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 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Condensed Statement of Income Captions [Line Items]        
Net income (loss) $ (10,516) $ (3,072) $ (11,873) $ (8,859)
Other comprehensive loss:        
Foreign currency translation adjustments 0 0 (5) (2)
Total other comprehensive loss 0 0 (5) (2)
Comprehensive income (loss) (10,516) (3,072) (11,878) (8,861)
Comprehensive income (loss) attributable to non-controlling interest in subsidiary 137 285 300 452
Comprehensive income (loss) attributable to Era Group Inc. (10,379) (2,787) (11,578) (8,409)
Reportable Legal Entities | Parent        
Condensed Statement of Income Captions [Line Items]        
Net income (loss) (10,379) (2,787) (11,573) (8,407)
Other comprehensive loss:        
Foreign currency translation adjustments     0 0
Total other comprehensive loss     0 0
Comprehensive income (loss) (10,379) (2,787) (11,573) (8,407)
Comprehensive income (loss) attributable to non-controlling interest in subsidiary 0 0 0 0
Comprehensive income (loss) attributable to Era Group Inc. (10,379) (2,787) (11,573) (8,407)
Reportable Legal Entities | Guarantors        
Condensed Statement of Income Captions [Line Items]        
Net income (loss) 2,574 4,920 10,172 5,893
Other comprehensive loss:        
Foreign currency translation adjustments     (5) (2)
Total other comprehensive loss     (5) (2)
Comprehensive income (loss) 2,574 4,920 10,167 5,891
Comprehensive income (loss) attributable to non-controlling interest in subsidiary 0 0 0 0
Comprehensive income (loss) attributable to Era Group Inc. 2,574 4,920 10,167 5,891
Reportable Legal Entities | Non-guarantors        
Condensed Statement of Income Captions [Line Items]        
Net income (loss) (2,136) (4,625) (4,070) (8,201)
Other comprehensive loss:        
Foreign currency translation adjustments     0 0
Total other comprehensive loss     0 0
Comprehensive income (loss) (2,136) (4,625) (4,070) (8,201)
Comprehensive income (loss) attributable to non-controlling interest in subsidiary 137 285 300 452
Comprehensive income (loss) attributable to Era Group Inc. (1,999) (4,340) (3,770) (7,749)
Eliminations        
Condensed Statement of Income Captions [Line Items]        
Net income (loss) (575) (580) (6,402) 1,856
Other comprehensive loss:        
Foreign currency translation adjustments     0 0
Total other comprehensive loss     0 0
Comprehensive income (loss) (575) (580) (6,402) 1,856
Comprehensive income (loss) attributable to non-controlling interest in subsidiary 0 0 0 0
Comprehensive income (loss) attributable to Era Group Inc. $ (575) $ (580) $ (6,402) $ 1,856