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Issuances of Common Stock - Issuance of Common Stock in Underwritten Public Offering (Details) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended
Jan. 31, 2021
Mar. 31, 2020
Mar. 31, 2021
Mar. 31, 2020
Class of Stock [Line Items]        
Proceeds from share issuances, net     $ 669,590 $ 728,883
Common stock | Underwritten Public Offering        
Class of Stock [Line Items]        
Shares of common stock issued (in shares) 12,075,000 9,690,500    
Underwriting discounts and other offering costs $ 19,300 $ 21,200    
Proceeds from share issuances, net $ 669,600 $ 728,900    
Common stock | Underwriter Option        
Class of Stock [Line Items]        
Shares of common stock issued (in shares) 1,575,000 690,500