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Share and Unit-Based Plans - Narrative (Details)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 01, 2019
Jan. 01, 2019
Sep. 30, 2019
USD ($)
Sep. 30, 2018
USD ($)
Sep. 30, 2019
USD ($)
Sep. 30, 2018
USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Capitalized share and unit-based compensation costs     $ 993 $ 1,062 $ 3,598 $ 5,575
Stock Units            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Conversion rate of shares         1  
Unrecognized compensation cost of share and unit-based plans     3,657   $ 3,657  
LTIP Units            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Conversion rate of shares         1  
Unrecognized compensation cost of share and unit-based plans     4,159   $ 4,159  
Market-indexed | 1/1/2019            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Risk free interest rate   2.46%        
Volatility   23.52%        
Market-indexed | 9/1/2019            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Risk free interest rate 1.42%          
Volatility 24.91%          
Phantom Stock Units            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Unrecognized compensation cost of share and unit-based plans     $ 351   $ 351