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Stock-Based Compensation - Option Summary (Details)
12 Months Ended
Dec. 31, 2016
$ / shares
shares
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]  
Number of Outstanding Options, Exercise Price Range | shares 117,220
Weighted Average Contractual Life, Outstanding Options, Exercise Price Range 5 years 6 months
Weighted Average Exercise Price, Outstanding Options, Exercise Price Range $ 75.34
Number of Exercisable Options, Exercise Price Range | shares 14,180
Weighted Average Exercise Price, Exercisable Options, Exercise Price Range $ 71.87
$30.01 - $40.00  
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]  
Exercise Price Range, Lower Range Limit 30.01
Exercise Price Range, Upper Range Limit $ 40
Number of Outstanding Options, Exercise Price Range | shares 552
Weighted Average Contractual Life, Outstanding Options, Exercise Price Range 2 years 2 months
Weighted Average Exercise Price, Outstanding Options, Exercise Price Range $ 38.13
Number of Exercisable Options, Exercise Price Range | shares 552
Weighted Average Exercise Price, Exercisable Options, Exercise Price Range $ 38.13
$40.01 - $50.00  
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]  
Exercise Price Range, Lower Range Limit 40.01
Exercise Price Range, Upper Range Limit $ 50
Number of Outstanding Options, Exercise Price Range | shares 0
Weighted Average Contractual Life, Outstanding Options, Exercise Price Range 0 years
Weighted Average Exercise Price, Outstanding Options, Exercise Price Range $ 0
Number of Exercisable Options, Exercise Price Range | shares 0
Weighted Average Exercise Price, Exercisable Options, Exercise Price Range $ 0
$50.01 - $60.00  
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]  
Exercise Price Range, Lower Range Limit 50.01
Exercise Price Range, Upper Range Limit $ 60
Number of Outstanding Options, Exercise Price Range | shares 3,714
Weighted Average Contractual Life, Outstanding Options, Exercise Price Range 3 years 2 months
Weighted Average Exercise Price, Outstanding Options, Exercise Price Range $ 58.26
Number of Exercisable Options, Exercise Price Range | shares 3,714
Weighted Average Exercise Price, Exercisable Options, Exercise Price Range $ 52.26
$60.01 - $70.00  
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]  
Exercise Price Range, Lower Range Limit 60.01
Exercise Price Range, Upper Range Limit $ 70
Number of Outstanding Options, Exercise Price Range | shares 0
Weighted Average Contractual Life, Outstanding Options, Exercise Price Range 0 years
Weighted Average Exercise Price, Outstanding Options, Exercise Price Range $ 0
Number of Exercisable Options, Exercise Price Range | shares 0
Weighted Average Exercise Price, Exercisable Options, Exercise Price Range $ 0
$70.01 - $80.00  
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]  
Exercise Price Range, Lower Range Limit 70.01
Exercise Price Range, Upper Range Limit $ 80
Number of Outstanding Options, Exercise Price Range | shares 85,009
Weighted Average Contractual Life, Outstanding Options, Exercise Price Range 5 years 8 months
Weighted Average Exercise Price, Outstanding Options, Exercise Price Range $ 72.4
Number of Exercisable Options, Exercise Price Range | shares 6,060
Weighted Average Exercise Price, Exercisable Options, Exercise Price Range $ 73.47
$80.01 - $90.00  
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]  
Exercise Price Range, Lower Range Limit 80.01
Exercise Price Range, Upper Range Limit $ 90
Number of Outstanding Options, Exercise Price Range | shares 27,945
Weighted Average Contractual Life, Outstanding Options, Exercise Price Range 5 years 1 month
Weighted Average Exercise Price, Outstanding Options, Exercise Price Range $ 87.3
Number of Exercisable Options, Exercise Price Range | shares 3,854
Weighted Average Exercise Price, Exercisable Options, Exercise Price Range $ 87.3