XML 32 R18.htm IDEA: XBRL DOCUMENT

Employee Benefit Plan	12 Months Ended
Employee Benefit Plan	Dec. 31, 2017
Compensation and Retirement Disclosure [Abstract]
Employee Benefit Plan	Employee Benefit Plan The Company has a 401(k) Savings Retirement Plan that covers substantially all full-time employees who meet the plan’s eligibility requirements and provides for an employee elective contribution. The Company made matching contributions to the plan of $2.3 million, $2.1 million and $1.7 million for the years ended December 31, 2017, 2016, and 2015, respectively.