Quarterly report pursuant to Section 13 or 15(d)

Stock-based Compensation - Schedule of Assumption Used and Resulting Weighted Average Fair Value of Stock Option Granted (Details)

v3.8.0.1
Stock-based Compensation - Schedule of Assumption Used and Resulting Weighted Average Fair Value of Stock Option Granted (Details)
9 Months Ended
Sep. 30, 2017
$ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Expected volatility, minimum 23.00%
Expected volatility, maximum 30.00%
Weighted average expected volatility 24.00%
Weighted average dividend yield 2.80%
Risk-free interest rate, minimum 0.70%
Risk-free interest rate, maximum 2.40%
Weighted average fair value at date of grant (in USD per share) $ 9.90
Minimum  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Expected term (in years) 6 years 3 months 18 days
Maximum  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Expected term (in years) 7 years 8 months 12 days