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Stock-Based Compensation | 9 Months Ended
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Sep. 28, 2019
Share-based Payment Arrangement [Abstract] |
Stock-Based Compensation | Stock-Based Compensation The Corporation measures stock-based compensation expense at grant date, based on the fair value of the award, and recognizes expense over the employees' requisite service periods. Stock-based compensation expense is the cost of stock options and time-based restricted stock units issued under the shareholder approved stock-based compensation plans and shares issued under the shareholder approved member stock purchase plans. The following table summarizes expense associated with these plans (in thousands):
| Three Months Ended |  | Nine Months Ended
| September 28, 2019 |  | September 29, 2018 |  | September 28, 2019 |  | September 29, 2018
Compensation cost | $ | 1,336 |  |  | $ | 1,307 |  |  | $ | 5,408 |  |  | $ | 6,215 |
The options and units granted by the Corporation had fair values as follows (in thousands):
| Nine Months Ended
| September 28, 2019 |  | September 29, 2018
Stock options | $ | 6,211 |  |  | $ | 7,200 |
Restricted stock units | $ | 361 |  |  | $ | 76 |
The following table summarizes unrecognized compensation expense and the weighted-average remaining service period for non-vested stock options and restricted stock units as of September 28, 2019:
| Unrecognized Compensation Expense (in thousands) |  | Weighted-Average Remaining Service Period (years)
Non-vested stock options | $ | 4,237 |  |  | 1.1
Non-vested restricted stock units | $ | 516 |  |  | 1.1

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- Definition The entire disclosure for share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -URI http://asc.fasb.org/topic&trid=2228938 + Details
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