v3.25.2
INVESTMENTS - Age of Gross Unrealized Losses and Associated Fair Value by Investment Category (Details) - USD ($)
$ in Thousands
Jun. 30, 2025
Dec. 31, 2024
Investments, Unrealized Loss Position [Line Items]    
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months $ 474,947 $ 620,715
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss 5,440 11,525
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer 1,671,821 1,911,161
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss 283,922 320,809
Debt Securities, Available-for-Sale, Unrealized Loss Position 2,146,768 2,531,876
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax (289,362) (332,334)
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value 2,273 3,111
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss (9) (33)
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value 60,440 63,315
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (6,788) (7,980)
Debt Securities, Held-to-Maturity, Unrealized Loss Position, Fair Value 62,713 66,426
Debt Securities, Held-to-Maturity, Unrealized Loss Position, Accumulated Loss (6,797) (8,013)
U.S. Treasuries    
Investments, Unrealized Loss Position [Line Items]    
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months 0 0
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss 0 0
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer 94 90
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss 6 9
Debt Securities, Available-for-Sale, Unrealized Loss Position 94 90
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax (6) (9)
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value 0 0
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss 0 0
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value 0 0
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss 0 0
Debt Securities, Held-to-Maturity, Unrealized Loss Position, Fair Value 0 0
Debt Securities, Held-to-Maturity, Unrealized Loss Position, Accumulated Loss 0 0
Securities of U.S. government agencies and corporations    
Investments, Unrealized Loss Position [Line Items]    
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months 0 0
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss 0 0
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer 65,503 71,678
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss 7,384 11,546
Debt Securities, Available-for-Sale, Unrealized Loss Position 65,503 71,678
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax (7,384) (11,546)
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value 0 0
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss 0 0
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value 0 0
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss 0 0
Debt Securities, Held-to-Maturity, Unrealized Loss Position, Fair Value 0 0
Debt Securities, Held-to-Maturity, Unrealized Loss Position, Accumulated Loss 0 0
Residential Mortgage Backed Securities [Member]    
Investments, Unrealized Loss Position [Line Items]    
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months 274,048 417,516
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss 4,022 9,130
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer 476,547 503,321
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss 79,271 95,078
Debt Securities, Available-for-Sale, Unrealized Loss Position 750,595 920,837
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax (83,293) (104,208)
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value 0 0
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss 0 0
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value 0 0
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss 0 0
Debt Securities, Held-to-Maturity, Unrealized Loss Position, Fair Value 0 0
Debt Securities, Held-to-Maturity, Unrealized Loss Position, Accumulated Loss 0 0
Commercial Mortgage Backed Securities [Member]    
Investments, Unrealized Loss Position [Line Items]    
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months 14,186 26,516
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss 45 67
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer 217,355 286,589
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss 17,802 25,314
Debt Securities, Available-for-Sale, Unrealized Loss Position 231,541 313,105
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax (17,847) (25,381)
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value 0 0
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss 0 0
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value 25,430 25,990
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (3,915) (4,454)
Debt Securities, Held-to-Maturity, Unrealized Loss Position, Fair Value 25,430 25,990
Debt Securities, Held-to-Maturity, Unrealized Loss Position, Accumulated Loss (3,915) (4,454)
Collateralized Mortgage Backed Securities [Member]    
Investments, Unrealized Loss Position [Line Items]    
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months 42,687 120,670
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss 769 1,776
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer 280,115 296,813
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss 41,730 50,823
Debt Securities, Available-for-Sale, Unrealized Loss Position 322,802 417,483
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax (42,499) (52,599)
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value 0 0
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss 0 0
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value 6,017 6,219
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (580) (788)
Debt Securities, Held-to-Maturity, Unrealized Loss Position, Fair Value 6,017 6,219
Debt Securities, Held-to-Maturity, Unrealized Loss Position, Accumulated Loss (580) (788)
Obligations of state and other political subdivisions    
Investments, Unrealized Loss Position [Line Items]    
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months 10,699 19,636
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss 342 351
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer 452,505 478,083
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss 116,004 109,553
Debt Securities, Available-for-Sale, Unrealized Loss Position 463,204 497,719
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax (116,346) (109,904)
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value 2,273 3,111
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss (9) (33)
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value 2,284 2,288
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (252) (306)
Debt Securities, Held-to-Maturity, Unrealized Loss Position, Fair Value 4,557 5,399
Debt Securities, Held-to-Maturity, Unrealized Loss Position, Accumulated Loss (261) (339)
Asset-backed Securities [Member]    
Investments, Unrealized Loss Position [Line Items]    
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months 133,327 26,389
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss 262 189
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer 65,917 159,135
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss 13,747 22,190
Debt Securities, Available-for-Sale, Unrealized Loss Position 199,244 185,524
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax (14,009) (22,379)
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value 0 0
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss 0 0
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value 0 0
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss 0 0
Debt Securities, Held-to-Maturity, Unrealized Loss Position, Fair Value 0 0
Debt Securities, Held-to-Maturity, Unrealized Loss Position, Accumulated Loss 0 0
Other securities    
Investments, Unrealized Loss Position [Line Items]    
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months 0 9,988
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss 0 12
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer 113,785 115,452
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss 7,978 6,296
Debt Securities, Available-for-Sale, Unrealized Loss Position 113,785 125,440
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax (7,978) (6,308)
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value 0 0
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss 0 0
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value 26,709 28,818
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (2,041) (2,432)
Debt Securities, Held-to-Maturity, Unrealized Loss Position, Fair Value 26,709 28,818
Debt Securities, Held-to-Maturity, Unrealized Loss Position, Accumulated Loss $ (2,041) $ (2,432)