Equity-Based Compensation - Grant Date Fair Value for Awards of Performance Units Inputs (Details) - Performance Stock Units - $ / shares |
9 Months Ended | |||
---|---|---|---|---|
Sep. 30, 2019 |
Sep. 30, 2018 |
Mar. 08, 2019 |
Feb. 28, 2018 |
|
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
Valuation date price based on closing stock prices (in dollars per share) | $ 35.19 | $ 34.44 | ||
Expected volatility | 25.00% | 34.00% | ||
Risk-free interest rate | 2.43% | 2.39% | ||
Term in years | 2 years 9 months 21 days | 2 years 10 months 2 days |