Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Assumptions) (Details)

v3.19.1
Stock-Based Compensation (Assumptions) (Details) - $ / shares
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Summary of weighted average assumptions used to value options granted    
Grant date fair value of options (in dollars per share) $ 21.55 $ 0.00
Volatility (as a percent) 40.00% 0.00%
Risk-free interest rate (as a percent) 2.50% 0.00%
Dividend yield (as a percent) 0.00% 0.00%
Expected term (in years) 6 years 6 months 0 years