XML 130 R115.htm IDEA: XBRL DOCUMENT v3.20.4
Stockholders’ Equity - Equity Distribution Agreements (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Nov. 27, 2019
Mar. 29, 2019
Sep. 10, 2018
Aug. 10, 2017
Class of Stock [Line Items]              
Common stock, par value (in dollars per share) $ 0.01 $ 0.01          
Stock issued (in shares) 30,900,000            
Proceeds from issuance of common stock $ 511,924 $ 804,398 $ 260,091        
Equity Distribution Agreements              
Class of Stock [Line Items]              
Common stock, par value (in dollars per share)             $ 0.01
Common stock subscriptions (up to)           $ 177,100 $ 100,000
Stock issued (in shares) 0 2,260,200 14,588,631        
Sale of stock, Price per share (in dollars per share)   $ 6.12          
Proceeds from issuance of common stock   $ 13,600 $ 89,000        
Common stock reserved for future issuance $ 72,500            
Preferred Stock, value, subscriptions (up to)       $ 131,500      
Equity Distribution Agreements | Minimum              
Class of Stock [Line Items]              
Sale of stock, Price per share (in dollars per share)     $ 6.19        
Preferred Equity Distribution Agreement              
Class of Stock [Line Items]              
Stock issued (in shares) 0 1,972,888          
Preferred Stock, value, subscriptions (up to)         $ 50,000    
Preferred Equity Distribution Agreement | Minimum              
Class of Stock [Line Items]              
Sale of stock, Price per share (in dollars per share)   $ 24.88