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Stock Based Compensation
 6 Months Ended
Jul. 03, 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 six months ended July 3, 2021 and June 27, 2020 as follows:
Three Months Ended Six Months Ended
July 3,
2021		June 27,
2020		July 3,
2021		June 27,
2020
(In thousands)
Cost of product and maintenance$909 $683 $1,716 $1,374 
Cost of services992 869 2,019 1,749 
Marketing and sales10,294 10,116 21,500 20,127 
Research and development31,286 29,690 64,144 59,036 
General and administrative7,037 5,549 13,735 11,103 
Total stock-based compensation expense$50,518 $46,907 $103,114 $93,389 
Cadence had total unrecognized compensation expense related to stock option and restricted stock grants of $283.2 million as of July 3, 2021, which will be recognized over the remaining vesting period. The remaining weighted-average vesting period of unvested awards is 2.1 years.