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Securities - Schedule of Estimated Fair Value and Unrealized Losses for Debt Securities Available-for-Sale and Held-to-Maturity (Details) - USD ($)
$ in Thousands
Sep. 30, 2025
Dec. 31, 2024
Debt securities available-for-sale:    
Available-for-sale, Less than 12 months, Estimated Fair Value $ 537,618 $ 242,563
Available-for-sale, Less than 12 months, Unrealized Losses (4,670) (877)
Available-for-sale, 12 months or Longer, Estimated Fair Value 219,387 208,677
Available-for-sale, 12 months or longer, Unrealized Losses (13,361) (20,440)
Available-for-sale, Total, Estimated Fair Value 757,005 451,240
Available-for-sale, Total, Unrealized Losses (18,031) (21,317)
Debt securities held-to-maturity:    
Held-to-maturity, Less than 12 months, Estimated Fair Value 6,893 126,796
Held-to-maturity, Less than 12 months, Unrealized Losses (759) (2,062)
Held-to-maturity, 12 months or longer, Estimated Fair Value 706,144 763,982
Held-to-maturity, 12 months or longer, Unrealized Losses (65,282) (92,882)
Held-to-maturity, Total, Estimated Fair Value 713,037 890,778
Held-to-maturity, Total, Unrealized Losses (66,041) (94,944)
Total securities, Less than 12 months, Estimated Fair Value 544,511 369,359
Total securities, Less than 12 months, Unrealized Losses (5,429) (2,939)
Total securities, 12 months or longer, Estimated Fair Value 925,531 972,659
Total securities, 12 months or longer, Unrealized Losses (78,643) (113,322)
Total securities, Estimated Fair Value 1,470,042 1,342,018
Total securities, Unrealized Losses (84,072) (116,261)
Portfolio layer fair value hedge basis adjustments (341)  
U.S. government and agency obligations | Investment securities    
Debt securities available-for-sale:    
Available-for-sale, Less than 12 months, Estimated Fair Value 0 3,221
Available-for-sale, Less than 12 months, Unrealized Losses 0 0
Available-for-sale, 12 months or Longer, Estimated Fair Value 52,101 49,538
Available-for-sale, 12 months or longer, Unrealized Losses (3,092) (5,022)
Available-for-sale, Total, Estimated Fair Value 52,101 52,759
Available-for-sale, Total, Unrealized Losses (3,092) (5,022)
Corporate debt securities    
Debt securities held-to-maturity:    
Held-to-maturity, Total, Unrealized Losses (1,271) (1,416)
Corporate debt securities | Investment securities    
Debt securities available-for-sale:    
Available-for-sale, Less than 12 months, Estimated Fair Value 2,499 4,793
Available-for-sale, Less than 12 months, Unrealized Losses (1) (55)
Available-for-sale, 12 months or Longer, Estimated Fair Value 4,731 6,029
Available-for-sale, 12 months or longer, Unrealized Losses (268) (707)
Available-for-sale, Total, Estimated Fair Value 7,230 10,822
Available-for-sale, Total, Unrealized Losses (269) (762)
Debt securities held-to-maturity:    
Held-to-maturity, Less than 12 months, Estimated Fair Value 2,864 1,247
Held-to-maturity, Less than 12 months, Unrealized Losses (754) (219)
Held-to-maturity, 12 months or longer, Estimated Fair Value 18,867 25,518
Held-to-maturity, 12 months or longer, Unrealized Losses (517) (1,197)
Held-to-maturity, Total, Estimated Fair Value 21,731 26,765
Held-to-maturity, Total, Unrealized Losses (1,271) (1,416)
Asset-backed securities | Investment securities    
Debt securities available-for-sale:    
Available-for-sale, Less than 12 months, Estimated Fair Value 26,067 31,588
Available-for-sale, Less than 12 months, Unrealized Losses (27) (21)
Available-for-sale, 12 months or Longer, Estimated Fair Value 0 59,148
Available-for-sale, 12 months or longer, Unrealized Losses 0 (63)
Available-for-sale, Total, Estimated Fair Value 26,067 90,736
Available-for-sale, Total, Unrealized Losses (27) (84)
Mortgage-backed securities:    
Debt securities available-for-sale:    
Available-for-sale, Less than 12 months, Estimated Fair Value 509,052 202,961
