Note 15.

Retirement Plans

We have a 401(k) Plan for all U.S. eligible employees. Each eligible employee can contribute a portion of their salary, limited by certain Federal regulations. Beginning in 2008, we matched 100% of employee contributions on eligible compensation, up to a maximum of 4% each pay period; our contribution vests immediately. Eligible compensation consisted of gross base salary and annual bonus. In addition, we have the discretion of contributing up to 4% of eligible compensation to each eligible employee’s 401(k) plan irrespective of the employees’ contribution amount, which also vests immediately. Our Company will make a discretionary matching contribution of 3% or $1.6 million for the year ended December 31, 2014. Our Company made a discretionary matching contribution of 2% or $0.8 million for the year ended December 31, 2013. There was no discretionary matching contributions for the year ended 2012.

We sponsored a standalone retirement savings defined contribution plan covering substantially all of our Company’s U.S. employees through December 31, 2011. The standalone retirement savings defined contribution plan was merged into the 401(k) Plan effective January 1, 2012. Company contributions were equal to 7.5% of each eligible employee’s eligible compensation up to the amount permitted by certain Federal regulations. For 2014, 2013 and 2012 eligible compensation consisted solely of gross base salary. Our Company’s contributions vest at 20% per year for six years with vesting beginning in an employee’s second year of service. For any employee hired prior to January 1, 2008, vesting is calculated based on hours of service and vesting commences on January 1 following an employee’s first full year of service. For employees hired after January 1, 2008, vesting is calculated based on elapsed time and vesting commences on the employees anniversary date.

The expense recorded for all contributions to the 401(k) Plan for the year ended December 31, 2014 was $7.5 million, consisting of $3.8 million for the retirement savings contributions, $2.1 million for the non-discretionary matching contributions, and $1.6 million for the discretionary matching contribution. The expense recorded for all contributions to the 401(k) Plan for the year ended December 31, 2013 was $5.1 million, consisting of $2.7 million for the retirement savings contributions, $1.6 million for the non-discretionary matching contributions, and $0.8 million for the discretionary matching contribution. The expense recorded for all contributions to the 401(k) Plan for the year ended December 31, 2012 was $4.6 million, consisting of $2.5 million for the retirement savings contributions and $2.1 million for the non-discretionary matching contributions.

Our Company sponsors a defined contribution plan for our Company’s U.K. employees under U.K. regulations. Contributions, which are fully vested when made, are equal to 15% of each eligible employee’s gross base salary for all U.K. employees hired prior to November 2014 and 12% for all employees hired after November 2014. All U.K. employees are eligible on their date of hire. The expense recorded for the U.K. defined contribution plan was $2.6 million, $2.2 million and $1.9 million for the years ended December 31, 2014, 2013 and 2012, respectively. Such expenses are included in Other operating expenses.