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Noncontrolling Interest Represented By Preferred Operating Partnership Units (Details) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 12 Months Ended
Apr. 25, 2019
Apr. 17, 2019
Dec. 01, 2018
Apr. 18, 2017
Jun. 25, 2007
Dec. 31, 2014
Oct. 31, 2014
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Jun. 30, 2007
Noncontrolling Interest [Line Items]                      
Loan to holders of preferred OP units               $ 100,000 $ 100,000    
Redemption of noncontrolling interests               $ 0 0 $ 0  
Redemption of units for cash                      
Noncontrolling Interest [Line Items]                      
Redemption of noncontrolling interests                   2,558  
Series B Units | Redemption of units for cash                      
Noncontrolling Interest [Line Items]                      
Redemption of noncontrolling interests (in shares)               40,000      
Redemption of noncontrolling interests               $ 1,000      
Operating Partnership                      
Noncontrolling Interest [Line Items]                      
Conversion of units, units issued upon conversion (in shares) 270,709   373,113                
Reduction of noncontrolling interest for note receivable               2,311 $ 18,524 11,091  
Operating Partnership | Redemption of units for cash                      
Noncontrolling Interest [Line Items]                      
Redemption of noncontrolling interests                   1,126  
Series A Units                      
Noncontrolling Interest [Line Items]                      
Fixed priority return on preferred OP units, amount             $ 101,700 $ 101,700      
Fixed priority return on preferred OP units, stated return rate   5.00%   2.30%       2.30%      
Fixed priority return on preferred OP units, liquidation value                     $ 115,000
Preferred units outstanding (in shares)             875,480        
Series A Units | Holders Of Series A Preferred Operating Partnership Units                      
Noncontrolling Interest [Line Items]                      
Loan to holders of preferred OP units         $ 100,000            
Maximum number of preferred OP units converted prior to the maturity date of the loan (in shares)             114,500        
Note receivable interest rate         4.90%     2.10%      
Additional units redeemed (in shares)         0            
Series B Units                      
Noncontrolling Interest [Line Items]                      
Preferred units outstanding (in shares)               1,636,087      
Liquidation value (in dollars per share)               $ 25.00      
Fixed liquidation value               $ 40,902      
Annual rate of return percent               6.00%      
Series C Units                      
Noncontrolling Interest [Line Items]                      
Loan to holders of preferred OP units                   19,735  
Note receivable interest rate           5.00%          
Liquidation value (in dollars per share)               $ 42.10      
Quarterly distribution per preferred OP unit payable above quarterly distribution for common OP Unit (in dollars per share)               $ 0.18      
Period from date of issuance after which preferred OP units will become redeemable at the option of the holder               1 year      
Period from date of issuance after which preferred OP units will become convertible into common OP units at the option of the holder               1 year      
Preferred OP units conversion ratio (in units)               0.9145      
Notes receivable           $ 20,230          
Conversion of units, units converted (in shares) 296,020   407,996                
Reduction of noncontrolling interest for note receivable                   $ 8,644  
Series D Units                      
Noncontrolling Interest [Line Items]                      
Preferred units outstanding (in shares)               4,694,485      
Liquidation value (in dollars per share)               $ 25.00      
Fixed liquidation value               $ 117,362      
Number of units issued (in shares)                 1,120,924    
Value of units issued                 $ 28,022    
Series D Units | Minimum                      
Noncontrolling Interest [Line Items]                      
Annual rate of return percent               3.00%      
Series D Units | Maximum                      
Noncontrolling Interest [Line Items]                      
Annual rate of return percent               5.00%