 31, 2024 787,922 47,563 789,964 292,879 (231,625) (110,859)
Beginning balance, net of tax at Dec. 31, 2023 773,288 47,550 788,840 282,355 (231,995) (113,462)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income 66,708          
Other comprehensive income (loss) (5,037)          
Ending balance, net of tax at Sep. 30, 2024 805,254 47,588 792,249 316,050 (232,134) (118,499)
Beginning balance, net of tax at Mar. 31, 2024 787,922 47,563 789,964 292,879 (231,625) (110,859)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income 24,673     24,673    
Other comprehensive income (loss) (95)         (95)
Issuance of common stock for dividend reinvestment plan 290 14 276      
Purchase of common stock (1,510)       (1,510)  
Stock compensation expense 761   761      
Net issuance of common stock under employee stock plans (166)   (442) (95) 371  
Cash dividends paid on common stock (10,905)     (10,905)    
Ending balance, net of tax at Jun. 30, 2024 800,970 47,577 790,559 306,552 (232,764) (110,954)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income 20,524     20,524    
Other comprehensive income (loss) (7,545)         (7,545)
Issuance of common stock for dividend reinvestment plan 290 11 279      
Stock compensation expense 987   987      
Net issuance of common stock under employee stock plans 933   424 (121) 630  
Cash dividends paid on common stock (10,905)     (10,905)    
Ending balance, net of tax at Sep. 30, 2024 805,254 47,588 792,249 316,050 (232,134) (118,499)
Beginning balance, net of tax at Dec. 31, 2024 811,942 47,598 793,586 326,793 (231,137) (124,898)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income 21,507     21,507    
Other comprehensive income (loss) (6,916)         (6,916)
Issuance of common stock for dividend reinvestment plan 264 11 253      
Stock compensation expense 914   914      
Net issuance of common stock under employee stock plans (148)   (368) (130) 350  
Cash dividends paid on common stock (10,940)     (10,940)    
Ending balance, net of tax at Mar. 31, 2025 816,623 47,609 794,385 337,230 (230,787) (131,814)
Beginning balance, net of tax at Dec. 31, 2024 811,942 47,598 793,586 326,793 (231,137) (124,898)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income 48,233          
Other comprehensive income (loss) 16,794          
Ending balance, net of tax at Sep. 30, 2025 834,850 47,629 795,346 342,023 (242,044) (108,104)
Beginning balance, net of tax at Mar. 31, 2025 816,623 47,609 794,385 337,230 (230,787) (131,814)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income 21,813     21,813    
Other comprehensive income (loss) (9,671)         (9,671)
Issuance of common stock for dividend reinvestment plan 250 11 239      
Purchase of common stock (11,904)       (11,904)  
Stock compensation expense 686   686      
Net issuance of common stock under employee stock plans 293   (985) (113) 1,391  
Cash dividends paid on common stock (10,890)     (10,890)    
Ending balance, net of tax at Jun. 30, 2025 807,200 47,620 794,325 348,040 (241,300) (141,485)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income 4,913     4,913    
Other comprehensive income (loss) 33,381         33,381
Issuance of common stock for dividend reinvestment plan 225 9 216      
Purchase of common stock (804)       (804)  
Stock compensation expense 790   790      
Net issuance of common stock under employee stock plans (34)   15 (109) 60  
Cash dividends paid on common stock (10,821)     (10,821)    
Ending balance, net of tax at Sep. 30, 2025 $ 834,850 $ 47,629 $ 795,346 $ 342,023 $ (242,044) $ (108,104)