XML 75 R64.htm IDEA: XBRL DOCUMENT v3.8.0.1
Share and Unit-Based Plans - Narrative (Details)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended
Jun. 01, 2017
$ / shares
shares
May 30, 2017
$ / shares
shares
Mar. 03, 2017
$ / shares
shares
Jan. 01, 2017
$ / shares
shares
Sep. 30, 2017
USD ($)
Sep. 30, 2016
USD ($)
Sep. 30, 2017
USD ($)
$ / shares
shares
Sep. 30, 2016
USD ($)
Share and unit-based plans                
Capitalized share and unit-based compensation costs | $         $ 983 $ 750 $ 5,278 $ 6,490
Stock units                
Share and unit-based plans                
Conversion rate of shares             1  
Granted (in shares) | shares             86,426  
Average grant date fair value (in dollars per share)             $ 66.47  
Unrecognized compensation cost of share and unit-based plans | $         4,338   $ 4,338  
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 | $         5,554   $ 5,554  
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 | $         208   $ 208  
Phantom stock units                
Share and unit-based plans                
Granted (in shares) | shares             8,439  
Average grant date fair value (in dollars per share)             $ 68.34  
Unrecognized compensation cost of share and unit-based plans | $         $ 466   $ 466