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Stock-Based Compensation (Narrative) (Details) $ in Thousands | 3 Months Ended
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Mar. 31, 2022 USD ($) director shares | Mar. 31, 2021 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Stock based compensation expense | $ 547 | $ 397
Stock-based compensation tax benefit | 126 | $ 91
Non-Employee Director Awards |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Director equity grants granted, value | $ 32 |
Number of directors | director | 13 |
Long-Term Restricted Stock Awards |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Unrecognized compensation expense | $ 4,200 |
Unrecognized compensation expense, period for recognition | 2 years 3 months 18 days |
Long-Term Restricted Stock Awards | Next Twelve Months |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Unrecognized compensation expense | $ 2,100 |
Long-Term Restricted Stock Awards | Remaining Quarters of 2022 |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Unrecognized compensation expense | $ 1,600 |
First Bancorp 2014 Equity Plan |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Shares remaining available for grant | shares | 431,852 |

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