Annual report pursuant to Section 13 and 15(d)

Loans Receivable - Additional Information (Detail)

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Loans Receivable - Additional Information (Detail)
 12 Months Ended
Dec. 31, 2023
USD ($)
Property
Dec. 31, 2022
USD ($)
Property
Dec. 31, 2021
USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loans receivable $ 6,182,434,000 $ 5,967,133,000  
Pledged loans receivable, carrying value 2,360,000,000    
Accrued interest on loans 23,371,000 18,537,000  
Loans held for sale, at the lower of cost or fair value 12,013,000 8,043,000 $ 13,342,000
Gains on sale of second draw PPP loans 5,701,000 9,478,000 17,266,000
Proceeds from sale of second draw PPP loans $ 100,514,000 $ 156,109,000  
Number of real estate properties | Property 1 1  
Other real estate owned ("OREO") $ 117,000 $ 117,000  
Total recorded investment 0 0 0
Interest income on nonaccrual loans 200,000 46,000 $ 700,000
Loans Pledged to Secure Advances      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Pledged loans receivable, carrying value 2,360,000,000 2,400,000,000  
Pass/Pass-Watch      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loans receivable 6,085,752,000 5,841,928,000  
Special Mention      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loans receivable 65,315,000 79,013,000  
Classified      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loans receivable 31,367,000 46,192,000  
Loans | Accrued Interest      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Accrued interest on loans 19,800,000 16,000,000.0  
Payment Protection Program      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loans receivable 200,000 900,000  
SBA Loans      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loans held for sale, at the lower of cost or fair value $ 12,000,000.0 $ 8,000,000.0