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Cash, Cash Equivalents, Marketable Securities, and Restricted Cash - Additional Information (Details) - USD ($)
6 Months Ended 12 Months Ended
Jun. 30, 2022
Dec. 31, 2021
Jun. 30, 2021
Cash, Money Market Funds, and Marketable Securities      
Cash and cash equivalents $ 235,639,000 $ 245,197,000 $ 176,538,000
Available-for-sale debt securities 151,202,000 237,299,000  
Realized gain (loss) on debt securities 0 0  
Fair value of available-for-sale debt securities in unrealized loss positions 140,500,000 $ 173,400,000  
Marketable Securities      
Cash, Money Market Funds, and Marketable Securities      
Available-for-sale debt securities $ 151,200,000