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Consolidated Statement of Changes in Shareholders' Equity - USD ($)
$ in Thousands
Total
Common Stock [Member]
Surplus [Member]
Retained Earnings [Member]
Accumulated Other Comprehensive (Loss) Income [Member]
Treasury Stock [Member]
Beginning Balance at Dec. 31, 2022 $ 4,516,193 $ 355,029 $ 3,168,874 $ 1,575,426 $ (332,732) $ (250,404)
Beginning Balance, shares at Dec. 31, 2022   142,011,560        
Net income 366,313 $ 0 0 366,313 0 0
Other comprehensive income, net of tax 73,051 0 0 0 73,051 0
Total comprehensive income, net of tax 439,364          
Stock based compensation expense 12,463 0 12,463 0 0 0
Stock grant forfeiture 0 $ 0 320 0 0 (320)
Stock grant forfeiture, shares   0        
Purchase of treasury stock (1,382) $ 0 0 0 0 (1,382)
Cash dividends (196,120) 0 0 (196,120) 0 0
Net issuance of common stock under stock-based compensation plans 722 $ 615 107 0 0 0
Net issuance of common stock under stock-based compensation plans, shares   246,086        
Ending Balance at Dec. 31, 2023 4,771,240 $ 355,644 3,181,764 1,745,619 (259,681) (252,106)
Ending Balance, shares at Dec. 31, 2023   142,257,646        
Net income 372,996 $ 0 0 372,996 0 0
Other comprehensive income, net of tax 35,778 0 0 0 35,778 0
Total comprehensive income, net of tax 408,774          
Stock based compensation expense 12,130 0 12,130 0 0 0
Stock grant forfeiture 0 $ 0 345 0 0 (345)
Stock grant forfeiture, shares   0        
Purchase of treasury stock (1,040) $ 0 0 0 0 (1,040)
Cash dividends (200,889) 0 0 (200,889) 0 0
Net issuance of common stock under stock-based compensation plans 3,008 $ 1,093 1,915 0 0 0
Net issuance of common stock under stock-based compensation plans, shares   437,170        
Ending Balance at Dec. 31, 2024 4,993,223 $ 356,737 3,196,154 1,917,726 (223,903) (253,491)
Ending Balance, shares at Dec. 31, 2024   142,694,816        
Net income 464,603 $ 0 0 464,603 0 0
Other comprehensive income, net of tax 84,976 0 0 0 84,976 0
Total comprehensive income, net of tax 549,579          
Acquisition of Piedmont Bancorp, Inc. 280,946 $ 19,652 261,294 0 0 0
Acquisition of Piedmont Bancorp, Inc., shares   7,860,831        
Stock based compensation expense 13,089 $ 0 13,089 0 0 0
Stock grant forfeiture 0 $ 0 610 0 0 (610)
Stock grant forfeiture, shares   0        
Termination of management stock bonus plan 0 $ 0 338 0 0 (338)
Purchase of treasury stock (126,989) 0 0 0 0 (126,989)
Cash dividends (212,002) 0 0 (212,002) 0 0
Net issuance of common stock under stock-based compensation plans (1,863) $ 753 (2,616) 0 0 0
Net issuance of common stock under stock-based compensation plans, shares   301,352        
Ending Balance at Dec. 31, 2025 $ 5,495,983 $ 377,142 $ 3,468,869 $ 2,170,327 $ (138,927) $ (381,428)
Ending Balance, shares at Dec. 31, 2025   150,856,999