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Equity-Based Compensation Plans (Narrative) (Details) - USD ($) | 12 Months Ended | 24 Months Ended | 36 Months Ended
--- | --- | --- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2016 | Dec. 31, 2016
Stock based compensation expense |  | $ 714,000 | $ 710,000 | $ 270,000 |  |
Stock based compensation, income tax benefit |  | 264,000 | 277,000 | 105,000 |  |
Proceeds from stock options exercised |  | 375,000 | 112,000 | 70,000 |  |
Non-Employee Directors [Member] |  |  |  |  |  |
Director equity grants granted, value |  | 16,000 | 16,000 |  |  |
Stock based compensation expense |  | 129,000 | 129,000 | $ 177,000 |  |
Senior Executives [Member] |  |  |  |  |  |
Total compensation expense associated with senior executives grants |  | 556,000 |  |  | $ 556,000 | $ 556,000
Stock based compensation expense |  | 220,000 | $ 93,000 |  |  |
Vesting period |  |  |  | 3 years |  |
Grants in period (options) |  |  |  |  | 40,914 |
Percent of bonus earned under the incentive plan in cash |  |  |  | 50.00% |  |
Percent of bonus earned under the incentive plan in shares of restricted stock |  |  |  | 50.00% |  |
Employees [Member] |  |  |  |  |  |
Stock based compensation expense |  | $ 1,900 |  |  |  |
Vesting period |  | 3 years |  |  |  |
Grants in period (options) |  | 105,616 | 105,616 | 105,616 |  |
Proceeds from stock options exercised |  | $ 366,000 | $ 488,092 | $ 93,000 |  |
Nineteen Officers [Member] |  |  |  |  |  |
Vesting period |  |  |  |  |  | 3 years
Grants in period (options) |  |  |  |  |  | 105,616
Restricted Stock [Member] | Scenario, Forecast [Member] |  |  |  |  |  |
Stock based compensation expense | $ 546,000 |  |  |  |  |
First Bancorp Plans [Member] |  |  |  |  |  |
Vesting period |  | 10 years |  |  |  |
Exercise price range - floor |  | $ 14.35 |  |  |  |
Exercise prices range - ceiling |  | $ 20.80 |  |  |  |
Stock options outstanding |  | 59,948 |  |  | 59,948 | 59,948
First Bancorp Plans [Member] | February 2014 Award [Member] |  |  |  |  |  |
Shares remaining available for grant |  | 853,920 |  |  | 853,920 | 853,920

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- Definition Represents percent of bonus earned under the incentive plan in cash. + References No definition available. + Details
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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3255-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Net number of share options (or share units) granted during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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