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REVENUE RECOGNITION - Changes in contract assets and liabilities (Details)
$ in Thousands
9 Months Ended
Jun. 30, 2022
USD ($)
Contract assets  
Opening balance $ 6,194
Additions 31,794
Deductions (20,688)
Ending balance 17,300
Contract liabilities  
Opening balance 26,614
Additions 389,849
Deductions (340,982)
Ending balance $ 75,481