Stock-Based Compensation

6 Months Ended

Jun. 30, 2015

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

The Company’s stock-based compensation program is a long-term retention program that is intended to attract and reward talented employees and align stockholder and employee interests. As of June 30, 2015, the Company had two stock-based compensation plans under which it was granting stock options and non-vested stock units. The Company is currently granting stock-based awards from its 2014 Equity Incentive Plan (the "2014 Plan"). During 2014, the Company granted certain stock-based awards under its Amended and Restated 2005 Employee Stock Purchase Plan (as amended, the “2005 ESPP”). In December 2014, the Company's Board of Directors approved the 2015 Employee Stock Purchase Plan (the “2015 ESPP”), which was approved by stockholders at the Company's Annual Meeting of Stockholders held on May 28, 2015. The 2015 ESPP has replaced the Company's 2005 ESPP. In connection with certain of the Company’s acquisitions, the Company has assumed certain plans from acquired companies. The Company’s Board of Directors has provided that no new awards will be granted under the Company’s acquired stock plans. Awards previously granted under the Company's superseded and expired stock plans that are still outstanding typically expire between five and ten years from the date of grant and will continue to be subject to all the terms and conditions of such plans, as applicable. The Company’s superseded and expired stock plans include the Amended and Restated 1995 Stock Plan and the Amended and Restated 2005 Equity Incentive Plan.

Under the terms of the 2014 Plan, the Company is authorized to grant incentive stock options (“ISOs”), non-qualified stock options (“NSOs”), non-vested stock, non-vested stock units, stock appreciation rights (“SARs”), and performance units and to make stock-based awards to full and part-time employees of the Company and its subsidiaries or affiliates, where legally eligible to participate, as well as to consultants and non-employee directors of the Company. SARs and ISOs are not currently being granted. Currently, the 2014 Plan provides for the issuance of 29,000,000 shares of common stock. In addition, shares of common stock underlying any awards granted under the Company’s Amended and Restated 2005 Equity Incentive Plan, as amended, that are forfeited, canceled or otherwise terminated (other than by exercise) are added to its shares of common stock available for issuance under the 2014 Plan. Under the 2014 Plan, NSOs must be granted at exercise prices no less than fair market value on the date of grant. Non-vested stock awards may be granted for such consideration in cash, other property or services, or a combination thereof, as determined by the Company’s Compensation Committee of its Board of Directors. Stock-based awards are generally exercisable or issuable upon vesting. The Company’s policy is to recognize compensation cost for awards with only service conditions and a graded vesting schedule on a straight-line basis over the requisite service period for the entire award. As of June 30, 2015, there were 30,981,477 shares of common stock reserved for issuance pursuant to the Company’s stock-based compensation plans and the Company had authorization under its 2014 Plan to grant stock-based awards covering 23,036,372 shares of common stock.

Under the 2015 ESPP, all full-time and certain part-time employees of the Company are eligible to purchase common stock of the Company twice per year at the end of a six-month payment period (a “Payment Period”). During each Payment Period, eligible employees who so elect may authorize payroll deductions in an amount no less than 1% nor greater than 10% of his or her base pay for each payroll period in the Payment Period. At the end of each Payment Period, the accumulated deductions are used to purchase shares of common stock from the Company up to a maximum of 12,000 shares for any one employee during a Payment Period. Shares are purchased at a price equal to 85% of the fair market value of the Company’s common stock on the last business day of a Payment Period. Employees who, after exercising their rights to purchase shares of common stock in the 2015 ESPP, would own shares representing 5% or more of the voting power of the Company’s common stock, are ineligible to continue to participate under the 2015 ESPP. The 2015 ESPP provides for the issuance of a maximum of 16,000,000 shares of common stock. As of June 30, 2015, 3,872,661 shares had been issued under the 2005 ESPP. As of June 30, 2015, no shares have been issued under the 2015 ESPP. The Company recorded stock-based compensation costs related to its employee stock purchase plans of $1.3 million and $2.9 million for the three and six months ended June 30, 2015, respectively, and the Company recorded stock-based compensation costs of $1.3 million and $2.7 million for the three and six months ended June 30, 2014, respectively. Effective with the Payment Period beginning in July 2015, the purchase price to participating employees will be 85% of the fair market value of the Company's common stock, on either the first business day of the Payment Period or the last business day of the Payment Period, whichever is lower.

