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Share Based Compensation | 9 Months Ended
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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.

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- Definition The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 40 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=65895303&loc=d3e17540-113929 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 50 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=68057994&loc=d3e25284-112666 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5444-113901 + Details
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