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Stock Based Compensation | 9 Months Ended
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Oct. 02, 2021
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 October 2, 2021 and September 26, 2020 as follows:
| Three Months Ended |  | Nine Months Ended
| October 2, 2021 |  | September 26, 2020 |  | October 2, 2021 |  | September 26, 2020
| (In thousands)
Cost of product and maintenance | $ | 885 |  |  | $ | 668 |  |  | $ | 2,601 |  |  | $ | 2,042 |
Cost of services | 1,158 |  |  | 850 |  |  | 3,177 |  |  | 2,599 |
Marketing and sales | 10,784 |  |  | 9,699 |  |  | 32,284 |  |  | 29,826 |
Research and development | 32,957 |  |  | 28,652 |  |  | 97,101 |  |  | 87,688 |
General and administrative | 6,962 |  |  | 5,465 |  |  | 20,697 |  |  | 16,568 |
Total stock-based compensation expense | $ | 52,746 |  |  | $ | 45,334 |  |  | $ | 155,860 |  |  | $ | 138,723 |
Cadence had total unrecognized compensation expense related to stock option and restricted stock grants of $375.0 million as of October 2, 2021, which will be recognized over the remaining vesting period. The remaining weighted average vesting period of unvested awards is 2.1 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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