v3.24.3
Investment Securities - Narrative (Details)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2024
USD ($)
security
Mar. 31, 2023
USD ($)
Sep. 30, 2024
USD ($)
security
Sep. 30, 2023
USD ($)
Dec. 31, 2023
USD ($)
Debt Securities, Available-for-sale [Line Items]          
Payments to acquire AFS securities, debt     $ 1,793,339 $ 849,392  
Number of securities in an unrealized loss position | security 43   43    
Expected loss on held-to-maturity securities     $ 0    
Allowance for credit losses on available-for-sale debt securities $ 0   0   $ 0
Allowance for credit losses on held-to-maturity debt securities $ 0   $ 0   0
Residential mortgage-backed securities          
Debt Securities, Available-for-sale [Line Items]          
Number of securities in an unrealized loss position | security 35   35    
U.S. Treasury securities          
Debt Securities, Available-for-sale [Line Items]          
Number of securities in an unrealized loss position | security 6   6    
CRT securities          
Debt Securities, Available-for-sale [Line Items]          
Number of securities in an unrealized loss position | security 2   2    
Deposits          
Debt Securities, Available-for-sale [Line Items]          
Available-for-sale debt securities pledged to secure certain customer repurchase agreements and deposits $ 425   $ 425   $ 1,600
Available-for-sale          
Debt Securities, Available-for-sale [Line Items]          
Available for Sale, debt securities, amortized cost basis, sold amount 1,200,000 $ 56,400 $ 1,200,000    
Realized gain 179,600 $ 489      
Available-for-sale | Residential mortgage-backed securities          
Debt Securities, Available-for-sale [Line Items]          
Payments to acquire AFS securities, debt $ 1,100,000