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Equity-Based Compensation (Tables) | 9 Months Ended
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Sep. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Grant Date Fair Value for Awards of Performance Units Inputs | The grant date fair value for awards of performance units with market-based metrics, which were granted in the nine months ended September 30, 2017, was based on a fair value as determined using a Monte Carlo simulation valuation methodology using the following key inputs:
Valuation date stock price based on the March 22, 2017 closing stock price | $36.31
Expected volatility | 36.00 | %
Risk-free interest rate | 1.46 | %
Term in years | 2.78 |

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- Definition Schedule Of Share Based Payment Award, Equity Instruments Other Than Options, Valuation Assumptions [Table Text Block] + References No definition available. + Details
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