v3.25.1
Loans Receivable and Allowance for Credit Losses (Schedule of Summarized Loans Receivable) (Detail) - USD ($)
$ in Thousands
Mar. 31, 2025
Dec. 31, 2024
Servicing Liability at Amortized Cost [Line Items]    
Total gross loans $ 18,800,956 $ 18,667,570
Premiums on purchased loans 1,337 1,338
Net deferred fees (10,922) (9,538)
Total loans held for investment 18,791,371 18,659,370
Commercial    
Servicing Liability at Amortized Cost [Line Items]    
Total gross loans 7,295,651 7,228,078
Multi-family    
Servicing Liability at Amortized Cost [Line Items]    
Total gross loans 3,458,190 3,382,933
Construction    
Servicing Liability at Amortized Cost [Line Items]    
Total gross loans 756,356 823,503
Residential    
Servicing Liability at Amortized Cost [Line Items]    
Total gross loans 1,994,404 2,010,637
Mortgage loans    
Servicing Liability at Amortized Cost [Line Items]    
Total gross loans 13,504,601 13,445,151
Mortgage loans | Commercial    
Servicing Liability at Amortized Cost [Line Items]    
Total gross loans 7,295,651 7,228,078
Mortgage loans | Multi-family    
Servicing Liability at Amortized Cost [Line Items]    
Total gross loans 3,458,190 3,382,933
Mortgage loans | Construction    
Servicing Liability at Amortized Cost [Line Items]    
Total gross loans 756,356 823,503
Mortgage loans | Residential    
Servicing Liability at Amortized Cost [Line Items]    
Total gross loans 1,994,404 2,010,637
Commercial loans    
Servicing Liability at Amortized Cost [Line Items]    
Total gross loans 4,682,902 4,608,600
Consumer loans    
Servicing Liability at Amortized Cost [Line Items]    
Total gross loans $ 613,453 $ 613,819