XML 50 R18.htm IDEA: XBRL DOCUMENT

Retirement Savings Plan	12 Months Ended
Retirement Savings Plan	Dec. 31, 2017
Postemployment Benefits [Abstract]
RETIREMENT SAVINGS PLAN	RETIREMENT SAVINGS PLAN The Company has a 401(k) retirement savings plan that covers all eligible U.S. employees. Eligible employees may elect to contribute up to 75% of base salary, subject to ERISA limitations. The Company generally makes matching contributions equal to the employee’s contribution up to 4% of the employee’s salary. The Company may also provide an additional contribution based on an eligible employee’s salary. Total plan expenses recognized for the years ended December 31, 2017, 2016, and 2015 were $7.3 million, $5.4 million, and $2.9 million, respectively, due to additional Company contributions. In addition, the Company has a deferred compensation plan for employees whose benefits under the 401(k) plan are limited by federal regulations.