Annual report pursuant to Section 13 and 15(d)

BUSINESS COMBINATIONS - Narrative (Details)

v3.21.1
BUSINESS COMBINATIONS - Narrative (Details)
$ / shares in Units, $ in Thousands
3 Months Ended 5 Months Ended 7 Months Ended 12 Months Ended
Jun. 11, 2020
USD ($)
director
$ / shares
Sep. 30, 2020
USD ($)
Mar. 31, 2020
USD ($)
Oct. 31, 2019
USD ($)
Mar. 31, 2021
USD ($)
Mar. 31, 2019
USD ($)
Jan. 24, 2020
$ / shares
Business Acquisition [Line Items]              
Number of directors | director 8            
Number of directors designated by Bristow | director 6            
Acquired aircraft, aggregate fair value $ 179,900            
Gain on bargain purchase   $ 5,700 $ 0 $ 0 $ 81,093 $ 0  
Era              
Business Acquisition [Line Items]              
Gain on bargain purchase $ 81,100            
Former Bristow stockholders | Combined Company Common Stock              
Business Acquisition [Line Items]              
Ownership percentage 77.00%            
Era Common Stockholders | Combined Company Common Stock              
Business Acquisition [Line Items]              
Ownership percentage 23.00%            
Era              
Business Acquisition [Line Items]              
Price per share (in USD per share) | $ / shares $ 5.16           $ 8.59