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Share-Based Payments (Tables)
 12 Months Ended
Dec. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Weighted-Average Assumptions Used to Determine Fair Value of Stock Options
The fair value of the SARs granted in conjunction with the EHHI acquisition has been estimated using the Black-Scholes option-pricing model with the following weighted-average assumptions:
 
For the Year Ended December 31,
 
2017
 
2016
Expected volatility
28.7
%
 
25.9
%
Risk-free interest rate
1.9
%
 
1.9
%
Expected life (years)
2.1

 
5.3

Dividend yield
—
%
 
—
%
The fair values of the options granted during the years ended December 31, 2017, 2016, and 2015 have been estimated at the grant date using the Black-Scholes option-pricing model with the following weighted-average assumptions:
 
For the Year Ended December 31,
 
2017
 
2016
 
2015
Expected volatility
30.5
%
 
37.2
%
 
39.5
%
Risk-free interest rate
2.1
%
 
1.6
%
 
1.9
%
Expected life (years)
7.7

 
7.5

 
7.7

Dividend yield
2.2
%
 
2.1
%
 
2.1
%
Schedule of Stock Option Activity
A summary of our stock option activity and related information is as follows:
 
Shares
(In Thousands)
 
Weighted- Average Exercise Price per Share
 
Weighted- Average Remaining Life (Years)
 
Aggregate Intrinsic Value
(In Millions)
Outstanding, December 31, 2016
1,575

 
$
21.45

 
 
 
 
Granted
95

 
42.22

 
 
 
 
Exercised
(1,107
)
 
18.58

 
 
 
 
Forfeitures
(3
)
 
43.14

 
 
 
 
Expirations
(3
)
 
23.19

 
 
 
 
Outstanding, December 31, 2017
557

 
30.53

 
6.0
 
$
10.5

Exercisable, December 31, 2017
377

 
25.81

 
4.6
 
8.9
Schedule of Restricted Stock Activity
A summary of our issued restricted stock awards is as follows (share information in thousands):
 
Shares
 
Weighted-Average Grant Date Fair Value
Nonvested shares at December 31, 2016
618

 
$
35.06

Granted
504

 
42.85

Vested
(427
)
 
34.83

Forfeited
(22
)
 
39.22

Nonvested shares at December 31, 2017
673

 
40.90