Retirement Savings Plan

12 Months Ended

Dec. 31, 2014

Postemployment Benefits [Abstract]

Retirement Savings Plan

15. Retirement Savings Plan

The Company sponsors a defined contribution 401(k) retirement plan (the “401(k) Plan”) covering all employees who meet certain age and service requirements. Employees may contribute a percentage of their eligible compensation into the 401(k) Plan, subject to certain limitations imposed by the Internal Revenue Code. The Company matches employees’ contributions at a rate of 100% of employees’ contributions up to the first 3.0% and 50.0% of the next 2.0% of the employees’ compensation contributed to the 401(k) Plan. The Company’s matching contributions were $2.8 million, $2.5 million and $2.0 million in 2014, 2013 and 2012, respectively.