v3.25.3
Investment Securities - Schedule of Available-for-Sale Debt Securities in a Continuous Unrealized Loss Position (Details) - USD ($)
$ in Thousands
Sep. 30, 2025
Dec. 31, 2024
Debt Securities, Available-for-sale [Line Items]    
Less Than 12 Months, Fair Value $ 33,350 $ 1,540,233
Less Than 12 Months, Unrealized Loss (6) (23,539)
12 Months or Longer, Fair Value 1,025,542 1,612,391
12 Months or Longer, Unrealized Loss (100,601) (153,553)
Total, Fair Value 1,058,892 3,152,624
Total, Unrealized Loss (100,607) (177,092)
U.S. Treasury securities    
Debt Securities, Available-for-sale [Line Items]    
Less Than 12 Months, Fair Value   0
Less Than 12 Months, Unrealized Loss   0
12 Months or Longer, Fair Value   277,285
12 Months or Longer, Unrealized Loss   (2,852)
Total, Fair Value   277,285
Total, Unrealized Loss   (2,852)
Residential mortgage-backed securities    
Debt Securities, Available-for-sale [Line Items]    
Less Than 12 Months, Fair Value 23 1,338,801
Less Than 12 Months, Unrealized Loss 0 (18,141)
12 Months or Longer, Fair Value 1,014,549 1,323,180
12 Months or Longer, Unrealized Loss (100,147) (150,161)
Total, Fair Value 1,014,572 2,661,981
Total, Unrealized Loss (100,147) (168,302)
Commercial mortgage-backed securities    
Debt Securities, Available-for-sale [Line Items]    
Less Than 12 Months, Fair Value 33,327 201,432
Less Than 12 Months, Unrealized Loss (6) (5,398)
12 Months or Longer, Fair Value 0 0
12 Months or Longer, Unrealized Loss 0 0
Total, Fair Value 33,327 201,432
Total, Unrealized Loss (6) (5,398)
Credit risk transfer securities    
Debt Securities, Available-for-sale [Line Items]    
Less Than 12 Months, Fair Value 0 0
Less Than 12 Months, Unrealized Loss 0 0
12 Months or Longer, Fair Value 10,993 11,926
12 Months or Longer, Unrealized Loss (454) (540)
Total, Fair Value 10,993 11,926
Total, Unrealized Loss $ (454) $ (540)