Stock Based Compensation

3 Months Ended

Mar. 31, 2018

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Stock-based compensation expense is reflected in Cadence’s condensed consolidated income statements for the three months ended March 31, 2018 and April 1, 2017 as follows:



	Three Months Ended
	March 31, 2018		April 1, 2017
	(In thousands)
Cost of product and maintenance	$	590	$	529
Cost of services	863		761
Marketing and sales	7,614		6,008
Research and development	23,235		15,482
General and administrative	5,599		4,656
Total stock-based compensation expense	$	37,901	$	27,436

Cadence had total unrecognized compensation expense related to stock option and restricted stock grants of $261.8 million as of March 31, 2018, which will be recognized over the remaining vesting period. The remaining weighted-average vesting period of unvested awards is 2.1 years.