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Equity Method Investments, Investment in Datavant (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2023
Dec. 31, 2022
Mar. 31, 2023
Investments [Abstract]          
Aggregate fair value investment $ 239,927   $ 239,927   $ 304,317
Datavant Merger [Member]          
Investments [Abstract]          
Equity method investment ownership percentage 9.00%   9.00%    
Aggregate fair value investment $ 135,900   $ 135,900   $ 178,600
Unrealized gain (losses) on investments $ (28,400) $ 7,500 $ (42,600) $ (21,400)