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Investment Securities - Aggregate Unrealized Losses and Fair Value (Details)
$ in Thousands
Dec. 31, 2025
USD ($)
security
Dec. 31, 2024
USD ($)
security
Number  of Securities    
Less than 12 months | security 12 38
12 months or longer | security 155 261
Total | security 167 299
Fair  Value    
Less than 12 months $ 85,858 $ 231,698
12 months or longer 1,112,298 1,452,638
Total 1,198,156 1,684,336
Gross Unrealized Losses    
Less than 12 months (409) (7,324)
12 months or longer (192,167) (292,450)
Total $ (192,576) $ (299,774)
Agency securities    
Number  of Securities    
Less than 12 months | security   0
12 months or longer | security   1
Total | security   1
Fair  Value    
Less than 12 months   $ 0
12 months or longer   3,957
Total   3,957
Gross Unrealized Losses    
Less than 12 months   0
12 months or longer   (43)
Total   $ (43)
Collateralized mortgage obligations    
Number  of Securities    
Less than 12 months | security 0 7
12 months or longer | security 40 95
Total | security 40 102
Fair  Value    
Less than 12 months $ 0 $ 59,661
12 months or longer 463,133 636,472
Total 463,133 696,133
Gross Unrealized Losses    
Less than 12 months 0 (527)
12 months or longer (91,137) (138,898)
Total $ (91,137) $ (139,425)
Residential    
Number  of Securities    
Less than 12 months | security 2 2
12 months or longer | security 43 63
Total | security 45 65
Fair  Value    
Less than 12 months $ 9,718 $ 19,183
12 months or longer 272,276 367,877
Total 281,994 387,060
Gross Unrealized Losses    
Less than 12 months (19) (1,029)
12 months or longer (48,086) (85,010)
Total $ (48,105) $ (86,039)
Commercial    
Number  of Securities    
Less than 12 months | security 7 10
12 months or longer | security 41 57
Total | security 48 67
Fair  Value    
Less than 12 months $ 64,572 $ 70,728
12 months or longer 272,407 340,123
Total 336,979 410,851
Gross Unrealized Losses    
Less than 12 months (320) (2,406)
12 months or longer (42,837) (53,672)
Total $ (43,157) $ (56,078)
Asset-backed securities    
Number  of Securities    
Less than 12 months | security 1 1
12 months or longer | security 0 0
Total | security 1 1
Fair  Value    
Less than 12 months $ 5,003 $ 5,007
12 months or longer 0 0
Total 5,003 5,007
Gross Unrealized Losses    
Less than 12 months (4) (14)
12 months or longer 0 0
Total $ (4) $ (14)
Corporate securities    
Number  of Securities    
Less than 12 months | security 1 0
12 months or longer | security 4 6
Total | security 5 6
Fair  Value    
Less than 12 months $ 3,946 $ 0
12 months or longer 17,190 20,694
Total 21,136 20,694
Gross Unrealized Losses    
Less than 12 months (54) 0
12 months or longer (1,819) (2,560)
Total $ (1,873) $ (2,560)
Municipal securities    
Number  of Securities    
Less than 12 months | security 1 18
12 months or longer | security 27 39
Total | security 28 57
Fair  Value    
Less than 12 months $ 2,619 $ 77,119
12 months or longer 87,292 83,515
Total 89,911 160,634
Gross Unrealized Losses    
Less than 12 months (12) (3,348)
12 months or longer (8,288) (12,267)
Total $ (8,300) $ (15,615)