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Loans (Detail) - USD ($)
$ in Millions
Mar. 31, 2017
Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable    
Deferred loan origination fees $ 22.6 $ 0.0
Deposit liabilities reclassified as loans receivable 4.0 $ 4.2
Loans with carrying value pledged to secure public deposits and other borrowings $ 4,500.0