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REVENUE FROM CONTRACTS WITH CUSTOMERS - Contract Assets and Contract Liabilities (Details) - USD ($)
$ in Thousands
3 Months Ended
Dec. 31, 2022
Sep. 30, 2022
Contract assets    
Trade receivables $ 65,555 $ 88,867
Unbilled revenue 16,324 17,474
Contract liabilities    
Customer deposits 30,509 39,222
Deferred revenue $ 30,146 $ 29,420
Percentage of revenue billed from unbilled revenue 45.00%  
Percentage of contract liabilities recognized as revenue 30.00%