Quarterly report pursuant to Section 13 or 15(d)

GUARANTORS OF SECURITIES (Condensed Statement of Comprehensive Income) (Details)

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GUARANTORS OF SECURITIES (Condensed Statement of Comprehensive Income) (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Condensed Statement of Income Captions [Line Items]        
Net income (loss) $ 31,279 $ (81,215) $ 19,406 $ (90,074)
Other comprehensive loss:        
Foreign currency translation adjustments 0 0 (5) (2)
Total other comprehensive loss 0 0 (5) (2)
Comprehensive income (loss) 31,279 (81,215) 19,401 (90,076)
Comprehensive income (loss) attributable to non-controlling interest in subsidiary 10 (233) 310 219
Comprehensive income (loss) attributable to Era Group Inc. 31,289 (81,448) 19,711 (89,857)
Reportable Legal Entities | Parent        
Condensed Statement of Income Captions [Line Items]        
Net income (loss) 31,255 (81,448) 19,682 (89,855)
Other comprehensive loss:        
Foreign currency translation adjustments     0 0
Total other comprehensive loss     0 0
Comprehensive income (loss) 31,255 (81,448) 19,682 (89,855)
Comprehensive income (loss) attributable to non-controlling interest in subsidiary 0 0 0 0
Comprehensive income (loss) attributable to Era Group Inc. 31,255 (81,448) 19,682 (89,855)
Reportable Legal Entities | Guarantors        
Condensed Statement of Income Captions [Line Items]        
Net income (loss) (897) (76,247) 9,275 (70,354)
Other comprehensive loss:        
Foreign currency translation adjustments     (5) (2)
Total other comprehensive loss     (5) (2)
Comprehensive income (loss) (897) (76,247) 9,270 (70,356)
Comprehensive income (loss) attributable to non-controlling interest in subsidiary 0 0 0 0
Comprehensive income (loss) attributable to Era Group Inc. (897) (76,247) 9,270 (70,356)
Reportable Legal Entities | Non-guarantors        
Condensed Statement of Income Captions [Line Items]        
Net income (loss) (1,859) (1,052) (5,929) (9,253)
Other comprehensive loss:        
Foreign currency translation adjustments     0 0
Total other comprehensive loss     0 0
Comprehensive income (loss) (1,859) (1,052) (5,929) (9,253)
Comprehensive income (loss) attributable to non-controlling interest in subsidiary 10 (233) 310 219
Comprehensive income (loss) attributable to Era Group Inc. (1,849) (1,285) (5,619) (9,034)
Eliminations        
Condensed Statement of Income Captions [Line Items]        
Net income (loss) 2,780 77,532 (3,622) 79,388
Other comprehensive loss:        
Foreign currency translation adjustments     0 0
Total other comprehensive loss     0 0
Comprehensive income (loss) 2,780 77,532 (3,622) 79,388
Comprehensive income (loss) attributable to non-controlling interest in subsidiary 0 0 0 0
Comprehensive income (loss) attributable to Era Group Inc. $ 2,780 $ 77,532 $ (3,622) $ 79,388