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Share and Unit-Based Plans - Narrative (Details)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended
Jun. 01, 2017
$ / shares
shares
May 30, 2017
$ / shares
shares
Mar. 03, 2017
$ / shares
shares
Jan. 01, 2017
$ / shares
shares
Jun. 30, 2017
USD ($)
Jun. 30, 2016
USD ($)
Jun. 30, 2017
USD ($)
$ / shares
shares
Jun. 30, 2016
USD ($)
Share and unit-based plans                
Capitalized share and unit-based compensation costs | $         $ 926 $ 781 $ 4,295 $ 5,740
Stock units                
Share and unit-based plans                
Conversion rate of shares             1  
Granted (in shares) | shares             85,979  
Average grant date fair value (in dollars per share)             $ 66.53  
Unrecognized compensation cost of share and unit-based plans | $         5,545   $ 5,545  
LTIP Units                
Share and unit-based plans                
Conversion rate of shares             1  
Granted (in shares) | shares             506,906  
Average grant date fair value (in dollars per share)             $ 55.33  
Risk free rate 1.45%     1.49%        
Volatility 21.40%     20.75%        
Unrecognized compensation cost of share and unit-based plans | $         10,823   $ 10,823  
LTIP Units | LTIP units that vest in equal installments over a service period ending December 31, 2016                
Share and unit-based plans                
Granted (in shares) | shares 1,522     66,079        
Average grant date fair value (in dollars per share) $ 58.31     $ 70.84        
LTIP Units | Market-Indexed LTIP units that vest in equal installments over a service period ending December 31, 2016                
Share and unit-based plans                
Granted (in shares) | shares 6,714     297,849        
Average grant date fair value (in dollars per share) $ 39.66     $ 47.15        
LTIP Units | LTIP units that are fully vested on the grant date                
Share and unit-based plans                
Granted (in shares) | shares     134,742          
Average grant date fair value (in dollars per share)     $ 66.57          
Non-qualified stock options                
Share and unit-based plans                
Granted (in shares) | shares   25,000            
Average grant date fair value (in dollars per share)   $ 10.02            
Risk free rate   2.08%            
Volatility   30.19%            
Dividend yield   4.93%            
Current value (in dollars per share)   $ 57.55            
Expected term   8 years            
Stock options                
Share and unit-based plans                
Unrecognized compensation cost of share and unit-based plans | $         242   $ 242  
Phantom stock units                
Share and unit-based plans                
Granted (in shares) | shares             6,772  
Average grant date fair value (in dollars per share)             $ 71.73  
Unrecognized compensation cost of share and unit-based plans | $         $ 560   $ 560