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Share-Based Compensation (Tables)
 9 Months Ended
Sep. 30, 2019
Share-based Payment Arrangement [Abstract]  
Summary of Assumptions and Fair Values for RSUs Granted in the Period The assumptions and fair value for the RSUs granted during the nine months ended September 30, 2019 are included in the following table on a per share basis.
 2019
Fair value of RSUs granted$39.65  
Expected term (years)4
Expected volatility13.98 %
Risk-free rate2.52 %