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Stock-Based Compensation
 3 Months Ended
Mar. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Stock-Based Compensation
Stock-Based Compensation

A summary of restricted share activity for the three months ended March 31, 2018 is as follows:

 
2018
 
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
342,859

 
$
34.71

 
165,000

 
$
38.10

Granted
16,500

 
43.74

 
—

 
—

Vested
(14,667
)
 
37.76

 
—

 
—

Canceled or expired
(4,500
)
 
37.50

 
—

 
—

Outstanding - end of period
340,192

 
$
34.71

 
165,000

 
$
38.10



Total stock-based compensation expense included in selling, general and administrative expenses during the first three months of 2018 and 2017 was $2.2 million in each period. As of March 31, 2018, there was $7.7 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 1.6 years.