Annual report pursuant to Section 13 and 15(d)

Mandatorily-Redeemable Preferred Stock (Detail)

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Mandatorily-Redeemable Preferred Stock (Detail) - USD ($)
$ / shares in Units, $ in Thousands
 1 Months Ended 3 Months Ended 12 Months Ended 33 Months Ended
Feb. 12, 2021
Jan. 13, 2021
Jan. 31, 2021
Aug. 31, 2016
Mar. 31, 2021
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2022
Sale of Stock [Line Items]                  
Proceeds from issuance of preferred and common equity           $ 188,106 $ 233,393 $ 130,348 $ 267,800
Write-off of costs associated with offering of Series C cumulative redeemable preferred stock           853 0 0  
Payments of legal costs           13,751 6,660 6,620  
Series A Preferred Stock                  
Sale of Stock [Line Items]                  
Preferred stock, dividend rate       6.375%          
Preferred stock, par value (in dollars per share)       $ 0.001          
Preferred stock, shares issued (in shares)       1,150,000          
Redemption price of redeemable preferred stock (in dollars per share) $ 25.00                
Redemption of preferred stock $ 28,800         $ 0 $ 28,750 $ 0  
Series A Preferred Stock | Preferred Stock                  
Sale of Stock [Line Items]                  
Shares issued (in dollars per share)       $ 25.00          
Proceeds from issuance of mandatorily-redeemable preferred stock       $ 28,800          
Proceeds from issuance of preferred and common equity       $ 27,600          
Write-off of costs associated with offering of Series C cumulative redeemable preferred stock         $ 127        
Series D Preferred Stock                  
Sale of Stock [Line Items]                  
Preferred stock, dividend rate     5.00%            
Preferred stock, par value (in dollars per share)     $ 0.001     $ 0.001 $ 0.001   $ 0.001
Preferred stock, shares issued (in shares)     2,415,000     2,415,000 2,415,000   2,415,000
Payments of legal costs     $ 2,100            
Series D Preferred Stock | Preferred Stock                  
Sale of Stock [Line Items]                  
Preferred stock, dividend rate   5.00%              
Shares issued (in dollars per share)     $ 25.00            
Proceeds from issuance of mandatorily-redeemable preferred stock     $ 60,400     $ 56,500      
Proceeds from issuance of preferred and common equity     $ 58,300            
Redemption price of redeemable preferred stock (in dollars per share)     $ 25.00            
Series D Preferred Stock | Preferred Stock | Fair Value, Inputs, Level 1                  
Sale of Stock [Line Items]                  
Shares issued (in dollars per share)           $ 23.41     $ 23.41