XML 66 R54.htm IDEA: XBRL DOCUMENT v3.25.3
Investment Securities - Bond Ratings (Details) - USD ($)
$ in Thousands
Sep. 30, 2025
Dec. 31, 2024
Schedule of Held-to-maturity Securities [Line Items]    
Amortized Cost $ 1,266,205 $ 1,277,209
Aaa/AAA    
Schedule of Held-to-maturity Securities [Line Items]    
Amortized Cost 277,142  
Aa/AA    
Schedule of Held-to-maturity Securities [Line Items]    
Amortized Cost 832,351  
A    
Schedule of Held-to-maturity Securities [Line Items]    
Amortized Cost 32,589  
Not rated    
Schedule of Held-to-maturity Securities [Line Items]    
Amortized Cost 5,461  
Agency Backed    
Schedule of Held-to-maturity Securities [Line Items]    
Amortized Cost 118,662  
State and political subdivisions    
Schedule of Held-to-maturity Securities [Line Items]    
Amortized Cost 1,103,773 1,109,480
State and political subdivisions | Aaa/AAA    
Schedule of Held-to-maturity Securities [Line Items]    
Amortized Cost 233,372  
State and political subdivisions | Aa/AA    
Schedule of Held-to-maturity Securities [Line Items]    
Amortized Cost 832,351  
State and political subdivisions | A    
Schedule of Held-to-maturity Securities [Line Items]    
Amortized Cost 32,589  
State and political subdivisions | Not rated    
Schedule of Held-to-maturity Securities [Line Items]    
Amortized Cost 5,461  
State and political subdivisions | Agency Backed    
Schedule of Held-to-maturity Securities [Line Items]    
Amortized Cost 0  
U.S. government-sponsored enterprises    
Schedule of Held-to-maturity Securities [Line Items]    
Amortized Cost 43,770 $ 43,560
U.S. government-sponsored enterprises | Aaa/AAA    
Schedule of Held-to-maturity Securities [Line Items]    
Amortized Cost 43,770  
U.S. government-sponsored enterprises | Aa/AA    
Schedule of Held-to-maturity Securities [Line Items]    
Amortized Cost 0  
U.S. government-sponsored enterprises | A    
Schedule of Held-to-maturity Securities [Line Items]    
Amortized Cost 0  
U.S. government-sponsored enterprises | Not rated    
Schedule of Held-to-maturity Securities [Line Items]    
Amortized Cost 0  
U.S. government-sponsored enterprises | Agency Backed    
Schedule of Held-to-maturity Securities [Line Items]    
Amortized Cost 0  
U.S. government-sponsored mortgage-backed securities    
Schedule of Held-to-maturity Securities [Line Items]    
Amortized Cost 118,662  
U.S. government-sponsored mortgage-backed securities | Aaa/AAA    
Schedule of Held-to-maturity Securities [Line Items]    
Amortized Cost 0  
U.S. government-sponsored mortgage-backed securities | Aa/AA    
Schedule of Held-to-maturity Securities [Line Items]    
Amortized Cost 0  
U.S. government-sponsored mortgage-backed securities | A    
Schedule of Held-to-maturity Securities [Line Items]    
Amortized Cost 0  
U.S. government-sponsored mortgage-backed securities | Not rated    
Schedule of Held-to-maturity Securities [Line Items]    
Amortized Cost 0  
U.S. government-sponsored mortgage-backed securities | Agency Backed    
Schedule of Held-to-maturity Securities [Line Items]    
Amortized Cost $ 118,662