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SUBSEQUENT EVENTS (Details)
$ in Thousands
3 Months Ended 12 Months Ended
Nov. 15, 2021
USD ($)
service
transaction
Nov. 12, 2021
USD ($)
rig
Oct. 27, 2021
USD ($)
Dec. 31, 2021
USD ($)
Sep. 30, 2021
USD ($)
service
Sep. 30, 2020
USD ($)
Sep. 30, 2019
USD ($)
Subsequent Event              
Principal payment         $ 0 $ 0 $ 12,852
Assets Related To Trucking And Casino Running Services | North America Solutions              
Subsequent Event              
Number of services offered | service         2    
Percentage of consolidated revenue         2.80%    
Unsecured Senior Notes due March 19, 2025 | Forecast              
Subsequent Event              
Make-whole premium and accrued interest       $ 58,100      
Write-off of unamortized discount and debt issuance costs       $ 3,700      
Subsequent Event              
Subsequent Event              
Litigation settlement, amount awarded from other party   $ 11,000          
Drilling service contract, number of rigs | rig   3          
Subsequent Event | Assets Related To Trucking And Casino Running Services | North America Solutions              
Subsequent Event              
Number of services offered | service 2            
Percentage of consolidated revenue 2.80%            
Number of transactions | transaction 2            
Proceeds from sale of assets $ 5,800            
Subsequent Event | Unsecured Senior Notes due March 19, 2025              
Subsequent Event              
Principal payment     $ 487,100