XML 112 R97.htm IDEA: XBRL DOCUMENT v3.8.0.1
Stock-Based Compensation - Stock Appreciation RIghts (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Weighted Average Exercise Price (USD per share)        
OUTSTANDING AT DECEMBER 31, 2016 (USD per share) $ 104.93 $ 87.61    
Weighted average fair value (USD per share) 118.55 105.48 $ 97.48 $ 106.44
OUTSTANDING AT DECEMBER 31, 2017 (USD per Share) $ 119.88 $ 104.93 $ 87.61  
Stock Appreciation Rights SARS        
Number of Rights        
OUTSTANDING AT DECEMBER 31, 2016 (shares) 1,811      
Shares granted (shares) 432      
Exercised (shares) (191)      
Shares forfeited (shares) (9)      
Canceled (shares) (1)      
OUTSTANDING AT DECEMBER 31, 2017 (shares) 2,042 1,811    
EXERCISABLE AT DECEMBER 31, 2016 (shares) 1,241      
Weighted Average Exercise Price (USD per share)        
OUTSTANDING AT DECEMBER 31, 2016 (USD per share) $ 94.51      
Weighted average fair value (USD per share) 127.28      
Exercised (USD per share) 70.78      
Forfeited (USD per share) 107.39      
Canceled (USD per share) 97.48      
OUTSTANDING AT DECEMBER 31, 2017 (USD per Share) 103.59 $ 94.51    
Options, exercisable, weighted average exercise price (USD per share) $ 93.89      
Weighted average remaining contractual term, outstanding share 7 years 4 months 24 days      
Weighted average remaining contractual term, exercisable 6 years 2 months 12 days      
Aggregate intrinsic value, outstanding $ 64,841      
Aggregate intrinsic value, exercisable $ 51,420