Stock-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2015

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

Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions

The Company used the Black-Scholes model to estimate the fair value of its Employee Stock Purchase Plan awards with the following weighted-average assumptions:

	Three Months Ended
	September 30, 2015
Expected volatility factor	0.35
Risk free interest rate	0.25	%
Expected dividend yield	0	%
Expected life (in years)	0.5

Schedule of Total Stock-based Compensation Recognized by Income Statement Classification

The detail of the total stock-based compensation recognized by income statement classification is as follows (in thousands):

	Three Months Ended		Three Months Ended		Nine Months Ended		Nine Months Ended
Income Statement Classifications	September 30, 2015		September 30, 2014		September 30, 2015		September 30, 2014
Cost of services and maintenance revenues	$	803	$	673	$	2,095	$	1,854
Research and development	9,118		13,989		31,454		42,102
Sales, marketing and services	16,922		15,073		38,083		46,885
General and administrative	11,828		12,714		32,042		37,599
Total	$	38,671	$	42,449	$	103,674	$	128,440

Schedule of Assumptions Used to Value Nonvested Share Grants

The grant date fair value of the non-vested performance stock unit awards was determined through the use of a Monte Carlo simulation model, which utilized multiple input variables that determined the probability of satisfying the market condition requirements applicable to each award as follows:

	March 2015 Grant		March 2014 Grant
Expected volatility factor	0.14 - 0.29		0.19 - 0.38
Risk free interest rate	0.85	%	0.81	%
Expected dividend yield	0	%	0	%