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Loans - Summary of Changes in Accretable Yield for PCI Loans (Detail) - PCI Loans
$ in Thousands
9 Months Ended
Sep. 30, 2019
USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]  
Balance Beginning $ 1,083
Accretion of acquisition accounting adjustment (305)
Reclassifications from nonaccretable balance, net 62
Other changes, net 153
Balance Ending $ 993