v3.26.1
Securities - Schedule of Estimated Fair Value and Unrealized Losses for Debt Securities AFS and HTM (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Debt securities AFS:    
Available-for-sale, Less than 12 months, Estimated Fair Value $ 1,022,622 $ 571,564
Available-for-sale, Less than 12 months, Unrealized Losses (12,632) (4,029)
Available-for-sale, 12 months or Longer, Estimated Fair Value 150,691 175,804
Available-for-sale, 12 months or longer, Unrealized Losses (11,998) (11,987)
Available-for-sale, Total, Estimated Fair Value 1,173,313 747,368
Available-for-sale, Total, Unrealized Losses (24,630) (16,016)
Debt securities HTM:    
Held-to-maturity, Less than 12 months, Estimated Fair Value 1,129,468 28,710
Held-to-maturity, Less than 12 months, Unrealized Losses (3,731) (314)
Held-to-maturity, 12 months or longer, Estimated Fair Value 556,959 651,165
Held-to-maturity, 12 months or longer, Unrealized Losses (59,920) (58,756)
Held-to-maturity, Total, Estimated Fair Value 1,686,427 679,875
Held-to-maturity, Total, Unrealized Losses (63,651) (59,070)
Total securities, Less than 12 months, Estimated Fair Value 2,152,090 600,274
Total securities, Less than 12 months, Unrealized Losses (16,363) (4,343)
Total securities, 12 months or longer, Estimated Fair Value 707,650 826,969
Total securities, 12 months or longer, Unrealized Losses (71,918) (70,743)
Total securities, Estimated Fair Value 2,859,740 1,427,243
Total securities, Unrealized Losses (88,281) (75,086)
Portfolio layer fair value hedge basis adjustments 12,223 4,038
U.S. government and agency obligations | Investment securities    
Debt securities AFS:    
Available-for-sale, Less than 12 months, Estimated Fair Value 0 0
Available-for-sale, Less than 12 months, Unrealized Losses 0 0
Available-for-sale, 12 months or Longer, Estimated Fair Value 52,087 51,941
Available-for-sale, 12 months or longer, Unrealized Losses (2,544) (2,666)
Available-for-sale, Total, Estimated Fair Value 52,087 51,941
Available-for-sale, Total, Unrealized Losses (2,544) (2,666)
State and municipal debt obligations    
Debt securities HTM:    
Held-to-maturity, Total, Unrealized Losses (7,155) (8,518)
State and municipal debt obligations | Investment securities    
Debt securities HTM:    
Held-to-maturity, Less than 12 months, Estimated Fair Value 4,911 245
Held-to-maturity, Less than 12 months, Unrealized Losses (59) 0
Held-to-maturity, 12 months or longer, Estimated Fair Value 125,489 138,624
Held-to-maturity, 12 months or longer, Unrealized Losses (7,096) (8,518)
Held-to-maturity, Total, Estimated Fair Value 130,400 138,869
Held-to-maturity, Total, Unrealized Losses (7,155) (8,518)
Corporate debt securities    
Debt securities HTM:    
Held-to-maturity, Total, Unrealized Losses (398) (692)
Corporate debt securities | Investment securities    
Debt securities AFS:    
Available-for-sale, Less than 12 months, Estimated Fair Value 48,005 4,712
Available-for-sale, Less than 12 months, Unrealized Losses (150) (97)
Available-for-sale, 12 months or Longer, Estimated Fair Value 993 3,798
Available-for-sale, 12 months or longer, Unrealized Losses (8) (201)
Available-for-sale, Total, Estimated Fair Value 48,998 8,510
Available-for-sale, Total, Unrealized Losses (158) (298)
Debt securities HTM:    
Held-to-maturity, Less than 12 months, Estimated Fair Value 992 4,458
Held-to-maturity, Less than 12 months, Unrealized Losses (1) (241)
Held-to-maturity, 12 months or longer, Estimated Fair Value 15,768 14,295
Held-to-maturity, 12 months or longer, Unrealized Losses (397) (451)
Held-to-maturity, Total, Estimated Fair Value 16,760 18,753
Held-to-maturity, Total, Unrealized Losses (398) (692)