Stock-Based Compensation

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



	Three Months Ended		Three Months Ended		Six Months Ended		Six Months Ended
Income Statement Classifications	June 30, 2015		June 30, 2014		June 30, 2015		June 30, 2014
Cost of services and maintenance revenues	$	742	$	704	$	1,292	$	1,181
Research and development	9,079		15,333		22,336		28,113
Sales, marketing and services	10,465		15,796		21,161		31,812
General and administrative	10,506		13,457		20,214		24,885
Total	$	30,792	$	45,290	$	65,003	$	85,991

Non-vested Stock Units

Market Performance and Service Condition Stock Units

In March 2015 and 2014, the Company granted senior level employees non-vested stock unit awards representing, in the aggregate, 393,464 and 378,022 non-vested stock units, respectively, that vest based on certain target market performance and service conditions. The number of non-vested stock units underlying each award will be determined within sixty days of the calendar year following the end of a three-year performance period ending December 31, 2017 for the March 2015 awards and December 31, 2016 for the March 2014 awards. The attainment level under the award will be based on the Company's total return to stockholders over the performance period compared to the return on the Nasdaq Composite Total Return Index (the "XCMP"). If the Company's return is positive and meets or exceeds the indexed return, the number of non-vested stock units issued will be based on interpolation, with the maximum number of non-vested stock units issuable pursuant to the award capped at 200% of the target number of non-vested stock units set forth in the award agreement if the Company's return exceeds the indexed return by 40% or more. If the Company's return over the performance period is positive but underperforms the index, a number of non-vested stock units will be issued, below the target award, based on interpolation; however, no non-vested stock units will be issued if the Company's return underperforms the index by more than 20% over the performance period. In the event the Company's return to stockholders is negative but still meets or exceeds the indexed return, only 75% of the target award shall be issued. If the awardee is not employed by the Company at the end of the performance period; the extent to which the awardee will vest in the award, if at all, is dependent upon the timing and character of the termination as provided in the award agreement. Each non-vested stock unit, upon vesting, represents the right to receive one share of the Company's common stock.

The market condition requirements are reflected in the grant date fair value of the award, and the compensation expense for the award will be recognized assuming that the requisite service is rendered regardless of whether the market conditions are achieved. 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	%

The range of expected volatilities utilized was based on the historical volatilities of the Company's common stock and the XCMP. The Company chose to use historical volatility to value these awards because historical stock prices were used to develop the correlation coefficients between the Company and the XCMP in order to model the stock price movements. The volatilities used were calculated over a 2.76 year period, which was the remaining term of the performance period at the date of grant. The risk free interest rate was based on the implied yield available on U.S. Treasury zero-coupon issues with remaining terms equivalent to the remaining performance period. The Company does not intend to pay dividends on its common stock in the foreseeable future. Accordingly, the Company used a dividend yield of zero in its model. The estimated fair value of each award as of the date of grant was $61.01 for the March 2015 grant and $56.94 for the March 2014 grant.

Service Based Stock Units

The Company also awards senior level, certain other employees and new non-employee directors non-vested stock units granted under the 2014 Plan that vest based on service. These non-vested stock unit awards vest 33.33% on each anniversary subsequent to the date of the award. The Company also assumes non-vested stock units in connection with certain of its acquisitions. The assumed awards have the same three year vesting schedule. Each non-vested stock unit, upon vesting, represents the right to receive one share of the Company’s common stock. In addition, the Company awards non-vested stock units to all of its continuing non-employee directors. These awards vest monthly in 12 equal installments based on service and, upon vesting, each stock unit represents the right to receive one share of the Company's common stock.

Unrecognized Compensation Related to Stock Units

As of June 30, 2015, the number of all non-vested stock units outstanding, including market performance and service condition awards and service-based awards, including service-based awards assumed in connection with acquisitions, were 5,142,825. As of June 30, 2015, there was $256.2 million of total unrecognized compensation cost related to non-vested stock units. The unrecognized cost is expected to be recognized over a weighted-average period of 2.17 years. See Note 4 for more information regarding the Company's acquisitions.

Stock Options

Stock options granted under the 2014 Plan typically have a five-year life and vest over three years, with 33.3% of the shares underlying the option vesting on the first anniversary of the date of grant and the remainder of the underlying shares vesting in equal monthly installments at a rate of 2.78% thereafter (the "Standard Vesting Rate"). The Company may assume stock options from certain of its acquisitions for which the vesting period is typically reset to vest over three years at the Standard Vesting Rate. The Company uses the Black-Scholes option pricing model to determine the fair value of stock options. There were no stock options granted or assumed during the three months and six months ended June 30, 2015 and 2014.

The total intrinsic value of options exercised during the three and six months ended June 30, 2015 was $9.9 million and $13.8 million, respectively and the total intrinsic value of options exercised during the three and six months ended June 30, 2014 was $7.2 million and $20.1 million. The intrinsic value is calculated as the difference between the market value on the date of exercise and the exercise price of the shares. As of June 30, 2015, there was $1.0 million of total unrecognized compensation cost related to stock options. That cost is expected to be recognized over a weighted-average period of 0.54 years.