Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2014

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

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
Income Statement Classifications	March 31, 2014		March 31, 2013
Cost of services and maintenance revenues	$	477	$	634
Research and development	12,780		15,653
Sales, marketing and services	16,016		15,174
General and administrative	11,428		12,095
Total	$	40,701	$	43,556

Schedule of Assumptions Used to Value Option Grants

The assumptions used to value option grants are as follows:

	Three Months Ended
	March 31, 2013
Expected volatility factor	0.39
Approximate risk free interest rate	0.44	%
Expected term (in years)	3.35
Expected dividend yield	0	%

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 2014 Grant		March 2013 Grant
Expected volatility factor	0.19 - 0.38		0.16 - 0.42
Risk free interest rate	0.81	%	0.33	%
Expected dividend yield	0	%	0	%