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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 Stock-based compensation expense is reflected in Cadence’s condensed consolidated income statements for the three and nine months ended September 28, 2019 and September 29, 2018 as follows:
| Three Months Ended |  | Nine Months Ended
| September 28, 2019 |  | September 29, 2018 |  | September 28, 2019 |  | September 29, 2018
| (In thousands)
Cost of product and maintenance | $ | 731 |  |  | $ | 736 |  |  | $ | 2,064 |  |  | $ | 1,932 |
Cost of services | 931 |  |  | 1,078 |  |  | 2,626 |  |  | 2,825 |
Marketing and sales | 10,424 |  |  | 9,528 |  |  | 29,039 |  |  | 25,410 |
Research and development | 30,458 |  |  | 28,668 |  |  | 85,015 |  |  | 77,003 |
General and administrative | 5,735 |  |  | 6,254 |  |  | 16,045 |  |  | 17,951 |
Total stock-based compensation expense | $ | 48,279 |  |  | $ | 46,264 |  |  | $ | 134,789 |  |  | $ | 125,121 |
Cadence had total unrecognized compensation expense related to stock option and restricted stock grants of $325.1 million as of September 28, 2019, which will be recognized over the remaining vesting period. The remaining weighted-average vesting period of unvested awards is 2.2 years.

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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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