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Stock-Based Compensation (Tables)
 12 Months Ended
Dec. 31, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Weighted-Average Assumptions used in Option Pricing Model
The following table presents the weighted-average assumptions used in the option pricing model for the periods indicated:
Years ended December 31,
2013
 
2012
 
2011
Expected volatility
30.61
%
 
37.46
%
 
36.36
%
Expected dividend yield
3.00
%
 
3.35
%
 
3.17
%
Risk-free interest rate
0.88
%
 
1.99
%
 
3.05
%
Expected life of options (in years)
5.52

 
7.85

 
7.97
Schedule of Share-based Compensation, Stock Options, Activity
The following table summarizes stock option activity under the Company’s active stock option plans for the year ended December 31, 2013:
 
Number of
Shares
 
Weighted-Average
Exercise Price
 
Weighted-Average
Remaining
Contract Life
Outstanding options, beginning of year
3,373,655

 
$
16.60

 
 
Granted
450,633

 
17.37

 
 
Exercised
(1,166,507
)
 
15.42

 
 
Forfeited
(26,911
)
 
15.74

 
 
Expired
(107,277
)
 
18.70

 
 
Outstanding options, end of year
2,523,593

 
$
17.20

 
4.98 years
Outstanding options exercisable, end of year
1,789,687

 
$
17.67

 
4.21 years
Information with respect to the Company’s nonvested stock options as of and for the year ended December 31, 2013 follows:
 
Number of
Shares
 
Weighted-Average
Grant Date Fair Value
Nonvested stock options, beginning of year
617,214

 
$
4.20

Granted
450,633

 
3.54

Vested
(307,030
)
 
4.28

Forfeited
(26,911
)
 
3.82

Nonvested stock options, end of year
733,906

 
$
3.78
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity
The following table presents information regarding the Company’s restricted stock as of December 31, 2013:
 
Number of
Shares
 
Weighted-Average
Measurement Date
Fair Value
Restricted stock, beginning of year
230,730

 
$
14.38

Granted
120,873

 
17.72

Vested
(94,946
)
 
14.51

Forfeited
(12,198
)
 
15.35

Canceled
(18,934
)
 
14.20

Restricted stock, end of year
225,525

 
$
16.08