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Stock-Based Compensation (Tables)
 12 Months Ended
Dec. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
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, 2015:
 
Number of
Shares
 
Weighted-Average
Exercise Price
 
Weighted-Average
Remaining
Contract Life
Outstanding options, beginning of year
1,748,032

 
$
17.01

 
 
Exercised
(350,438
)
 
16.77

 
 
Forfeited
(10,216
)
 
16.82

 
 
Outstanding options, end of year
1,387,378

 
$
17.06

 
3.68 years
Outstanding options exercisable, end of year
1,265,596

 
$
17.05

 
3.64 years
Information with respect to the Company’s nonvested stock options as of and for the year ended December 31, 2015 follows:
 
Number of
Shares
 
Weighted-Average
Grant Date Fair Value
Nonvested stock options, beginning of year
355,022

 
$
3.62

Vested
(225,961
)
 
3.73

Forfeited
(7,279
)
 
3.48

Nonvested stock options, end of year
121,782

 
$
3.48
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, 2015:
 
Number of
Shares
 
Weighted-Average
Measurement Date
Fair Value
Restricted stock, beginning of year
248,399

 
$
21.16

Granted
169,577

 
26.27

Vested
(95,153
)
 
18.65

Forfeited
(16,583
)
 
24.07

Canceled
(2,601
)
 
17.22

Restricted stock, end of year
303,639

 
$
25.15