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National Commerce Corporation (Parent Company Only) Financial Information - Statements of Cash Flows (Parenthetical) (Detail) (Parent Company [Member], USD $)
In Thousands, unless otherwise specified |
12 Months Ended | ||
|---|---|---|---|
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Dec. 31, 2014
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Dec. 31, 2013
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Dec. 31, 2012
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Parent Company [Member]
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| Supplemental Cash Flow Information [Line Items] | |||
| Proceeds from stock offering net of expenses | $ 28 | $ 28 | $ 28 |