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Pending Acquisition (Details) - Asheville Savings Bank [Member] $ / shares in Units, $ in Thousands |  | 6 Months Ended |
--- | --- | --- | ---
May 01, 2017 USD ($) $ / shares shares | Jun. 30, 2017 USD ($) | Apr. 28, 2017 $ / shares
Restructuring Cost and Reserve [Line Items] |  |  |
Cash and Stock transaction value | $ 175,000 |  |
Closing stock price | $ / shares |  |  | $ 43.12
Banking location |  | 13 |
Assets |  | $ 801,000 |
Gross loan |  | 614,000 |
Deposits |  | $ 677,000 |
First Bancorp Plans [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Shareholders received shares per share | shares | 1.44 |  |
Shareholders received cash per share | $ / shares | $ 41.90 |  |
Percentage of total outstanding shares | 90.00% |  |
Maximum Number of shares exchange | 10.00% |  |
Maximum Number of shares exchange not be exceed | 19.90% |  |

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