XML 60 R48.htm IDEA: XBRL DOCUMENT v3.24.3
Investment Securities - Amortized Cost and Fair Value of Securities Held-to-Maturity (Details) - USD ($)
$ in Thousands
Sep. 30, 2024
Dec. 31, 2023
Sep. 30, 2023
Dec. 31, 2022
Schedule of Held-to-maturity Securities [Line Items]        
Amortized Cost $ 1,279,095 $ 1,283,987    
Allowance for Credit Losses (2,005) (2,005) $ (2,005) $ (2,005)
Net Carrying Amount 1,277,090 1,281,982    
Gross Unrealized Gains 951 562    
Gross Unrealized (Losses) (83,586) (112,063)    
Estimated Fair Value 1,194,455 1,170,481    
U.S. government-sponsored enterprises        
Schedule of Held-to-maturity Securities [Line Items]        
Amortized Cost 43,490 43,285    
Allowance for Credit Losses 0 0    
Net Carrying Amount 43,490 43,285    
Gross Unrealized Gains 0 0    
Gross Unrealized (Losses) (1,712) (2,607)    
Estimated Fair Value 41,778 40,678    
U.S. government-sponsored mortgage-backed securities        
Schedule of Held-to-maturity Securities [Line Items]        
Amortized Cost 125,920 130,278    
Allowance for Credit Losses 0 0    
Net Carrying Amount 125,920 130,278    
Gross Unrealized Gains 754 106    
Gross Unrealized (Losses) (2,288) (4,362)    
Estimated Fair Value 124,386 126,022    
State and political subdivisions        
Schedule of Held-to-maturity Securities [Line Items]        
Amortized Cost 1,109,685 1,110,424    
Allowance for Credit Losses (2,005) (2,005)    
Net Carrying Amount 1,107,680 1,108,419    
Gross Unrealized Gains 197 456    
Gross Unrealized (Losses) (79,586) (105,094)    
Estimated Fair Value $ 1,028,291 $ 1,003,781