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Allowance for Loan Losses - Allowance by Impairment Methodology and Loans by Impairment Methodology (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Allowance for loan losses:
Beginning Balance	$ 6,718	$ 10,644
Charge-offs	(1,838)	(927)
Recoveries	744	851
Provision for (recovery of) loan losses	(100)	(3,850)
Ending Balance	5,524	6,718
Ending Balance:
Allowance for loan losses, Individually evaluated for impairment	544	1,907
Allowance for loan losses, Collectively evaluated for impairment	4,980	4,811
Loans:
Ending Balance	438,999	378,410
Loans, Individually evaluated for impairment	7,705	13,922
Loans, Collectively evaluated for impairment	431,294	364,488
Construction and Land Development [Member]
Allowance for loan losses:
Beginning Balance	1,403	2,710
Charge-offs		(91)
Recoveries	4	80
Provision for (recovery of) loan losses	125	(1,296)
Ending Balance	1,532	1,403
Ending Balance:
Allowance for loan losses, Individually evaluated for impairment	326	245
Allowance for loan losses, Collectively evaluated for impairment	1,206	1,158
Loans:
Ending Balance	33,135	29,475
Loans, Individually evaluated for impairment	2,544	3,205
Loans, Collectively evaluated for impairment	30,591	26,270
Secured by 1-4 Family Residential [Member]
Allowance for loan losses:
Beginning Balance	1,204	2,975
Charge-offs	(142)	(272)
Recoveries	373	15
Provision for (recovery of) loan losses	(496)	(1,514)
Ending Balance	939	1,204
Ending Balance:
Allowance for loan losses, Individually evaluated for impairment	23	173
Allowance for loan losses, Collectively evaluated for impairment	916	1,031
Loans:
Ending Balance	189,286	163,727
Loans, Individually evaluated for impairment	2,044	3,414
Loans, Collectively evaluated for impairment	187,242	160,313
Other Real Estate [Member]
Allowance for loan losses:
Beginning Balance	3,658	4,418
Charge-offs	(1,125)	(203)
Recoveries	2	509
Provision for (recovery of) loan losses	(1)	(1,066)
Ending Balance	2,534	3,658
Ending Balance:
Allowance for loan losses, Individually evaluated for impairment	195	1,456
Allowance for loan losses, Collectively evaluated for impairment	2,339	2,202
Loans:
Ending Balance	181,447	151,802
Loans, Individually evaluated for impairment	3,023	7,183
Loans, Collectively evaluated for impairment	178,424	144,619
Commercial and Industrial [Member]
Allowance for loan losses:
Beginning Balance	310	442
Charge-offs	(59)	(43)
Recoveries	72	18
Provision for (recovery of) loan losses	(17)	(107)
Ending Balance	306	310
Ending Balance:
Allowance for loan losses, Individually evaluated for impairment		33
Allowance for loan losses, Collectively evaluated for impairment	306	277
Loans:
Ending Balance	24,048	21,166
Loans, Individually evaluated for impairment	94	120
Loans, Collectively evaluated for impairment	23,954	21,046
Consumer and Other Loans [Member]
Allowance for loan losses:
Beginning Balance	143	99
Charge-offs	(512)	(318)
Recoveries	293	229
Provision for (recovery of) loan losses	289	133
Ending Balance	213	143
Ending Balance:
Allowance for loan losses, Collectively evaluated for impairment	213	143
Loans:
Ending Balance	11,083	12,240
Loans, Collectively evaluated for impairment	$ 11,083	$ 12,240

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Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts.

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-Publisher FASB
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Amount of loans and leases that have been written off from both loan receivables and allowance reserve for credit loss.

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Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

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Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

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