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SHARE-BASED COMPENSATION Narrative (Details) - USD ($) $ / shares in Units, $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Common stock, par value (in dollars per share) | $ 0.01 | $ 0.01 |  |  |
Share-based compensation | $ 3.6 | $ 2.9 | $ 4.6 |  |
Unrecognized compensation costs | $ 4.2 |  |  |  |
Unrecognized compensation cost period for recognition | 1 year 9 months 18 days |  |  |  |
Options outstanding (in shares) | 203,612 |  |  |  |
Fair value assumptions, exercise price | $ 19.62 |  |  |  |
Options granted (in shares) | 0 | 0 |  |  |
Weighted average contractual term | 3 years 2 months 12 days |  |  |  |
Era Group Inc. 2012 Incentive Plan | Common Stock |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Maximum number of shares authorized (in shares) |  |  |  |  | 4,000,000
Shares remaining available for grant (in shares) | 1,839,835 | 2,235,379 |  |  |
Era Group Inc. 2013 Employee Stock Purchase Plan |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Maximum number of shares authorized (in shares) |  |  |  |  | 300,000
Shares remaining available for grant (in shares) | 101,624 | 222,378 |  |  |
Percentage of stock price employees can purchase |  |  |  |  | 85.00%
Offering period |  |  |  |  | 6 months
Number of additional shares authorized for issuance(in shares) |  |  |  | 400,000 |
Expiration period |  |  |  |  | 10 years
Number of shares issued under ESPP | 120,754 |  |  |  |
Restricted Stock |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Shares granted (in shares) | 395,544 | 331,869 | 297,256 |  |
Weighted average grant date fair value (in dollars per share) | $ 10.35 | $ 9.80 | $ 11.44 |  |
Fair value of closing price on grant date | $ 2.9 | $ 2.8 | $ 5.5 |  |

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