XML 112 R75.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Stock Compensation Plans - Outstanding and Exercisable Stock Options (Details) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Options Exercisable      
Closing market price for common stock (in dollars per share) $ 70.43    
Intrinsic value, exercises in the period $ 1.2 $ 5.2 $ 11.5
Stock Options      
Options Vested or Expected to Vest      
Number of Options (in shares) 416,548    
Weighted- Average Remaining Contractual Life (Years) 6 years 3 months 18 days    
Weighted-Average Exercise Price (in dollars per share) $ 70.08    
Aggregate Intrinsic Value $ 3.9    
Options Exercisable      
Number of Options (in shares) 318,029    
Weighted-Average Exercise Price (in dollars per share) $ 64.36    
Aggregate Intrinsic Value $ 3.9    
$13.38 — $22.44 | Stock Options      
Exercise Price      
Exercise price, low end of range (in dollars per share) $ 13.38    
Exercise price, high end of range (in dollars per share) $ 22.44    
Options Vested or Expected to Vest      
Number of Options (in shares) 8,745    
Weighted- Average Remaining Contractual Life (Years) 9 months 18 days    
Weighted-Average Exercise Price (in dollars per share) $ 18.72    
Aggregate Intrinsic Value $ 0.4    
Options Exercisable      
Number of Options (in shares) 8,745    
Weighted-Average Exercise Price (in dollars per share) $ 18.72    
Aggregate Intrinsic Value $ 0.4    
$24.09 — $42.82 | Stock Options      
Exercise Price      
Exercise price, low end of range (in dollars per share) $ 24.09    
Exercise price, high end of range (in dollars per share) $ 42.82    
Options Vested or Expected to Vest      
Number of Options (in shares) 56,380    
Weighted- Average Remaining Contractual Life (Years) 3 years 3 months 18 days    
Weighted-Average Exercise Price (in dollars per share) $ 34.28    
Aggregate Intrinsic Value $ 2.0    
Options Exercisable      
Number of Options (in shares) 56,380    
Weighted-Average Exercise Price (in dollars per share) $ 34.28    
Aggregate Intrinsic Value $ 2.0    
$48.19 — $74.20 | Stock Options      
Exercise Price      
Exercise price, low end of range (in dollars per share) $ 48.19    
Exercise price, high end of range (in dollars per share) $ 74.20    
Options Vested or Expected to Vest      
Number of Options (in shares) 121,703    
Weighted- Average Remaining Contractual Life (Years) 5 years 9 months 18 days    
Weighted-Average Exercise Price (in dollars per share) $ 58.45    
Aggregate Intrinsic Value $ 1.5    
Options Exercisable      
Number of Options (in shares) 120,347    
Weighted-Average Exercise Price (in dollars per share) $ 58.35    
Aggregate Intrinsic Value $ 1.5    
$74.70 — $93.35 | Stock Options      
Exercise Price      
Exercise price, low end of range (in dollars per share) $ 74.70    
Exercise price, high end of range (in dollars per share) $ 93.35    
Options Vested or Expected to Vest      
Number of Options (in shares) 229,720    
Weighted- Average Remaining Contractual Life (Years) 7 years 6 months    
Weighted-Average Exercise Price (in dollars per share) $ 86.93    
Aggregate Intrinsic Value $ 0.0    
Options Exercisable      
Number of Options (in shares) 132,557    
Weighted-Average Exercise Price (in dollars per share) $ 85.35    
Aggregate Intrinsic Value $ 0.0