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Investment Securities - Narrative (Details)
$ in Thousands
1 Months Ended 12 Months Ended
Sep. 30, 2022
USD ($)
Jun. 30, 2022
USD ($)
Dec. 31, 2022
USD ($)
security
Dec. 31, 2021
USD ($)
security
Dec. 31, 2020
USD ($)
Debt Securities, Available-for-sale [Line Items]          
Proceeds from sales of investment securities available for sale     $ 983,575 $ 689,856 $ 387,810
Proceeds from sales of foreign subsidiaries     0 3,765 0
Loss on sale of foreign subsidiaries     0 2,840 0
Unrealized gain (loss) on investment securities     $ (710) $ 2,720 1,447
Number of available-for-sale investment securities in the less than twelve month category (security) | security     93    
Number of available-for-sale investment securities in the twelve month or more category (security) | security     63    
Number of asset-backed securities with deterioration in future estimated cash flows | security     4    
Number of available-for-sale investment securities, unrealized loss position | security     156 117  
Accrued interest on held-to-maturity debt securities     $ 1,000    
Debt Securities, Held-to-Maturity, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration]     Accrued interest receivable    
Transfer of investment securities available for sale to held to maturity   $ 500,200 $ 500,174 $ 0 0
Unrealized losses recorded in AOCI upon transfer to held to maturity   $ 50,000      
Carrying value of consumer loans sold $ 521,800        
Loss on sale of loans 23,500   20,300 (12,900) (2,000)
Debt securities, held-to-maturity, allowance for credit loss, excluding accrued interest     0    
Allowance for Credit Losses     578    
Variable Interest Entity, Not Primary Beneficiary          
Debt Securities, Available-for-sale [Line Items]          
Asset-backed securities collateralized by loans sold $ 400,000        
Asset Pledged as Collateral          
Debt Securities, Available-for-sale [Line Items]          
Pledged investment securities transferred from available for sale to held to maturity     16,700 11,300  
Interest-only GNMA securities          
Debt Securities, Available-for-sale [Line Items]          
Proceeds from sales of investment securities available for sale         15,400
Debt securities, realized gain         $ 1,000
Asset-backed securities          
Debt Securities, Available-for-sale [Line Items]          
Debt securities, held-to-maturity, allowance for credit loss, excluding accrued interest     0    
Allowance for Credit Losses     $ 578 $ 0