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Business Combination - Additional Information (Detail) (USD $) |  | 0 Months Ended |
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Jul. 17, 2012 | Nov. 12, 2013 SCB Bancorp [Member] | Dec. 31, 2013 SCB Bancorp [Member]
Business Combination Transactions [Line Items] |  |  |
Exchange ratio per share to SCB shareholder |  | $ 0.4904 |
Cash paid for each share to SCB shareholder |  | $ 5.15 |
Market closing price per share |  | $ 21.43 |
Estimated transaction value |  | $ 18,400,000 |
Reported total assets of acquiree | 245,644,000 |  | 159.7
Total deposits held by acquiree | 218,728,000 |  | 124.7
Total loans of acquiree |  |  | $ 135.9

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