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Stock-Based Compensation (Tables) | 9 Months Ended
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Sep. 26, 2020
Share-based Payment Arrangement [Abstract] |
Schedule of Stock Based Compensation Expense | The following table summarizes expense associated with these plans (in thousands):
| Three Months Ended |  |  |  | Nine Months Ended |  |
| September 26, 2020 |  | September 28, 2019 |  | September 26, 2020 |  | September 28, 2019
Compensation cost | $ | 1,087 |  |  | $ | 1,336 |  |  | $ | 6,746 |  |  | $ | 5,408 |
Schedule of Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period | The options and units granted by the Corporation had fair values as follows (in thousands):
| Nine Months Ended |  |
| September 26, 2020 |  | September 28, 2019
Stock options | $ | — |  |  | $ | 6,211 |
Restricted stock units | $ | 6,431 |  |  | $ | 361 |
Performance stock units | $ | 5,920 |  |  | $ | — |
Schedule of Unrecognized Compensation Cost, Nonvested Awards | The following table summarizes unrecognized compensation expense and the weighted-average remaining service period for non-vested stock options and stock units as of September 26, 2020:
| Unrecognized Compensation Expense (in thousands) |  | Weighted-Average Remaining Service Period (years)
Non-vested stock options | $ | 1,519 |  |  | 1.1
Non-vested restricted stock units | $ | 1,994 |  |  | 0.9
Non-vested performance stock units | $ | 876 |  |  | 1.3

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- Definition Tabular disclosure of activity for award under share-based payment arrangement. Includes, but is not limited to, outstanding award at beginning and end of year, granted, exercised, forfeited, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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