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Stockholders' Equity (Narrative) (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Class of Stock [Line Items]        
Maximum number of shares available for repurchase during any calendar year, as percentage of common stock outstanding at end of prior year     5.00%  
Period of notice required for changes to share repurchase program     30 days  
Common Stock        
Class of Stock [Line Items]        
Repurchase of common stock (in shares) 225,136 303,247 786,861 772,581
Repurchase of common stock $ 2 $ 3 $ 8 $ 7
Class A, I and T Shares | Common Stock        
Class of Stock [Line Items]        
Repurchase of common stock (in shares)     786,861 772,581
Repurchase of common stock     $ 6,452 $ 6,564
Repurchase of common stock, average price per share (in dollars per share)     $ 8.20 $ 8.50
Class A | Common Stock        
Class of Stock [Line Items]        
Repurchase of common stock (in shares)     690,494 715,406
Class I | Common Stock        
Class of Stock [Line Items]        
Repurchase of common stock (in shares)     20,905 8,322
Class T | Common Stock        
Class of Stock [Line Items]        
Repurchase of common stock (in shares)     75,462 48,853