Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2018

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

Stock-Based Compensation Expense and Its Net Impact on Basic and Diluted Earnings Per Share

Total stock-based compensation expense and its net impact on basic and diluted earnings per share are as follows:

	Three Months Ended
(in thousands, except per share data)	March 31, 2018			March 31, 2017
Cost of sales:
Software licenses	$	—		$	250
Maintenance and service	1,010			426
Operating expenses:
Selling, general and administrative	8,278			5,956
Research and development	5,981			3,881
Stock-based compensation expense before taxes	15,269			10,513
Related income tax benefits	(11,304		)	(10,421		)
Stock-based compensation expense, net of taxes	$	3,965		$	92
Net impact on earnings per share:
Basic earnings per share	$	(0.05	)	$	—
Diluted earnings per share	$	(0.05	)	$	—