Loans Receivable, Net - Risk Category of Loans by Class of Loans (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Financing Receivable, Recorded Investment [Line Items]
Loan	$ 617,004	$ 589,490
Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan	66,196	60,545
Commercial Real Estate [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan	518,524	502,868
Commercial Real Estate [Member] | Construction and Land [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan	32,284	26,077
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan	576,863	555,542
Pass [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan	64,898	59,089
Pass [Member] | Commercial Real Estate [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan	480,787	471,435
Pass [Member] | Commercial Real Estate [Member] | Construction and Land [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan	31,178	25,018
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan	5,657	1,070
Special Mention [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan	683	1,070
Special Mention [Member] | Commercial Real Estate [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan	4,974
Special Mention [Member] | Commercial Real Estate [Member] | Construction and Land [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan	33,648	32,021
Substandard [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan	615	386
Substandard [Member] | Commercial Real Estate [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan	31,927	30,576
Substandard [Member] | Commercial Real Estate [Member] | Construction and Land [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan	1,106	1,059
Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan	836	857
Doubtful [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan
Doubtful [Member] | Commercial Real Estate [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan	836	857
Doubtful [Member] | Commercial Real Estate [Member] | Construction and Land [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan