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REVENUE - Summary of Contract Balances (Details) - USD ($)
$ in Thousands
Mar. 31, 2022
Mar. 31, 2021
Contract with Customer, Asset, after Allowance for Credit Loss [Abstract]    
Accounts receivable–billed $ 465,322 $ 375,383
Accounts receivable–unbilled (contract assets) 1,157,667 1,037,968
Allowance for credit losses 0 (1,457)
Accounts receivable, net 1,622,989 1,411,894
Accounts receivable–unbilled (contract assets) 64,339 63,869
Total accounts receivable, net 1,687,328 1,475,763
Contract with Customer, Liability [Abstract]    
Advance payments, billings in excess of costs incurred and deferred revenue (contract liabilities) $ 26,747 $ 15,906