Loans - Summary of Loans by Credit Quality Indicator (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Financing Receivable, Recorded Investment [Line Items]
Total Loans	$ 411,624	$ 378,882
Construction & land development [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	9,876	13,444
Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	133,237	117,478
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	142,574	129,828
Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	118,546	111,445
Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	7,391	6,687
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	251,082	226,167
Pass [Member] | Construction & land development [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	5,294	9,470
Pass [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	113,962	101,195
Pass [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	131,598	115,265
Pass [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	228	237
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	18,638	20,015
Special Mention [Member] | Construction & land development [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	3,354	587
Special Mention [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	8,696	10,352
Special Mention [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	6,588	9,076
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	12,294	11,038
Substandard [Member] | Construction & land development [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans		1,884
Substandard [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	8,664	5,066
Substandard [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	3,586	4,041
Substandard [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	44	47
Not Rated [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	129,610	121,662
Not Rated [Member] | Construction & land development [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	1,228	1,503
Not Rated [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	1,915	865
Not Rated [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	802	1,446
Not Rated [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	118,274	111,161
Not Rated [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	$ 7,391	$ 6,687