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ACQUISITIONS AND FDIC INDEMNIFICATION ASSET: (Details Textual) - USD ($) | 3 Months Ended | 9 Months Ended | 12 Months Ended | 54 Months Ended |
--- | --- | --- | --- | --- | ---
Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Sep. 30, 2018 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2013 | Aug. 16, 2013
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain on Sale of certain assets and liabilities of Insurance Brokerage Operation |  | $ (199,000) |  |  |  |  |  |  | $ 12,800,000 | $ 0 | $ 0 | $ 12,822,000 |  |
Deposits | $ 2,436,727,000 |  |  |  | $ 2,458,653,000 |  |  |  |  | 2,436,727,000 | 2,458,653,000 |  |  |
Goodwill | 34,355,000 |  |  |  | 34,355,000 |  |  |  |  | 34,355,000 | 34,355,000 |  |  |
Reimbursements from the FDIC |  |  |  |  |  |  |  |  |  |  |  |  | $ (24,300,000) |
Covered loans | 3,200,000 |  |  |  | 4,300,000 |  |  |  |  | 3,200,000 | 4,300,000 |  |  |
Assets | 3,008,718,000 |  |  |  | 3,000,668,000 |  |  |  |  | 3,008,718,000 | 3,000,668,000 |  |  |
Net Income (Loss) Attributable to Parent | $ 11,056,000 | $ 11,313,000 | $ 15,261,000 | $ 8,953,000 | 2,616,000 | $ 8,794,000 | $ 8,352,000 | $ 9,369,000 |  | 46,583,000 | 29,131,000 | 38,413,000 |  |
Bank of America |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill recorded, which is expected to be tax deductable |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,900
First National Bank Of Danville |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Losses on assets, threshold under loss-sharing agreement (up to $29 million) |  |  |  |  |  |  |  |  |  | $ 29,000,000 |  |  |  |
Percentage of losses to be reimbursed by the FDIC, on losses up to the threshold amount (percent) |  |  |  |  |  |  |  |  |  | 80.00% |  |  |  |
Percentage of losses to be reimbursed by the FDIC, on losses exceeding the threshold amount (percent) |  |  |  |  |  |  |  |  |  | 95.00% |  |  |  |
Forrest Sherer Insurance [Domain] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  |  | 7,600,000 | 8,300,000 |  |
Operating Income (Loss) |  |  |  |  |  |  |  |  |  |  | 168,000 | 544,000 |  |
Goodwill |  |  |  | $ 5,100,000 |  |  |  |  |  |  |  |  |  |
Assets |  |  |  |  | $ 13,000,000 |  |  |  |  |  | $ 13,000,000 | $ 15,800,000 |  |

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