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Share Based Compensation
9 Months Ended
Sep. 30, 2017
Share-based Compensation [Abstract]  
Share Based Compensation
Share-Based Compensation:

Share-based compensation includes stock option and restricted stock unit awards and certain transactions under our Employee Stock Purchase Plan (the “ESPP”). Share-based compensation expense is recognized based on grant date fair value of all options and restricted stock unit awards plus a discount on shares purchased by employees as a part of the ESPP.

There were no significant modifications to the Company’s share-based compensation plans during the fiscal nine months ended September 30, 2017.
For the third quarters of fiscal 2017 and 2016, share-based compensation expense was $7.9 million and $6.1 million, respectively, and $22.9 million and $17.3 million for the first nine months of fiscal 2017 and 2016, respectively.

Stock Options

The following table summarizes information concerning stock option grants during the first nine months of fiscal 2017 and 2016:
 
Fiscal nine months ended
 
September 30,
2017
 
September 24,
2016
Stock options granted
1,619,280

 
1,134,121

Weighted average exercise price
$
72.16

 
$
86.41

Weighted average fair value per option
$
14.57

 
$
19.62



As of September 30, 2017, total unrecognized compensation expense related to non-vested stock options was approximately $25.0 million with a remaining weighted average expense recognition period of 2.0 years.

Restricted Stock Units

The following table summarizes information concerning restricted stock unit grants during the first nine months of fiscal 2017 and 2016:
 
Fiscal nine months ended
 
September 30,
2017
 
September 24,
2016
Restricted stock units granted
85,049

 
59,019

Weighted average fair value per share
$
66.34

 
$
84.25



As of September 30, 2017, total unrecognized compensation expense related to non-vested restricted stock units was approximately $5.6 million with a remaining weighted average expense recognition period of 1.7 years.