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Shareholders' Equity, Noncontrolling Interests and Other Comprehensive Loss - Preferred OP Units - Additional Information (Details) - $ / shares
 3 Months Ended 12 Months Ended 51 Months Ended 255 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Dec. 31, 2016
Dec. 31, 1999
Mar. 31, 2020
Mar. 31, 2020
Class Of Stock [Line Items]              
Denominator for Series A Preferred OP Unit conversion $ 7.50         $ 7.50 $ 7.50
Common Shares              
Class Of Stock [Line Items]              
Issuance of common shares, net of issuance costs (in Shares)   971,000          
Gotham Plaza | Common Shares              
Class Of Stock [Line Items]              
Issuance of common shares, net of issuance costs (in Shares)       442,478      
Preferred quarterly distribution per share price       $ 0.9375      
Number of convertible units if share price below $28.80 (in shares)       3.4722      
Number of convertible units if share price above $35.20 (in shares)       2.8409      
Operating Partnership, as General Partner or Managing Member              
Class Of Stock [Line Items]              
Series A Preferred OP Units (in shares) 3,205,931 3,325,240       3,205,931 3,205,931
Preferred OP Units              
Class Of Stock [Line Items]              
Issuance of common shares, net of issuance costs (in Shares) 0   0        
Preferred OP Units | Gotham Plaza              
Class Of Stock [Line Items]              
Issuance of common shares, net of issuance costs (in Shares)       141,593      
Share price (in dollars per share)       $ 100.00      
Preferred OP Units | Gotham Plaza | Minimum              
Class Of Stock [Line Items]              
Share price at conversion date       28.80      
Preferred OP Units | Gotham Plaza | Maximum              
Class Of Stock [Line Items]              
Share price at conversion date       $ 35.20      
Series A Preferred Stock              
Class Of Stock [Line Items]              
Issuance of common shares, net of issuance costs (in Shares)         1,580    
Preferred stock, stated value per unit $ 1,000         $ 1,000 $ 1,000
Per unit conversion amount, Series A Preferred OP Units (in dollars per unit) $ 22.50         $ 22.50 $ 22.50
Per unit conversion annual rate, Preferred OP Units 9.00%         9.00% 9.00%
Number of preferred OP Units converted (in shares)             1,392
Units converted from Preferred OP Units (in shares)             185,600
Series A Preferred Stock | Operating Partnership, as General Partner or Managing Member              
Class Of Stock [Line Items]              
Series A Preferred OP Units (in shares) 188 188       188 188
Series C Preferred Stock | Gotham Plaza              
Class Of Stock [Line Items]              
Number of preferred OP Units converted (in shares)           15,000  
Units converted from Preferred OP Units (in shares)           51,887  
Series C Preferred Stock | Operating Partnership, as General Partner or Managing Member              
Class Of Stock [Line Items]              
Series A Preferred OP Units (in shares) 126,593 136,593       126,593 126,593