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Fair Value Measurements - Fair Value of Financial Assets and Liabilities Measured on Recurring Basis (Details) - Fair Value Measurements Recurring - USD ($)
$ in Thousands
Sep. 30, 2024
Dec. 31, 2023
Assets:    
Total $ 388,091 $ 371,498
Level 1    
Assets:    
Total 194,600 211,986
Level 2    
Assets:    
Total 193,491 159,512
Money Market Funds    
Assets:    
Total 60,363 56,397
Money Market Funds | Level 1    
Assets:    
Total 60,363 56,397
Commercial Paper    
Assets:    
Total 76,720 82,152
Commercial Paper | Level 2    
Assets:    
Total 76,720 82,152
Corporate Debt Securities    
Assets:    
Total 53,633 61,894
Corporate Debt Securities | Level 2    
Assets:    
Total 53,633 61,894
Equity Securities    
Assets:    
Total   41,937
Equity Securities | Level 1    
Assets:    
Total   41,937
Asset-backed Securities    
Assets:    
Total 58,161 10,505
Asset-backed Securities | Level 2    
Assets:    
Total 58,161 10,505
U.S. Government Securities    
Assets:    
Total 134,237 113,652
U.S. Government Securities | Level 1    
Assets:    
Total 134,237 113,652
U.S. Agency Securities    
Assets:    
Total 4,977 4,961
U.S. Agency Securities | Level 2    
Assets:    
Total $ 4,977 $ 4,961