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Loans Receivable, Net - PCI Loans Acquired (Detail) - Colonial American Bank [Member]
$ in Thousands
Jul. 31, 2015
USD ($)
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]  
Contractually required principal and interest $ 1,610
Contractual cash flows not expected to be collected (non-accretable discount) (1,049)
Expected cash flows to be collected at acquisition 561
Interest component of expected cash flows (accretable yield) (91)
Fair value of acquired loans $ 470