Loans - Information Relating to Loans (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
NET LOAN BALANCES	$ 1,304,207	$ 1,226,081
Construction and Land Development [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
NET LOAN BALANCES	67,450	60,736
Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
NET LOAN BALANCES	520,382	486,828
Residential Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
NET LOAN BALANCES	592,746	569,331
Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
NET LOAN BALANCES	280	353
Commercial and Financial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
NET LOAN BALANCES	78,636	61,903
Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
NET LOAN BALANCES	$ 44,713	$ 46,930