v3.25.3
INVESTMENTS - Summary of Held-To-Maturity and Available-For-Sale Investment Securities (Details) - USD ($)
$ in Thousands
Sep. 30, 2025
Dec. 31, 2024
Investment Holdings [Line Items]    
Total $ 71,595 $ 76,960
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain 80 42
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss (5,764) (8,013)
Held-to-Maturity Market Value 65,911 68,989
Total 3,669,996 3,512,652
Available for Sale Securities Gross Unrealized Gain Accumulated In Investments 16,141 3,458
Available for Sale Securities Gross Unrealized Loss Accumulated In Investments (263,542) (332,334)
Investment securities available-for-sale 3,422,595 3,183,776
U.S. Treasuries    
Investment Holdings [Line Items]    
Total 0 0
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain 0 0
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss 0 0
Held-to-Maturity Market Value 0 0
Total 99 99
Available for Sale Securities Gross Unrealized Gain Accumulated In Investments 0 0
Available for Sale Securities Gross Unrealized Loss Accumulated In Investments (5) (9)
Investment securities available-for-sale 94 90
Securities of U.S. government agencies and corporations    
Investment Holdings [Line Items]    
Total 0 0
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain 0 0
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss 0 0
Held-to-Maturity Market Value 0 0
Total 73,204 83,224
Available for Sale Securities Gross Unrealized Gain Accumulated In Investments 0 0
Available for Sale Securities Gross Unrealized Loss Accumulated In Investments (6,771) (11,546)
Investment securities available-for-sale 66,433 71,678
Residential Mortgage Backed Securities [Member]    
Investment Holdings [Line Items]    
Total 0 0
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain 0 0
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss 0 0
Held-to-Maturity Market Value 0 0
Total 1,358,833 1,102,242
Available for Sale Securities Gross Unrealized Gain Accumulated In Investments 8,152 508
Available for Sale Securities Gross Unrealized Loss Accumulated In Investments (74,625) (104,208)
Investment securities available-for-sale 1,292,360 998,542
Commercial Mortgage Backed Securities [Member]    
Investment Holdings [Line Items]    
Total 28,176 30,444
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain 0 0
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss (3,669) (4,454)
Held-to-Maturity Market Value 24,507 25,990
Total 311,509 382,727
Available for Sale Securities Gross Unrealized Gain Accumulated In Investments 957 26
Available for Sale Securities Gross Unrealized Loss Accumulated In Investments (19,457) (25,381)
Investment securities available-for-sale 293,009 357,372
Collateralized Mortgage Backed Securities [Member]    
Investment Holdings [Line Items]    
Total 6,349 7,007
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain 0 0
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss (530) (788)
Held-to-Maturity Market Value 5,819 6,219
Total 605,089 620,315
Available for Sale Securities Gross Unrealized Gain Accumulated In Investments 3,917 1,449
Available for Sale Securities Gross Unrealized Loss Accumulated In Investments (38,729) (52,599)
Investment securities available-for-sale 570,277 569,165
Obligations of state and other political subdivisions    
Investment Holdings [Line Items]    
Total 8,320 8,259
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain 80 42
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss (188) (339)
Held-to-Maturity Market Value 8,212 7,962
Total 621,066 630,813
Available for Sale Securities Gross Unrealized Gain Accumulated In Investments 634 357
Available for Sale Securities Gross Unrealized Loss Accumulated In Investments (102,632) (109,904)
Investment securities available-for-sale 519,068 521,266
Asset-backed Securities [Member]    
Investment Holdings [Line Items]    
Total 0 0
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain 0 0
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss 0 0
Held-to-Maturity Market Value 0 0
Total 563,927 555,484
Available for Sale Securities Gross Unrealized Gain Accumulated In Investments 1,959 998
Available for Sale Securities Gross Unrealized Loss Accumulated In Investments (14,082) (22,379)
Investment securities available-for-sale 551,804 534,103
Other securities    
Investment Holdings [Line Items]    
Total 28,750 31,250
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain 0 0
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss (1,377) (2,432)
Held-to-Maturity Market Value 27,373 28,818
Total 136,269 137,748
Available for Sale Securities Gross Unrealized Gain Accumulated In Investments 522 120
Available for Sale Securities Gross Unrealized Loss Accumulated In Investments (7,241) (6,308)
Investment securities available-for-sale $ 129,550 $ 131,560