v3.26.1
Investment Securities (Schedule of the Aggregate Fair Value and Amount by which Amortized Cost Exceeds Fair Value for Investment Securities that are in Unrealized Loss Positions) (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Fair Value    
Less than 12 Months $ 1,981,824 $ 602,274
12 Months or Greater 3,173,902 3,770,668
Total 5,155,726 4,372,942
Unrealized Losses    
Less than 12 Months (15,209) (2,463)
12 Months or Greater (289,217) (291,388)
Total (304,426) (293,851)
U.S. Treasury securities    
Fair Value    
Less than 12 Months 170,101 125,467
12 Months or Greater 67,520 97,812
Total 237,621 223,279
Unrealized Losses    
Less than 12 Months (3,908) (825)
12 Months or Greater (7,407) (7,018)
Total (11,315) (7,843)
U.S. Government agency and sponsored enterprise residential MBS    
Fair Value    
Less than 12 Months 252,831 128,974
12 Months or Greater 445,933 637,536
Total 698,764 766,510
Unrealized Losses    
Less than 12 Months (2,302) (471)
12 Months or Greater (10,626) (15,207)
Total (12,928) (15,678)
U.S. Government agency and sponsored enterprise commercial MBS    
Fair Value    
Less than 12 Months 289,921 36,046
12 Months or Greater 346,875 384,952
Total 636,796 420,998
Unrealized Losses    
Less than 12 Months (3,351) (140)
12 Months or Greater (43,182) (42,767)
Total (46,533) (42,907)
Private label residential MBS and CMOs    
Fair Value    
Less than 12 Months 535,506 83,348
12 Months or Greater 1,771,680 1,897,018
Total 2,307,186 1,980,366
Unrealized Losses    
Less than 12 Months (3,309) (101)
12 Months or Greater (198,944) (195,457)
Total (202,253) (195,558)
Private label commercial MBS    
Fair Value    
Less than 12 Months 203,597 134,630
12 Months or Greater 232,470 424,672
Total 436,067 559,302
Unrealized Losses    
Less than 12 Months (1,128) (134)
12 Months or Greater (19,793) (19,757)
Total (20,921) (19,891)
Single family real estate-backed securities    
Fair Value    
Less than 12 Months 19,968 0
12 Months or Greater 137,882 151,818
Total 157,850 151,818
Unrealized Losses    
Less than 12 Months (19) 0
12 Months or Greater (1,911) (1,977)
Total (1,930) (1,977)
Collateralized loan obligations    
Fair Value    
Less than 12 Months 461,288 37,511
12 Months or Greater 64,648 60,791
Total 525,936 98,302
Unrealized Losses    
Less than 12 Months (710) (305)
12 Months or Greater (556) (913)
Total (1,266) (1,218)
Non-mortgage asset-backed securities    
Fair Value    
Less than 12 Months 44,120 44,173
12 Months or Greater 12,378 14,592
Total 56,498 58,765
Unrealized Losses    
Less than 12 Months (351) (298)
12 Months or Greater (634) (879)
Total (985) (1,177)
State and municipal obligations    
Fair Value    
Less than 12 Months 4,492 12,125
12 Months or Greater 47,598 47,255
Total 52,090 59,380
Unrealized Losses    
Less than 12 Months (131) (189)
12 Months or Greater (4,658) (5,676)
Total (4,789) (5,865)
SBA securities    
Fair Value    
Less than 12 Months 0 0
12 Months or Greater 46,918 54,222
Total 46,918 54,222
Unrealized Losses    
Less than 12 Months 0 0
12 Months or Greater (1,506) (1,737)
Total $ (1,506) $ (1,737)