v3.26.3
Investment Securities (Details 2)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2026
USD ($)
Sep. 30, 2025
USD ($)
Sep. 30, 2026
USD ($)
Sep. 30, 2025
USD ($)
Dec. 31, 2025
USD ($)
Schedule Of Available For Sale Debt Securities [Line Items]          
Amortized cost of Investment Securities available-for-sale $ 1,606,405   $ 1,606,405   $ 1,568,429
Gross Unrealized Gains 3   3   7,879
Gross Unrealized Losses (98,422)   (98,422)   (53,822)
Investment securities available-for-sale 1,507,986   1,507,986   1,522,486
Fair Value          
Less than 12 Months 1,080,979   1,080,979   235,253
12 months or Longer 426,435   426,435   617,931
Total fair value 1,507,414   1,507,414   853,184
Unrealized Losses          
Less than 12 Months (38,709)   (38,709)   (736)
12 months or Longer (59,713)   (59,713)   (53,086)
Total unrealized losses (98,422)   (98,422)   (53,822)
Proceeds from sales and gross realized gains and losses          
Proceeds from sales 68,057 $ 73,537 68,834 $ 99,246  
Gross realized gains 0 0 13 0  
Gross realized losses (3,818) $ (1,877) (3,818) $ (2,874)  
Investment securities pledged as collateral $ 320,210   $ 320,210   237,340
Number of available-for-sale debt securities 593   593    
Number of available-for-sale debt securities in an unrealized loss position 589   589    
U.S. Treasury and Federal agencies securities          
Schedule Of Available For Sale Debt Securities [Line Items]          
Amortized cost of Investment Securities available-for-sale $ 732,213   $ 732,213   697,652
Gross Unrealized Gains 0   0   3,171
Gross Unrealized Losses (19,334)   (19,334)   (4,046)
Investment securities available-for-sale 712,879   712,879   696,777
Fair Value          
Less than 12 Months 620,192   620,192   146,252
12 months or Longer 92,687   92,687   173,152
Total fair value 712,879   712,879   319,404
Unrealized Losses          
Less than 12 Months (18,113)   (18,113)   (300)
12 months or Longer (1,221)   (1,221)   (3,746)
Total unrealized losses (19,334)   (19,334)   (4,046)
U.S. States and political subdivisions securities          
Schedule Of Available For Sale Debt Securities [Line Items]          
Amortized cost of Investment Securities available-for-sale 105,758   105,758   113,126
Gross Unrealized Gains 0   0   1,333
Gross Unrealized Losses (5,511)   (5,511)   (1,396)
Investment securities available-for-sale 100,247   100,247   113,063
Fair Value          
Less than 12 Months 77,687   77,687   13,587
12 months or Longer 22,560   22,560   29,532
Total fair value 100,247   100,247   43,119
Unrealized Losses          
Less than 12 Months (4,088)   (4,088)   (81)
12 months or Longer (1,423)   (1,423)   (1,315)
Total unrealized losses (5,511)   (5,511)   (1,396)
Mortgage-backed securities - Federal agencies          
Schedule Of Available For Sale Debt Securities [Line Items]          
Amortized cost of Investment Securities available-for-sale 767,934   767,934   757,151
Gross Unrealized Gains 3   3   3,372
Gross Unrealized Losses (73,556)   (73,556)   (48,380)
Investment securities available-for-sale 694,381   694,381   712,143
Fair Value          
Less than 12 Months 382,621   382,621   75,414
12 months or Longer 311,188   311,188   415,247
Total fair value 693,809   693,809   490,661
Unrealized Losses          
Less than 12 Months (16,487)   (16,487)   (355)
12 months or Longer (57,069)   (57,069)   (48,025)
Total unrealized losses (73,556)   (73,556)   (48,380)
Corporate debt securities          
Schedule Of Available For Sale Debt Securities [Line Items]          
Amortized cost of Investment Securities available-for-sale 500   500   500
Gross Unrealized Gains 0   0   3
Gross Unrealized Losses (21)   (21)   0
Investment securities available-for-sale 479   479   $ 503
Fair Value          
Less than 12 Months 479   479    
12 months or Longer 0   0    
Total fair value 479   479    
Unrealized Losses          
Less than 12 Months (21)   (21)    
12 months or Longer 0   0    
Total unrealized losses $ (21)   $ (21)