Annual report pursuant to Section 13 and 15(d)

SHARE-BASED COMPENSATION Narrative (Details)

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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