Commitments and Contingencies - Summary of Commitments to Extend Credit (Detail) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Loan commitments [Member]
Loss Contingencies [Line Items]
Commitments to extend credit	$ 162,212	$ 149,561
Standby letters of credit [Member]
Loss Contingencies [Line Items]
Commitments to extend credit	$ 1,033	$ 382

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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