Quarterly report pursuant to Section 13 or 15(d)

Loans, Net - Additional Information (Details)

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Loans, Net - Additional Information (Details) - USD ($)
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Dec. 31, 2017
Accounts Notes And Loans Receivable [Line Items]      
Pledged loans, collateral for FHLB advances $ 359,500,000   $ 358,200,000
Unfunded commitments to related parties 126,653,000   134,627,000
Executive Officers and Directors      
Accounts Notes And Loans Receivable [Line Items]      
Unfunded commitments to related parties 0   0
Consumer Mortgage Loans      
Accounts Notes And Loans Receivable [Line Items]      
Recorded mortgage loans in process of foreclosure 0   $ 0
SBA Loans      
Accounts Notes And Loans Receivable [Line Items]      
Servicing loans sold 17,100,000 $ 13,500,000  
Realized gains on servicing loans sold $ 1,500,000 $ 1,000,000