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SHARE-BASED COMPENSATION PLANS AND AWARDS (Tables)
12 Months Ended
Dec. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Assumptions Used in the Determination of Fair Value of Stock Options Awarded
The weighted average assumptions used in the determination of fair value for stock options awarded in 2015, 2014, and 2013 are provided in the table below.
Assumptions
 
2015
 
2014
 
2013
Expected volatility rate
 
24.11%
 
25.82%
 
34.90%
Expected dividend yield
 
1.75%
 
1.70%
 
1.97%
Average risk-free interest rate
 
1.45%
 
1.44%
 
0.77%
Expected forfeiture rate
 
0.75%
 
0.75%
 
0.75%
Expected term years
 
4.8
 
4.7
 
5.0

Schedule of Activity of Stock Option Awards
A summary of the activity of the Company's stock option awards for 2015, 2014, and 2013 is presented below:
 
2015
 
2014
 
2013
 
Options
 
Weighted-Average Exercise Price
 
Options
 
Weighted-Average Exercise Price
 
Options
 
Weighted-Average Exercise Price
Outstanding at beginning of year
2,209,800

 
$
46

 
2,359,100

 
$
39

 
2,480,100

 
$
33

Granted
512,700

 
74

 
272,100

 
86

 
317,900

 
70

Exercised
(271,200
)
 
30

 
(419,300
)
 
31

 
(436,500
)
 
28

Cancelled, forfeited, or expired
(16,700
)
 
77

 
(2,100
)
 
55

 
(2,400
)
 
15

Outstanding at end of year
2,434,600

 
$
53

 
2,209,800

 
$
46

 
2,359,100

 
$
39

Options exercisable at year-end
1,643,100

 
 
 
1,726,800

 
 
 
1,862,000

 
 
Available for grant at end of year
5,413,250

 
 
 
7,271,093

 
 
 
8,454,854

 
 

Schedule of Remaining Contractual Term and Weighted Average Exercise Price of Stock Options Outstanding and Exercisable
The following table provides the remaining contractual term and weighted average exercise prices of stock options outstanding and exercisable at December 31, 2015:
 
 
Options Outstanding
 
Options Exercisable
Range of Exercise Prices
 
Number  Outstanding at
December 31, 2015
 
Weighted-Average Remaining Contractual Life (Years)
 
Weighted-Average Exercise Price
 
Number Exercisable at
December 31, 2015
 
Weighted-Average Exercise Price
$18-$29
 
272,100
 
3.7
 
$
27

 
272,100
 
$
27

$30-$34
 
211,700
 
1.2
 
32

 
211,700
 
32

$35-$40
 
868,000
 
5.3
 
39

 
868,000
 
39

$41-$87
 
1,082,800
 
8.4
 
76

 
291,300
 
74

 
 
2,434,600
 
6.1
 
$
53

 
1,643,100
 
$
42


Schedule of Summary of Status of Nonvested Options
A summary of the status of the Company's nonvested options as of December 31, 2015 and changes during the year then ended is presented below:
Nonvested Options
 
Number of Options
 
Weighted-Average Grant Date Fair Value
Nonvested at January 1, 2015
 
483,000
 
$17.47
Granted
 
512,700
 
13.89
Vested
 
(187,400)
 
17.66
Forfeited
 
(16,800)
 
14.55
Nonvested options at December 31, 2015
 
791,500
 
$15.17