Loans - Outstanding Loan Balances (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross portfolio loans	$ 597,995	$ 664,051
Less:
Deferred loan fees, net	(303)	(312)
Allowance for loan losses	14,172	11,103	10,622
Net loans	584,126	653,260
Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross portfolio loans	170,429	232,276
Real estate - construction loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross portfolio loans	18,545	16,863
Real estate - commercial (investor) [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross portfolio loans	205,384	211,318
Real estate - commercial (owner occupied) [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross portfolio loans	83,976	75,085
Real estate - ITIN loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross portfolio loans	56,101	60,105
Real estate - mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross portfolio loans	14,590	18,452
Real estate - equity lines [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross portfolio loans	45,462	45,181
Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross portfolio loans	3,472	4,422
Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross portfolio loans	$ 36	$ 349