Quarterly report pursuant to Section 13 or 15(d)

Loans, Net - Additional Information (Details)

v3.20.2
Loans, Net - Additional Information (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Dec. 31, 2019
Accounts Notes And Loans Receivable [Line Items]          
Pledged loans, collateral for FHLB advances $ 793,000,000.0   $ 793,000,000.0   $ 668,500,000
Pledged loans, collateral under PPPLF 173,700,000   173,700,000   0
Amount outstanding [1] 2,452,353,000   2,452,353,000   1,767,182,000
Unfunded commitments to related parties 262,884,000   262,884,000   244,800,000
Executive Officers and Directors          
Accounts Notes And Loans Receivable [Line Items]          
Unfunded commitments to related parties 1,600,000   1,600,000   861,000
Loan Held for Investment and Long-term Borrowings          
Accounts Notes And Loans Receivable [Line Items]          
Secured borrowings 4,000,000.0   4,000,000.0   14,700,000
Consumer Mortgage Loans          
Accounts Notes And Loans Receivable [Line Items]          
Recorded mortgage loans in process of foreclosure 0   0   0
SBA Loans          
Accounts Notes And Loans Receivable [Line Items]          
Paycheck protection program loans under CARES Act 421,100,000   $ 421,100,000    
PPP loan interest rate     1.00%    
Deferred origination costs     $ 4,900,000    
Deferred origination fees     $ 15,300,000    
Weighted average life of debt     1 year 7 months 6 days    
Amount outstanding $ 173,700,000   $ 173,700,000    
Interest rate 0.35%   0.35%    
Unpaid principal balances of loans serviced $ 199,500,000   $ 199,500,000   $ 205,000,000.0
SBA Loans | Third Party          
Accounts Notes And Loans Receivable [Line Items]          
Servicing loans sold 7,300,000 $ 13,800,000 17,400,000 $ 40,300,000  
Realized gains on servicing loans sold $ 612,000 $ 1,200,000 $ 1,400,000 $ 3,300,000  
SBA Loans | Minimum          
Accounts Notes And Loans Receivable [Line Items]          
Paycheck protection program loans contractual term     2 years    
SBA Loans | Maximum          
Accounts Notes And Loans Receivable [Line Items]          
Paycheck protection program loans contractual term     5 years    
[1] Organic loans balance includes $(11.9) million and $(4.2) million of deferred fees, cost, premium and discount as of September 30, 2020 and December 31, 2019, respectively.