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Stock-Based Compensation
9 Months Ended
Sep. 30, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Stock-Based Compensation
Stock-Based Compensation

A summary of stock option activity for the nine months ended September 30, 2016 is as follows:

 
2016
 
Number of Shares
 
Weighted Average
Exercise Price
 
Weighted
Average
Remaining
Contractual
Term
 
Aggregate
Intrinsic
Value
 
(In whole shares)
 
 
 
 
 
(In millions)
Outstanding - beginning of year
60,000

 
$
19.41

 
 
 
 
Granted

 

 
 
 
 
Exercised
(2,000
)
 
15.61

 
 
 
 
Canceled or expired

 

 
 
 
 
Outstanding - end of period
58,000

 
$
19.54

 
1.1 years
 
$
1.0

Options exercisable
58,000

 
$
19.54

 
1.1 years
 
$
1.0



A summary of restricted share activity for the nine months ended September 30, 2016 is as follows:

 
2016
 
Time-Based
 
Performance-Based
 
Number of Shares
 
Weighted Average
Grant Date
Fair Value
 
Number of Shares
 
Weighted Average
Grant Date
Fair Value
 
(In whole shares)
 
 
 
(In whole shares)
 
 
Outstanding - beginning of year
208,429

 
$
36.61

 
120,000

 
$
48.72

Granted
58,570

 
30.72

 
165,000

 
34.78

Vested
(107,831
)
 
40.09

 
(40,000
)
 
48.72

Performance-based to time-based (a)
80,000

 
48.72

 
(80,000
)
 
48.72

Canceled or expired
(1,334
)
 
39.82

 

 

Outstanding - end of period
237,834

 
$
37.63

 
165,000

 
$
34.78


(a) During the second quarter of 2016, 40,000 of the performance-based restricted shares granted in 2015 fully vested based on achievement of the performance criteria. In accordance with the grant agreements, the remaining 80,000 shares became time-based, vesting over the remaining two years of the requisite service period.

During the first quarter of 2016, 1,500 shares were awarded, vested and expensed at the time of the award. The value of the award was immaterial.

Total stock-based compensation expense included in selling, general and administrative expenses during the first nine months of 2016 and 2015 was $8.1 million and $5.3 million, respectively. As of September 30, 2016, there was $10.2 million of unrecognized compensation cost related to non-vested stock-based compensation, which cost is expected to be recognized over a weighted average period of 1.5 years.