Annual report pursuant to Section 13 and 15(d)

SHARE-BASED COMPENSATION Narrative (Details)

v3.7.0.1
SHARE-BASED COMPENSATION Narrative (Details) - USD ($)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation $ 4,600,000 $ 3,700,000 $ 5,800,000  
Unrecognized compensation costs $ 4,100,000      
Unrecognized compensation cost period for recognition (in years) 1 year 6 months 21 days      
Granted (in shares) 0      
Weighted average grant-date fair value of options granted (per option) (in dollars per share) $ 0.00 $ 6.69 $ 10.86  
Aggregate intrinsic value of exercised stock options $ 0 $ 0 $ 200,000  
Weighted average remaining contractual term for vested/exercisable stock options 5 years 8 months 3 days      
Weighted average remaining contractual term for total outstanding stock options 5 years 16 days      
Aggregate intrinsic value of all outstanding stock options $ 200,000      
Aggregate intrinsic value of all vested/exercisable stock options outstanding $ 200,000      
Era Group Inc. 2012 Incentive Plan | Common Stock        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Maximum number of shares authorized       4,000,000
Shares remaining available for grant 2,747,662 3,071,335    
Era Group Inc. 2013 Employee Stock Purchase Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Maximum number of shares authorized       300,000
Shares remaining available for grant 461,811 180,641    
Percentage of stock price employees can purchase       85.00%
Offering period       6 months
Number of additional shares authorized 400,000      
Expiration period       10 years
Number of shares issued under ESPP 118,830      
Restricted Stock        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Granted (in shares) 342,913 193,668 127,050  
Granted (in dollars per share) $ 10.56 $ 20.82 $ 29.23  
Fair value of closing price on grant date $ 3,200,000 $ 1,900,000 $ 4,100,000  
Accelerated vesting of shares     $ 1,600,000