Share-Based Compensation (Tables) |
9 Months Ended | ||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Sep. 30, 2017 | |||||||||||||||||||||||||||||||||||||||||||
| Share-based Compensation [Abstract] | |||||||||||||||||||||||||||||||||||||||||||
| Fair Value Assumptions for Performance Awards |
The fair values of the senior executives' performance share award grants with a TSR modifier for grants in 2017 and 2016 were $64.82 and $38.54, respectively, which were estimated using the Monte Carlo valuation model, and incorporated the following assumptions:
|
||||||||||||||||||||||||||||||||||||||||||
| X | ||||||||||
- Definition Schedule of Share-based Payment Award, Equity Instruments Other than Options, Valuation Assumptions [Table Text Block] No definition available.
|
| X | ||||||||||
- References No definition available.
|