XML 48 R79.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Stock-Based Compensation (Stock Appreciation Rights Award Activity) (Details) - $ / shares
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
SARs, Weighted Average Exercise Price [Roll Forward]      
Cash-settled SARs, outstanding 23,833    
Stock-settled SARs, outstanding 12,160    
Stock Appreciation Rights (SARs) [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Awards, expiration period 10 years    
SARs Activity [Roll Forward]      
Outstanding, beginning 39,819 51,368 116,087
Granted 3,364 3,480 2,792
Exercised (6,790) (14,629) (67,511)
Forfeited (400) (400) 0
Outstanding, ending 35,993 39,819 51,368
Exercisable 27,781 30,285 39,769
SARs, Weighted Average Exercise Price [Roll Forward]      
Oustanding, beginning (in USD per share) $ 46.48 $ 38.55 $ 31.13
Granted (in USD per share) 102.51 89.64 83.47
Exercised (in USD per share) 42.08 28.45 27.65
Forfeited (in USD per share) 63.43 63.43 0
Oustanding, ending (in USD per share) 52.36 46.48 38.55
Exercisable (in USD per share) $ 40.73 $ 36.91 $ 30.77