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Pending Acquisition (Details) $ / shares in Units, $ in Thousands | Jun. 21, 2016 USD ($) $ / shares | Jun. 30, 2016 USD ($) | Dec. 31, 2015 USD ($) | Jun. 30, 2015 USD ($)
--- | --- | --- | --- | ---
Subsequent Event [Line Items] |  |  |  |
Total assets |  | $ 3,466,546 | $ 3,362,065 | $ 3,211,519
Total deposits |  | 2,872,020 | 2,811,285 | 2,653,127
Total loans |  | 2,598,134 | $ 2,518,926 | $ 2,412,779
Carolina Bank Holdings, Inc. [Member] |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Total purchase price | $ 97,300 |  |  |
Payments for acquisition per share | $ / shares | $ 20 |  |  |
Merger share conversion ratio | 1.002 |  |  |
Contribution of cash in total consideration | 25.00% |  |  |
Contribution of stock in total consideration | 75.00% |  |  |
Total assets |  | 706,000 |  |
Total deposits |  | 599,000 |  |
Total loans |  | $ 534,000 |  |

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