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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Recent Accounting Pronouncements (Details) - USD ($)
$ in Thousands
Mar. 31, 2023
Mar. 31, 2022
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Reduction to retained earnings $ 1,613,297 $ 1,443,705
Accounts receivable, net of allowance for credit losses 182,029 144,029
Unbilled work in progress, net of allowance for credit losses 115,045 104,751
Other assets 83,609 57,646
Retained earnings $ 1,033,072 $ 922,223