Loans Receivable and Allowance for Loan Losses - Summary of Loan Portfolio, Excluding Residential Loans Held for Sale, Broken Out by Classes (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Summary of loan portfolio, excluding residential loans held for sale, broken out by classes
Total Loans	$ 680,374	$ 671,037
Commercial Real Estate [Member]
Summary of loan portfolio, excluding residential loans held for sale, broken out by classes
Total Loans	314,907	325,397
Commercial Real Estate [Member] | Owner-Occupied [Member]
Summary of loan portfolio, excluding residential loans held for sale, broken out by classes
Total Loans	97,401	111,290
Commercial Real Estate [Member] | Non-Owner Occupied [Member]
Summary of loan portfolio, excluding residential loans held for sale, broken out by classes
Total Loans	142,146	135,953
Commercial Real Estate [Member] | Multi - Family [Member]
Summary of loan portfolio, excluding residential loans held for sale, broken out by classes
Total Loans	26,801	22,882
Commercial Real Estate [Member] | Non-Owner Occupied Residential [Member]
Summary of loan portfolio, excluding residential loans held for sale, broken out by classes
Total Loans	48,559	55,272
Acquisition and Development [Member]
Summary of loan portfolio, excluding residential loans held for sale, broken out by classes
Total Loans	20,777	22,778
Acquisition and Development [Member] | 1-4 Family Residential Construction [Member]
Summary of loan portfolio, excluding residential loans held for sale, broken out by classes
Total Loans	5,297	3,338
Acquisition and Development [Member] | Commercial and Land Development [Member]
Summary of loan portfolio, excluding residential loans held for sale, broken out by classes
Total Loans	15,480	19,440
Commercial and Industrial [Member]
Summary of loan portfolio, excluding residential loans held for sale, broken out by classes
Total Loans	45,125	33,446
Municipal [Member]
Summary of loan portfolio, excluding residential loans held for sale, broken out by classes
Total Loans	62,385	60,996
Residential Mortgage [Member]
Summary of loan portfolio, excluding residential loans held for sale, broken out by classes
Total Loans	231,058	222,236
Residential Mortgage [Member] | First Lien [Member]
Summary of loan portfolio, excluding residential loans held for sale, broken out by classes
Total Loans	126,552	124,728
Residential Mortgage [Member] | Home Equity - Term [Member]
Summary of loan portfolio, excluding residential loans held for sale, broken out by classes
Total Loans	20,833	20,131
Residential Mortgage [Member] | Home Equity - Lines of Credit [Member]
Summary of loan portfolio, excluding residential loans held for sale, broken out by classes
Total Loans	83,673	77,377
Installment and Other Loans [Member]
Summary of loan portfolio, excluding residential loans held for sale, broken out by classes
Total Loans	$ 6,122	$ 6,184