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Stockholders' Equity of the Company (Details) - USD ($)
9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Jun. 30, 2018
Class of Stock [Line Items]        
At the market stock offering aggregate gross sales price of common stock       $ 500,000,000
Common stock, shares issued (in shares) 116,461,683   116,035,827  
Proceeds from issuance of stock $ 0 $ 721,675,000    
Common Stock [Member] | Forward equity sale [Member]        
Class of Stock [Line Items]        
Common stock, shares issued (in shares) 3,594,576      
At the market stock offering remaining amount available for issuance $ 214,200,000      
Proceeds from issuance of stock $ 0