| Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] | Period [Axis] |
|---|
2016-01-01 - 2016-12-31 |
|---|
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] | |
Fair Value Assumptions |
The following table summarizes the assumptions we used:
|
|
|
For the Years Ended December 31, |
|
|
|
2016 |
|
2015 |
|
2014 |
|
Risk-free rate of return |
|
1.00% to 2.02% |
|
1.44% to 1.81% |
|
1.53% to 1.77% |
|
Expected dividend yields |
|
1.62% to 1.70% |
|
1.46% to 1.60% |
|
1.49% to 1.55% |
|
Expected award life (years) |
|
4.50 to 4.61 |
|
4.62 to 4.71 |
|
4.67 to 4.85 |
|
Expected volatility |
|
18.73% to 19.70% |
|
20.04% to 22.09% |
|
22.84% to 25.46% |
|
Summary of Restricted Share Activity |
A summary of restricted share activity as of December 31, 2016 and changes during the year then ended is as follows:
|
|
|
Shares |
|
|
Weighted-Average
Grant Date
Fair Value |
|
|
Outstanding at January 1, 2016 |
|
|
514,742 |
|
|
$ |
36.87 |
|
|
Granted |
|
|
287,227 |
|
|
$ |
50.84 |
|
|
Vested and issued |
|
|
(71,177 |
) |
|
$ |
32.75 |
|
|
Expired or forfeited |
|
|
(28,762 |
) |
|
$ |
44.49 |
|
|
Outstanding at December 31, 2016 |
|
|
702,030 |
|
|
$ |
42.69 |
|
|
Summary of Stock-Settled SARs Activity |
A summary of stock-settled SARs activity as of December 31, 2016 and changes during the year then ended is as follows:
|
|
|
Shares |
|
|
Weighted-Average
Exercise Price |
|
|
Outstanding at January 1, 2016 |
|
|
1,438,146 |
|
|
$ |
29.52 |
|
|
Granted |
|
|
542 |
|
|
$ |
36.71 |
|
|
Converted from cash-settled SARs |
|
|
944,046 |
|
|
$ |
41.21 |
|
|
Exercised |
|
|
(251,134 |
) |
|
$ |
24.46 |
|
|
Expired or forfeited |
|
|
(148,905 |
) |
|
$ |
41.93 |
|
|
Outstanding at December 31, 2016 |
|
|
1,982,695 |
|
|
$ |
34.80 |
|
|
Vested or expected to vest as of end of year |
|
|
1,808,016 |
|
|
$ |
20.19 |
|
|
Exercisable at end of year |
|
|
851,491 |
|
|
$ |
30.02 |
|
|
Summary of Cash-Settled SARs Activity |
A summary of cash-settled SARs activity as of December 31, 2016 and changes during the year then ended is as follows:
|
|
|
Shares |
|
|
Weighted-Average
Exercise Price |
|
|
Outstanding at January 1, 2016 |
|
|
2,220,560 |
|
|
$ |
35.53 |
|
|
Granted |
|
|
540 |
|
|
$ |
36.71 |
|
|
Converted to stock-settled SARs(1) |
|
|
(864,036 |
) |
|
$ |
41.21 |
|
|
Exercised |
|
|
(742,424 |
) |
|
$ |
30.70 |
|
|
Expired or forfeited |
|
|
(114,154 |
) |
|
$ |
39.03 |
|
|
Outstanding at December 31, 2016 |
|
|
500,486 |
|
|
$ |
32.08 |
|
|
Vested or expected to vest as of end of year |
|
|
480,891 |
|
|
$ |
32.13 |
|
|
Exercisable at end of year |
|
|
373,655 |
|
|
$ |
32.44 |
|
|