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Cash, Cash Equivalents, Marketable Securities, and Restricted Cash - Cash, Cash Equivalents, And Restricted Cash (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Mar. 31, 2020
Dec. 31, 2019
Cash, Cash Equivalents, and Short-term Investments [Abstract]        
Cash and cash equivalents $ 184,833 $ 163,240 $ 123,231  
Restricted cash 3,216   2,662  
Cash, cash equivalents, and restricted cash shown in the Consolidated Statements of Cash Flows $ 188,049 $ 166,162 $ 125,893 $ 146,341