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Loans Receivable - Additional Information (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Jun. 30, 2024
Dec. 31, 2023
Jun. 30, 2023
Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Allowance for credit loss $ 312,574 $ 285,562 $ 312,574 $ 285,562 $ 295,856 $ 288,234 $ 285,683 $ 289,669
Deteriorated Credit Quality | Accounting Standards Update 2016-13 | Cumulative Effect Period of Adoption Adjustment                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Allowance for credit loss 79,600   79,600     130,700    
Mortgage Loans                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Mortgage loans held for sale 92,000   92,000     $ 123,400    
SBA Loans                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Loans sold during period 1,800 1,000 5,100 3,200        
Gain on sale of guaranteed portion of loans $ 145 $ 97 $ 399 $ 236