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Stock-Based Compensation (Tables) | 9 Months Ended
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Sep. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Schedule of Stock Based Compensation Expense | The following table summarizes stock-based compensation expense (in thousands):
| Three Months Ended |  | Nine Months Ended
| September 30, 2017 |  | October 1, 2016 |  | September 30, 2017 |  | October 1, 2016
Stock-based compensation expense | $ | 956 |  |  | $ | 959 |  |  | $ | 6,759 |  |  | $ | 7,400 |
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 30, 2017 |  | October 1, 2016
Stock options | $ | 7,206 |  |  | $ | 7,720 |
Time-based restricted stock units | $ | — |  |  | $ | 712 |
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 restricted stock units as of September 30, 2017:
| Unrecognized Compensation Expense (in thousands) |  | Weighted-Average Remaining Service Period (years)
Non-vested stock options | $ | 4,103 |  |  | 1.2
Non-vested restricted stock units | $ | 474 |  |  | 0.8

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- Definition Tabular disclosure of the amount of total share-based compensation cost, including the amounts attributable to each share-based compensation plan and any related tax benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure for share-based compensation plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the total compensation cost related to nonvested awards not yet recognized and the weighted-average period over which it is expected to be recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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