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Loans Receivable - Additional Information (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Jun. 30, 2025
Dec. 31, 2024
Jun. 30, 2024
Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Allowance for credit loss $ 285,649 $ 312,574 $ 285,649 $ 312,574 $ 281,869 $ 275,880 $ 295,856 $ 288,234
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 54,200   54,200     76,300    
Mortgage Loans                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Mortgage loans held for sale 163,900   163,900     $ 98,700    
SBA Loans                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Loans sold during period 640 1,800 4,600 5,100        
Gain on sale of guaranteed portion of loans $ 46 $ 145 $ 334 $ 399