Available-for-sale, Less than 12 months, Unrealized Losses (4,642) (801)
Available-for-sale, 12 months or Longer, Estimated Fair Value 162,555 93,962
Available-for-sale, 12 months or longer, Unrealized Losses (10,001) (14,648)
Available-for-sale, Total, Estimated Fair Value 671,607 296,923
Available-for-sale, Total, Unrealized Losses (14,643) (15,449)
Debt securities held-to-maturity:    
Held-to-maturity, Less than 12 months, Estimated Fair Value 2,543 118,451
Held-to-maturity, Less than 12 months, Unrealized Losses 0 (1,667)
Held-to-maturity, 12 months or longer, Estimated Fair Value 543,087 569,030
Held-to-maturity, 12 months or longer, Unrealized Losses (54,550) (78,196)
Held-to-maturity, Total, Estimated Fair Value 545,630 687,481
Held-to-maturity, Total, Unrealized Losses (54,550) (79,863)
Mortgage-backed securities: | Agency residential    
Debt securities available-for-sale:    
Available-for-sale, Less than 12 months, Estimated Fair Value 508,559 202,961
Available-for-sale, Less than 12 months, Unrealized Losses (4,641) (801)
Available-for-sale, 12 months or Longer, Estimated Fair Value 64,646 0
Available-for-sale, 12 months or longer, Unrealized Losses (71) 0
Available-for-sale, Total, Estimated Fair Value 573,205 202,961
Available-for-sale, Total, Unrealized Losses (4,712) (801)
Debt securities held-to-maturity:    
Held-to-maturity, Less than 12 months, Estimated Fair Value 2,365 114,557
Held-to-maturity, Less than 12 months, Unrealized Losses 0 (1,647)
Held-to-maturity, 12 months or longer, Estimated Fair Value 463,352 479,847
Held-to-maturity, 12 months or longer, Unrealized Losses (48,937) (71,463)
Held-to-maturity, Total, Estimated Fair Value 465,717 594,404
Held-to-maturity, Total, Unrealized Losses (48,937) (73,110)
Mortgage-backed securities: | Agency commercial    
Debt securities available-for-sale:    
Available-for-sale, Less than 12 months, Estimated Fair Value 493 0
Available-for-sale, Less than 12 months, Unrealized Losses (1) 0
Available-for-sale, 12 months or Longer, Estimated Fair Value 97,909 93,962
Available-for-sale, 12 months or longer, Unrealized Losses (9,930) (14,648)
Available-for-sale, Total, Estimated Fair Value 98,402 93,962
Available-for-sale, Total, Unrealized Losses (9,931) (14,648)
Debt securities held-to-maturity:    
Held-to-maturity, Less than 12 months, Estimated Fair Value 178 3,894
Held-to-maturity, Less than 12 months, Unrealized Losses 0 (20)
Held-to-maturity, 12 months or longer, Estimated Fair Value 71,950 69,912
Held-to-maturity, 12 months or longer, Unrealized Losses (5,383) (5,858)
Held-to-maturity, Total, Estimated Fair Value 72,128 73,806
Held-to-maturity, Total, Unrealized Losses (5,383) (5,878)
Mortgage-backed securities: | Non-agency commercial    
Debt securities held-to-maturity:    
Held-to-maturity, Less than 12 months, Estimated Fair Value 0 0
Held-to-maturity, Less than 12 months, Unrealized Losses 0 0
Held-to-maturity, 12 months or longer, Estimated Fair Value 7,785 19,271
Held-to-maturity, 12 months or longer, Unrealized Losses (230) (875)
Held-to-maturity, Total, Estimated Fair Value 7,785 19,271
Held-to-maturity, Total, Unrealized Losses (230) (875)
State and municipal debt obligations    
Debt securities held-to-maturity:    
Held-to-maturity, Total, Unrealized Losses (10,220) (13,665)
State and municipal debt obligations | Investment securities    
Debt securities held-to-maturity:    
Held-to-maturity, Less than 12 months, Estimated Fair Value 1,486 7,098
Held-to-maturity, Less than 12 months, Unrealized Losses (5) (176)
Held-to-maturity, 12 months or longer, Estimated Fair Value 144,190 169,434
Held-to-maturity, 12 months or longer, Unrealized Losses (10,215) (13,489)
Held-to-maturity, Total, Estimated Fair Value 145,676 176,532
Held-to-maturity, Total, Unrealized Losses $ (10,220) $ (13,665)