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Fair Value Measurements - Assets and Liabilities at Fair Value (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Mar. 31, 2023
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents and marketable securities $ 595,575  
Cash and Cash Equivalents    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents and marketable securities 76,063  
Marketable Securities    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents and marketable securities 587,149 $ 682,972
Commercial paper | Cash and Cash Equivalents    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents and marketable securities 8,426  
Asset-backed securities | Marketable Securities    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents and marketable securities 4,520 7,200
Certificates of deposit | Marketable Securities    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents and marketable securities 11,682 27,300
Commercial paper | Marketable Securities    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents and marketable securities 56,930 78,489
Corporate notes and bonds | Marketable Securities    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents and marketable securities 144,382 118,512
Sovereign bonds | Marketable Securities    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents and marketable securities 7,587 7,384
U.S. government and agency securities | Marketable Securities    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents and marketable securities 362,048 444,087
Fair Value, Recurring    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents and marketable securities 663,212 809,247
Liabilities:    
Contingent earn-out consideration liability 16,630 21,862
Total contingent earn-out consideration liability 16,630 21,862
Fair Value, Recurring | Cash and Cash Equivalents    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents and marketable securities 76,063 126,275
Fair Value, Recurring | Marketable Securities    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents and marketable securities 587,149 682,972
Fair Value, Recurring | Commercial paper | Cash and Cash Equivalents    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents and marketable securities 8,426  
Fair Value, Recurring | Money market funds | Cash and Cash Equivalents    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents and marketable securities 67,637 126,275
Fair Value, Recurring | Asset-backed securities | Marketable Securities    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents and marketable securities 4,520 7,200
Fair Value, Recurring | Certificates of deposit | Marketable Securities    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents and marketable securities 11,682 27,300
Fair Value, Recurring | Commercial paper | Marketable Securities    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents and marketable securities 56,930 78,489
Fair Value, Recurring | Corporate notes and bonds | Marketable Securities    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents and marketable securities 144,382 118,512
Fair Value, Recurring | Sovereign bonds | Marketable Securities    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents and marketable securities 7,587 7,384
Fair Value, Recurring | U.S. government and agency securities | Marketable Securities    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents and marketable securities 362,048 444,087
Level 1 | Fair Value, Recurring    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents and marketable securities 415,250 566,023
Liabilities:    
Contingent earn-out consideration liability 0 0
Total contingent earn-out consideration liability 0 0
Level 1 | Fair Value, Recurring | Cash and Cash Equivalents    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents and marketable securities 67,637 126,275
Level 1 | Fair Value, Recurring | Marketable Securities    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents and marketable securities 347,613 439,748
Level 1 | Fair Value, Recurring | Commercial paper | Cash and Cash Equivalents    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents and marketable securities 0  
Level 1 | Fair Value, Recurring | Money market funds | Cash and Cash Equivalents    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents and marketable securities 67,637 126,275
Level 1 | Fair Value, Recurring | Asset-backed securities | Marketable Securities    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents and marketable securities 0 0
Level 1 | Fair Value, Recurring | Certificates of deposit | Marketable Securities    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents and marketable securities 0 0
Level 1 | Fair Value, Recurring | Commercial paper | Marketable Securities    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents and marketable securities 0 0
Level 1 | Fair Value, Recurring | Corporate notes and bonds | Marketable Securities    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents and marketable securities 0 0
Level 1 | Fair Value, Recurring | Sovereign bonds | Marketable Securities    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents and marketable securities 0 0
Level 1 | Fair Value, Recurring | U.S. government and agency securities | Marketable Securities    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents and marketable securities 347,613 439,748
Level 2 | Fair Value, Recurring    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents and marketable securities 247,962 243,224
Liabilities:    
Contingent earn-out consideration liability 0 0
Total contingent earn-out consideration liability 0 0
Level 2 | Fair Value, Recurring | Cash and Cash Equivalents    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents and marketable securities 8,426 0
Level 2 | Fair Value, Recurring | Marketable Securities    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents and marketable securities 239,536 243,224
Level 2 | Fair Value, Recurring | Commercial paper | Cash and Cash Equivalents    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents and marketable securities 8,426  
Level 2 | Fair Value, Recurring | Money market funds | Cash and Cash Equivalents    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents and marketable securities 0 0
Level 2 | Fair Value, Recurring | Asset-backed securities | Marketable Securities    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents and marketable securities 4,520 7,200
Level 2 | Fair Value, Recurring | Certificates of deposit | Marketable Securities    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents and marketable securities 11,682 27,300
Level 2 | Fair Value, Recurring | Commercial paper | Marketable Securities    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents and marketable securities 56,930 78,489
Level 2 | Fair Value, Recurring | Corporate notes and bonds | Marketable Securities    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents and marketable securities 144,382 118,512
Level 2 | Fair Value, Recurring | Sovereign bonds | Marketable Securities    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents and marketable securities 7,587 7,384
Level 2 | Fair Value, Recurring | U.S. government and agency securities | Marketable Securities    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents and marketable securities 14,435 4,339
Level 3 | Fair Value, Recurring    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents and marketable securities 0 0
Liabilities:    
Contingent earn-out consideration liability 16,630 21,862
Total contingent earn-out consideration liability 16,630 21,862
Level 3 | Fair Value, Recurring | Cash and Cash Equivalents    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents and marketable securities 0 0
Level 3 | Fair Value, Recurring | Marketable Securities    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents and marketable securities 0 0
Level 3 | Fair Value, Recurring | Commercial paper | Cash and Cash Equivalents    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents and marketable securities 0  
Level 3 | Fair Value, Recurring | Money market funds | Cash and Cash Equivalents    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents and marketable securities 0 0
Level 3 | Fair Value, Recurring | Asset-backed securities | Marketable Securities    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents and marketable securities 0 0
Level 3 | Fair Value, Recurring | Certificates of deposit | Marketable Securities    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents and marketable securities 0 0
Level 3 | Fair Value, Recurring | Commercial paper | Marketable Securities    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents and marketable securities 0 0
Level 3 | Fair Value, Recurring | Corporate notes and bonds | Marketable Securities    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents and marketable securities 0 0
Level 3 | Fair Value, Recurring | Sovereign bonds | Marketable Securities    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents and marketable securities 0 0
Level 3 | Fair Value, Recurring | U.S. government and agency securities | Marketable Securities    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents and marketable securities $ 0 $ 0