Asset-backed securities | Investment securities    
Debt securities AFS:    
Available-for-sale, Less than 12 months, Estimated Fair Value 243,820 68,805
Available-for-sale, Less than 12 months, Unrealized Losses (157) (161)
Available-for-sale, 12 months or Longer, Estimated Fair Value 0 0
Available-for-sale, 12 months or longer, Unrealized Losses 0 0
Available-for-sale, Total, Estimated Fair Value 243,820 68,805
Available-for-sale, Total, Unrealized Losses (157) (161)
Mortgage-backed securities:    
Debt securities AFS:    
Available-for-sale, Less than 12 months, Estimated Fair Value 730,797 498,047
Available-for-sale, Less than 12 months, Unrealized Losses (12,325) (3,771)
Available-for-sale, 12 months or Longer, Estimated Fair Value 97,611 120,065
Available-for-sale, 12 months or longer, Unrealized Losses (9,446) (9,120)
Available-for-sale, Total, Estimated Fair Value 828,408 618,112
Available-for-sale, Total, Unrealized Losses (21,771) (12,891)
Debt securities HTM:    
Held-to-maturity, Less than 12 months, Estimated Fair Value 1,123,565 24,007
Held-to-maturity, Less than 12 months, Unrealized Losses (3,671) (73)
Held-to-maturity, 12 months or longer, Estimated Fair Value 415,702 498,246
Held-to-maturity, 12 months or longer, Unrealized Losses (52,427) (49,787)
Held-to-maturity, Total, Estimated Fair Value 1,539,267 522,253
Held-to-maturity, Total, Unrealized Losses (56,098) (49,860)
Mortgage-backed securities: | Agency residential    
Debt securities AFS:    
Available-for-sale, Less than 12 months, Estimated Fair Value 730,312 498,047
Available-for-sale, Less than 12 months, Unrealized Losses (12,322) (3,771)
Available-for-sale, 12 months or Longer, Estimated Fair Value 0 21,547
Available-for-sale, 12 months or longer, Unrealized Losses 0 (59)
Available-for-sale, Total, Estimated Fair Value 730,312 519,594
Available-for-sale, Total, Unrealized Losses (12,322) (3,830)
Debt securities HTM:    
Held-to-maturity, Less than 12 months, Estimated Fair Value 1,089,549 23,548
Held-to-maturity, Less than 12 months, Unrealized Losses (3,555) (72)
Held-to-maturity, 12 months or longer, Estimated Fair Value 348,410 425,748
Held-to-maturity, 12 months or longer, Unrealized Losses (46,233) (44,449)
Held-to-maturity, Total, Estimated Fair Value 1,437,959 449,296
Held-to-maturity, Total, Unrealized Losses (49,788) (44,521)
Mortgage-backed securities: | Agency commercial    
Debt securities AFS:    
Available-for-sale, Less than 12 months, Estimated Fair Value 485 0
Available-for-sale, Less than 12 months, Unrealized Losses (3) 0
Available-for-sale, 12 months or Longer, Estimated Fair Value 97,611 98,518
Available-for-sale, 12 months or longer, Unrealized Losses (9,446) (9,061)
Available-for-sale, Total, Estimated Fair Value 98,096 98,518
Available-for-sale, Total, Unrealized Losses (9,449) (9,061)
Debt securities HTM:    
Held-to-maturity, Less than 12 months, Estimated Fair Value 34,016 0
Held-to-maturity, Less than 12 months, Unrealized Losses (116) 0
Held-to-maturity, 12 months or longer, Estimated Fair Value 66,317 71,509
Held-to-maturity, 12 months or longer, Unrealized Losses (6,111) (5,256)
Held-to-maturity, Total, Estimated Fair Value 100,333 71,509
Held-to-maturity, Total, Unrealized Losses (6,227) (5,256)
Mortgage-backed securities: | Non-agency commercial    
Debt securities HTM:    
Held-to-maturity, Less than 12 months, Estimated Fair Value 0 459
Held-to-maturity, Less than 12 months, Unrealized Losses 0 (1)
Held-to-maturity, 12 months or longer, Estimated Fair Value 975 989
Held-to-maturity, 12 months or longer, Unrealized Losses (83) (82)
Held-to-maturity, Total, Estimated Fair Value 975 1,448
Held-to-maturity, Total, Unrealized Losses $ (83) $ (83)