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Stock-Based Incentive Plans (Tables)
9 Months Ended
Sep. 30, 2016
Restricted Stock  
Stock-Based Compensation  
Schedule of unvested restricted stock unit activity
The following table summarizes the Company’s unvested restricted stock unit activity for the nine months ended September 30, 2016
 
Shares
 
Weighted-
Average Price
 
Aggregate
Intrinsic
Value *
Unvested Restricted Stock Units (RSUs)
(in thousands)
 
 
(in thousands)
Outstanding at January 1, 2016
527

 
$
31.56

 
 

Awarded
442

 
 

 
 

Vested
(341
)
 
 

 
 

Forfeited
(11
)
 
 

 
 

Outstanding at September 30, 2016
617

 
$
31.81

 
$
27,108

Outstanding and expected to vest at September 30, 2016
602

 
$
31.81

 
$
26,470

             
*
The intrinsic value is calculated using the closing price per share of $43.95 as reported by the New York Stock Exchange on September 30, 2016.
Non-Qualified Stock Options  
Stock-Based Compensation  
Summary of stock option activity
The following table summarizes the Company’s stock option activity for the nine months ended September 30, 2016
 
 
Shares
 
Weighted-
Average
Exercise Price
 
Weighted-
Average
Remaining
Contractual Life
 
Aggregate
Intrinsic
Value *
Non-Qualified Stock Options
 
(in thousands)
 
 
 
(in years)
 
(in thousands)
Outstanding at January 1, 2016
 
523

 
$
29.55

 
 
 
 

Exercised
 
(227
)
 
 

 
 
 
 

Forfeited
 
(1
)
 
 

 
 
 
 

Outstanding and exercisable at September 30, 2016
 
295

 
$
29.62

 
1.3
 
$
4,221

            
*
The intrinsic value represents the amount, if any, by which the fair market value of the underlying common stock exceeds the exercise price of the stock option, using the closing price per share of $43.95 as reported by the New York Stock Exchange on September 30, 2016.