v3.26.1
Investment Securities Gross Unrealized Losses and Fair Values of Investments by Category and Length of Time in a Continuous Unrealized Loss Position (Details)
$ in Thousands
Jun. 30, 2026
USD ($)
Security
Dec. 31, 2025
USD ($)
Security
Schedule of Investments [Line Items]    
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | Security 98 16
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months $ 996,202 $ 139,615
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss $ (8,788) $ (836)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | Security 535 576
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer $ 1,536,127 $ 1,730,263
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (239,281) (247,014)
Debt Securities, Available-for-sale, Unrealized Loss Position 2,532,329 1,869,878
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss $ (248,069) $ (247,850)
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | Security 9 0
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value $ 228,701 $ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss $ (4,020) $ 0
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | Security 178 180
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value $ 965,277 $ 1,008,554
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer (166,887) (163,285)
Debt Securities, Held-to-maturity, Unrealized Loss Position, Fair Value 1,193,978 1,008,554
Debt Securities, Held-to-maturity, Unrealized Loss Position, Accumulated Loss $ (170,907) $ (163,285)
State and Municipal Securities [Member]    
Schedule of Investments [Line Items]    
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | Security 28 3
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months $ 60,146 $ 10,532
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss $ (597) $ (127)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | Security 252 277
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer $ 729,402 $ 776,597
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (115,634) (125,270)
Debt Securities, Available-for-sale, Unrealized Loss Position 789,548 787,129
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss $ (116,231) $ (125,397)
Corporate Debt Securities [Member]    
Schedule of Investments [Line Items]    
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | Security 9 5
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months $ 47,846 $ 22,911
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss $ (301) $ (329)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | Security 16 21
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer $ 106,943 $ 145,563
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (3,790) (5,751)
Debt Securities, Available-for-sale, Unrealized Loss Position 154,789 168,474
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss $ (4,091) $ (6,080)
Collateralized Mortgage Obligations [Member]    
Schedule of Investments [Line Items]    
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | Security 25 1
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months $ 495,539 $ 19,806
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss $ (3,998) $ (128)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | Security 68 72
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer $ 67,346 $ 74,446
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (7,641) (7,100)
Debt Securities, Available-for-sale, Unrealized Loss Position 562,885 94,252
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss $ (11,639) $ (7,228)
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | Security 4  
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value $ 160,179  
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss $ (2,840)  
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | Security 0  
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value $ 0  
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer 0  
Debt Securities, Held-to-maturity, Unrealized Loss Position, Fair Value 160,179  
Debt Securities, Held-to-maturity, Unrealized Loss Position, Accumulated Loss $ (2,840)  
Residential Mortgage Backed Securities [Member]    
Schedule of Investments [Line Items]    
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | Security 25 3
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months $ 252,623 $ 34,766
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss $ (1,755) $ (97)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | Security 71 75
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer $ 184,811 $ 240,422
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (22,098) (21,043)
Debt Securities, Available-for-sale, Unrealized Loss Position 437,434 275,188
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss $ (23,853) $ (21,140)
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | Security 4 0
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value $ 34,560 $ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss $ (290) $ 0
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | Security 118 120
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value $ 240,575 $ 275,497
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer (44,431) (44,093)
Debt Securities, Held-to-maturity, Unrealized Loss Position, Fair Value 275,135 275,497
Debt Securities, Held-to-maturity, Unrealized Loss Position, Accumulated Loss $ (44,721) $ (44,093)
Commercial Mortgage Backed Securities [Member]    
Schedule of Investments [Line Items]    
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | Security 11 4
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months $ 140,048 $ 51,600
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss $ (2,137) $ (155)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | Security 128 131
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer $ 447,625 $ 493,235
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (90,118) (87,850)
Debt Securities, Available-for-sale, Unrealized Loss Position 587,673 544,835
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss $ (92,255) $ (88,005)
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | Security 1 0
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value $ 33,962 $ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss $ (890) $ 0
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | Security 60 60
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value $ 724,702 $ 733,057
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer (122,456) (119,192)
Debt Securities, Held-to-maturity, Unrealized Loss Position, Fair Value 758,664 733,057
Debt Securities, Held-to-maturity, Unrealized Loss Position, Accumulated Loss $ (123,346) $ (119,192)