Loans and Allowance for Loan Losses - Schedule of Troubled Debt Restructurings (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2015 USD ($) Contract	Dec. 31, 2014 USD ($) Contract
Financing Receivable, Recorded Investment, Past Due [Line Items]
Number | Contract	4	1
Balance | $	$ 113	$ 32
Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Number | Contract	1
Balance | $	$ 66
Real Estate Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Number | Contract	1
Balance | $	$ 15
Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Number | Contract	2	1
Balance | $	$ 32	$ 32