Quarterly report pursuant to Section 13 or 15(d)

Loans, Net - Summary of Loans (Parenthetical) (Details)

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Loans, Net - Summary of Loans (Parenthetical) (Details) - USD ($)
$ in Millions
Mar. 31, 2018
Dec. 31, 2017
Accounts Notes And Loans Receivable [Line Items]    
Deferred fees, cost, premium and discount $ (3.5) $ (3.4)
SBA Loans    
Accounts Notes And Loans Receivable [Line Items]    
Unguaranteed portion of loans $ 70.1 $ 67.1