Credit Quality - Additional information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Financing Receivable, Allowance for Credit Losses [Line Items]
Minimum commercial loan relationships to be reviewed by loan review function	$ 3,000,000
Restructured loans to borrowers experiencing financial difficulty in excess of	250,000
Performing status returned period	6 months
Allowance for loan losses	1,840,000	1,870,000
Interest income recognized on loan restructurings	551,000	640,000	411,000
Covered Loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Accruing loans contractually past due 90 days or more	86,000
Waccamaw Bank
Financing Receivable, Allowance for Credit Losses [Line Items]
Percentage of loan and foreclosed real estate losses covered by FDIC	80.00%	80.00%
Amount of non-covered loans decreased	42,990,000
Percentage of non-covered loans decreased	27.68%
Amount of covered loans decreased	$ 84,150,000
Percentage of covered loans decreased	66.97%
Minimum
Financing Receivable, Allowance for Credit Losses [Line Items]
Number of impaired loans	4
Maximum
Financing Receivable, Allowance for Credit Losses [Line Items]
Number of impaired loans	7