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EARNINGS (LOSS) PER COMMON SHARE (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |
Net income (loss) attributable to Era Group Inc. |  | $ (2,787) | $ 1,938 | $ (8,407) | $ (1,880)
Net income attributable to participating securities |  | 0 | 48 | 0 | 0
Net income (loss) attributable to fully vested common stock |  | $ (2,787) | $ 1,890 | $ (8,407) | $ (1,880)
Weighted average common shares outstanding - basic (in shares) |  | 20,789,537 | 20,361,533 | 20,650,274 | 20,290,735
Weighted average common shares outstanding - diluted (in shares) |  | 20,789,537 | 20,364,382 | 20,650,274 | 20,290,735
Income (loss) per common share: |  |  |  |  |
Basic (in dollars per share) |  | $ (0.13) | $ 0.09 | $ (0.41) | $ (0.09)
Diluted (in dollars per share) |  | $ (0.13) | $ 0.09 | $ (0.41) | $ (0.09)
Stock Options and Restricted Stock |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |
Net effect of dilutive stock options and restricted stock awards based on the treasury stock method (in shares) | [1] | 0 | 2,849 | 0 | 0
Income (loss) per common share: |  |  |  |  |
Unvested restricted common shares (in shares) |  | 275,851 | 283,764 | 280,199 | 292,840
[1] | Excludes weighted average common shares of 275,851 and 283,764 for the three months ended June 30, 2017 and 2016, respectively, and 280,199 and 292,840 for the six months ended June 30, 2017 and 2016, respectively, for certain share awards as the effect of their inclusion would have been antidilutive.

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