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Stockholders' Equity - At-the-Market equity offering - Additional Information (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2021
Sep. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Net proceeds   $ 105,615 $ 306,779
ATM Offering      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Issuance of common stock (in shares) 577,956    
Gross proceeds $ 107,600    
Net proceeds 105,600    
Commissions 1,600    
Stock issuance costs $ 300    
Maximum number of common stock to be sold 3,000,000.0