|12 Months Ended|
Dec. 31, 2017
|Defined Contribution Plan [Abstract]|
We maintain a defined contribution plan under Section 401(k) of the Internal Revenue Code of 1986, as amended, that covers substantially all of our employees. Under the provisions of our 401(k) plan, employees' eligible contributions are matched at rates specified in the plan documents. Our expense associated with this plan was approximately $6.2 million, $6.3 million and $4.8 million for the years ended December 31, 2017, 2016, and 2015, respectively.
The entire disclosure for an entity's employee compensation and benefit plans, including, but not limited to, postemployment and postretirement benefit plans, defined benefit pension plans, defined contribution plans, non-qualified and supplemental benefit plans, deferred compensation, share-based compensation, life insurance, severance, health care, unemployment and other benefit plans.
Reference 1: http://www.xbrl.org/2003/role/presentationRef