v3.26.3
Investments - Narrative (Details)
$ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Mar. 31, 2025
USD ($)
Sep. 30, 2026
USD ($)
security
Dec. 31, 2025
USD ($)
security
Investments, Debt and Equity Securities [Abstract]      
Vertical risk retention interest   5.00%  
Trading investments   $ 41,308 $ 49,250
Number of government sponsored securities with unrealized losses | security   272 179
Number of mortgage-backed securities | security   310 295
Par value of mortgage-backed securities pledged to FRB   $ 2,100,000 $ 641,000
Equity securities without readily determinable fair value, downward price adjustment, annual amount $ 10,000    
Non-marketable securities investment   10,000 12,000
Low income housing tax credit investments   87,000 96,000
Liability for unfunded commitments   29,000 36,000
Low income housing tax credit investments, tax credits and benefits (less than)   $ 2,000 $ 14,000
Low income housing tax credit investments, expected tax benefits recognized   25.00%