Credit Quality - Additional information (Detail) - USD ($) |
9 Months Ended | |
|---|---|---|
Sep. 30, 2016 |
Dec. 31, 2015 |
|
| Financing Receivable, Allowance for Credit Losses [Line Items] | ||
| Restructured loans to borrowers experiencing financial difficulty in excess of | $ 250,000 | |
| Performing status returned period | 6 months | |
| Covered Loans Recorded as TDR | $ 14,762,000 | $ 15,301,000 |
| Waccamaw Bank | ||
| Financing Receivable, Allowance for Credit Losses [Line Items] | ||
| Percentage of loan and foreclosed real estate losses covered by FDIC | 80.00% | |
| Non Covered Loans | ||
| Financing Receivable, Allowance for Credit Losses [Line Items] | ||
| Accruing loans contractually past due 90 days or more | $ 62,000 | 0 |
| Covered Loans | ||
| Financing Receivable, Allowance for Credit Losses [Line Items] | ||
| Covered Loans Recorded as TDR | $ 0 | $ 0 |