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Stockholders' Equity - Narrative (Details)
$ / shares in Units, $ in Millions
 1 Months Ended 3 Months Ended 12 Months Ended
Jul. 30, 2021
Mar. 31, 2022
USD ($)
director
quarter
seriesOfPreferredStock
$ / shares
shares
Mar. 31, 2021
shares
Dec. 31, 2021
$ / shares
shares
Feb. 28, 2022
USD ($)
Aug. 10, 2021
USD ($)
$ / shares
Nov. 27, 2019
USD ($)
Mar. 29, 2019
USD ($)
Aug. 10, 2017
USD ($)
Class of Stock [Line Items]                  
Number of series of cumulative redeemable preferred stock outstanding | seriesOfPreferredStock   4              
Redemption price (in dollars per share) | $ / shares   $ 25.00              
Preferred stock redemption period   120 days              
Number of elected directors pending preferred stock voting rights | director   2              
Common stock, shares authorized (in shares)   800,000,000   800,000,000          
Common stock, par value (in usd per share) | $ / shares   $ 0.01   $ 0.01          
Common stock, shares, issued (in shares)   381,249,031   379,405,240          
Common stock, shares outstanding (in shares)   381,249,031   379,405,240          
Stock repurchase program, authorized amount | $         $ 200.0        
Percent of outstanding shares affirmative votes needed for material and adverse changes to preferred stock terms   66.67%              
Equity Distribution Agreements                  
Class of Stock [Line Items]                  
Common stock, par value (in usd per share) | $ / shares           $ 0.01      
Common stock that may be sold (up to) | $           $ 100.0      
Common stock reserved for issuance | $   $ 100.0             $ 72.5
Shares issued (in shares)   0 0            
Equity agreement for preferred stock maximum aggregate sales price (up to) | $           $ 149.1 $ 131.5    
Preferred Equity Distribution Agreement                  
Class of Stock [Line Items]                  
Shares issued (in shares)   0 0            
Equity agreement for preferred stock maximum aggregate sales price (up to) | $               $ 50.0  
Preferred stock available for future issuance, value | $   $ 100.0              
Preferred Stock                  
Class of Stock [Line Items]                  
Preferred stock, shares authorized (in shares)   200,000,000   200,000,000          
Preferred stock, par value (in usd per share) | $ / shares   $ 0.01   $ 0.01          
Preferred stock, shares issued (in shares)   22,284,994   22,284,994          
Preferred stock, shares outstanding (in shares)   22,284,994   22,284,994          
Number of quarters with no dividends that results in voting rights | quarter   6              
Series D Preferred Stock                  
Class of Stock [Line Items]                  
Preferred stock, shares authorized (in shares)   8,400,000   8,400,000          
Preferred stock, shares issued (in shares)   6,123,495   6,123,495          
Preferred stock, shares outstanding (in shares)   6,123,495   6,123,495          
Preferred stock, cumulative redeemable dividend rate   8.00%   8.00%          
Series E Preferred Stock                  
Class of Stock [Line Items]                  
Preferred stock, shares authorized (in shares)   9,900,000   9,900,000          
Preferred stock, shares issued (in shares)   7,411,499   7,411,499          
Preferred stock, shares outstanding (in shares)   7,411,499   7,411,499          
Preferred stock, cumulative redeemable dividend rate   7.875%   7.875%          
Series F Preferred Stock                  
Class of Stock [Line Items]                  
Preferred stock, shares authorized (in shares)   7,750,000   7,750,000          
Preferred stock, shares issued (in shares)   5,750,000   5,750,000          
Preferred stock, shares outstanding (in shares)   5,750,000   5,750,000          
Preferred stock, cumulative redeemable dividend rate 6.875% 6.875%   6.875%