Loans And Allowance For Loan Losses (Loan Portfolio By Credit Quality Indicator) (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Financing Receivable, Recorded Investment [Line Items]
Gross loans	$ 120,234	$ 130,472
Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans	2,777	5,873
Construction And Land Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans	8,692	8,868
Residential, 1-4 Families [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans	28,075	26,568
Residential, 5 Or More Families [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans	3,746	4,717
Farmland [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans	1,275	1,306
Nonfarm, Nonresidential [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans	70,681	75,879
Agriculture [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans	39	9
Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans	937	2,487
Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans	4,012	4,765
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans	106,802	111,420
Pass [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans	2,777	3,161
Pass [Member] | Construction And Land Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans	3,613	5,671
Pass [Member] | Residential, 1-4 Families [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans	27,855	25,730
Pass [Member] | Residential, 5 Or More Families [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans	3,746	3,890
Pass [Member] | Farmland [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans	1,275	1,306
Pass [Member] | Nonfarm, Nonresidential [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans	62,548	64,401
Pass [Member] | Agriculture [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans	39	9
Pass [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans	937	2,487
Pass [Member] | Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans	4,012	4,765
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans	3,746	3,263
Special Mention [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans
Special Mention [Member] | Construction And Land Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans	1,893
Special Mention [Member] | Residential, 1-4 Families [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans
Special Mention [Member] | Residential, 5 Or More Families [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans		827
Special Mention [Member] | Farmland [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans
Special Mention [Member] | Nonfarm, Nonresidential [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans	1,853	2,436
Special Mention [Member] | Agriculture [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans
Special Mention [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans
Special Mention [Member] | Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans
Sub-Standard [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans	9,686	15,789
Sub-Standard [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans		2,712
Sub-Standard [Member] | Construction And Land Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans	3,186	3,197
Sub-Standard [Member] | Residential, 1-4 Families [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans	220	838
Sub-Standard [Member] | Residential, 5 Or More Families [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans
Sub-Standard [Member] | Farmland [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans
Sub-Standard [Member] | Nonfarm, Nonresidential [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans	6,280	9,042
Sub-Standard [Member] | Agriculture [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans
Sub-Standard [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans
Sub-Standard [Member] | Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans
Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans
Doubtful [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans
Doubtful [Member] | Construction And Land Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans
Doubtful [Member] | Residential, 1-4 Families [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans
Doubtful [Member] | Residential, 5 Or More Families [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans
Doubtful [Member] | Farmland [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans
Doubtful [Member] | Nonfarm, Nonresidential [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans
Doubtful [Member] | Agriculture [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans
Doubtful [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans
Doubtful [Member] | Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans