Loans - Schedule of Aging of Past Due and Nonaccrual Loans (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	$ 405,454	$ 374,096
30 - 59 Days Past Due	834	865
60 - 89 Days Past Due	305	651
90 Days + Past Due	280	1,036
Non-Accrual	4,751	2,234
Total Past Due and Non-Accrual	6,170	4,786
Total ending loans balance	411,624	378,882
Construction & land development [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	9,865	12,494
30 - 59 Days Past Due	11
60 - 89 Days Past Due
90 Days + Past Due		950
Non-Accrual
Total Past Due and Non-Accrual	11	950
Total ending loans balance	9,876	13,444
Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	130,938	117,342
30 - 59 Days Past Due	20	15
60 - 89 Days Past Due	21	37
90 Days + Past Due
Non-Accrual	2,258	84
Total Past Due and Non-Accrual	2,299	136
Total ending loans balance	133,237	117,478
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	140,845	128,462
30 - 59 Days Past Due	32	111
60 - 89 Days Past Due	141	107
90 Days + Past Due	100	40
Non-Accrual	1,456	1,108
Total Past Due and Non-Accrual	1,729	1,366
Total ending loans balance	142,574	129,828
Residential Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	116,494	109,274
30 - 59 Days Past Due	692	616
60 - 89 Days Past Due	143	467
90 Days + Past Due	180	46
Non-Accrual	1,037	1,042
Total Past Due and Non-Accrual	2,052	2,171
Total ending loans balance	118,546	111,445
Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	7,312	6,524
30 - 59 Days Past Due	79	123
60 - 89 Days Past Due		40
90 Days + Past Due
Non-Accrual
Total Past Due and Non-Accrual	79	163
Total ending loans balance	$ 7,391	$ 6,687