v3.26.1
Securities - Securities in Continuous Loss Position (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Schedule Of Available For Sale Securities [Line Items]    
Available for Sale, Estimated Fair Value, Less than 12 Months $ 79,741 $ 61,828
Available for Sale, Unrealized Losses, Less than 12 Months (620) (162)
Available for Sale, Estimated Fair Value, 12 Months or More 208,033 241,350
Available for Sale, Unrealized Losses, 12 Months or More (2,668) (2,821)
Available for Sale, Estimated Fair Value, Total 287,774 303,178
Available for Sale, Unrealized Losses, Total (3,288) (2,983)
Held to Maturity, Estimated Fair Value, Less than 12 Months 3,127,315 396,884
Held to Maturity, Unrealized Losses, Less than 12 Months (29,200) (854)
Held to Maturity, Estimated Fair Value, 12 Months or More 7,183,085 8,013,220
Held to Maturity, Unrealized Losses, 12 Months or More (866,804) (851,416)
Held to Maturity, Estimated Fair Value, Total 10,310,400 8,410,104
Held to Maturity, Unrealized Losses, Total (896,004) (852,270)
Corporate Debt Securities [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Held to Maturity, Estimated Fair Value, 12 Months or More 11,160 10,980
Held to Maturity, Unrealized Losses, 12 Months or More (840) (1,020)
Held to Maturity, Estimated Fair Value, Total 11,160 10,980
Held to Maturity, Unrealized Losses, Total (840) (1,020)
Collateralized Mortgage Obligations [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Available for Sale, Estimated Fair Value, Less than 12 Months 10,816 29,345
Available for Sale, Unrealized Losses, Less than 12 Months (89) (71)
Available for Sale, Estimated Fair Value, 12 Months or More 157,294 159,382
Available for Sale, Unrealized Losses, 12 Months or More (2,379) (2,179)
Available for Sale, Estimated Fair Value, Total 168,110 188,727
Available for Sale, Unrealized Losses, Total (2,468) (2,250)
Held to Maturity, Estimated Fair Value, Less than 12 Months 177,162 548
Held to Maturity, Unrealized Losses, Less than 12 Months (2,162) (8)
Held to Maturity, Estimated Fair Value, 12 Months or More 149,443 165,061
Held to Maturity, Unrealized Losses, 12 Months or More (13,819) (12,169)
Held to Maturity, Estimated Fair Value, Total 326,605 165,609
Held to Maturity, Unrealized Losses, Total (15,981) (12,177)
Mortgage-backed Securities [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Available for Sale, Estimated Fair Value, Less than 12 Months 68,925 32,483
Available for Sale, Unrealized Losses, Less than 12 Months (531) (91)
Available for Sale, Estimated Fair Value, 12 Months or More 50,739 81,968
Available for Sale, Unrealized Losses, 12 Months or More (289) (642)
Available for Sale, Estimated Fair Value, Total 119,664 114,451
Available for Sale, Unrealized Losses, Total (820) (733)
Held to Maturity, Estimated Fair Value, Less than 12 Months 2,902,295 390,495
Held to Maturity, Unrealized Losses, Less than 12 Months (26,526) (775)
Held to Maturity, Estimated Fair Value, 12 Months or More 6,999,577 7,813,697
Held to Maturity, Unrealized Losses, 12 Months or More (850,807) (836,881)
Held to Maturity, Estimated Fair Value, Total 9,901,872 8,204,192
Held to Maturity, Unrealized Losses, Total (877,333) (837,656)
U.S. Government agencies [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Held to Maturity, Estimated Fair Value, Less than 12 Months 4,092 4,733
Held to Maturity, Unrealized Losses, Less than 12 Months (8) (70)
Held to Maturity, Estimated Fair Value, 12 Months or More 0  
Held to Maturity, Unrealized Losses, 12 Months or More 0  
Held to Maturity, Estimated Fair Value, Total 4,092 4,733
Held to Maturity, Unrealized Losses, Total (8) (70)
States and Political Subdivisions [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Held to Maturity, Estimated Fair Value, Less than 12 Months 43,766 1,108
Held to Maturity, Unrealized Losses, Less than 12 Months (504) (1)
Held to Maturity, Estimated Fair Value, 12 Months or More 22,905 23,482
Held to Maturity, Unrealized Losses, 12 Months or More (1,338) (1,346)
Held to Maturity, Estimated Fair Value, Total 66,671 24,590
Held to Maturity, Unrealized Losses, Total $ (1,842) $ (1,347)