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Stock Based Compensation - Schedule of Exercise Price Range (Details)
shares in Thousands
6 Months Ended
Jun. 30, 2019
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Stock options outstanding, number (shares) | shares 15
Stock options outstanding, weighted average remaining contractual term (in years) 4 years 10 months 24 days
Stock options outstanding, weighted average exercise price (USD per share) $ 47.77
Options exercisable, vested (shares) | shares 15
Options exercisable, weighted average exercise price (USD per share) $ 47.77
$15.72 - $47.99  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Stock options outstanding, number (shares) | shares 10
Stock options outstanding, weighted average remaining contractual term (in years) 5 years 2 months 12 days
Stock options outstanding, weighted average exercise price (USD per share) $ 46.84
Options exercisable, vested (shares) | shares 10
Options exercisable, weighted average exercise price (USD per share) $ 46.84
Exercise price, minimum (USD per share) 15.72
Exercise price, maximum (USD per share) $ 47.99
$48.00 - $51.60  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Stock options outstanding, number (shares) | shares 5
Stock options outstanding, weighted average remaining contractual term (in years) 4 years 2 months 12 days
Stock options outstanding, weighted average exercise price (USD per share) $ 49.42
Options exercisable, vested (shares) | shares 5
Options exercisable, weighted average exercise price (USD per share) $ 49.42
Exercise price, minimum (USD per share) 48.00
Exercise price, maximum (USD per share) $ 51.60