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Share and Unit-Based Plans - Narrative (Details)
$ in Thousands
3 Months Ended
Jan. 01, 2019
Mar. 31, 2019
USD ($)
Mar. 31, 2018
USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Capitalized share and unit-based compensation costs   $ 1,146 $ 2,609
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   $ 2,921  
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   $ 9,050  
Market-indexed      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Risk free interest rate 2.46%    
Volatility 23.52%    
Phantom stock units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Unrecognized compensation cost of share and unit-based plans   $ 611