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Retirement Savings Plan	6 Months Ended
Retirement Savings Plan	Jun. 30, 2015
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. In addition, the Company has a deferred compensation plan for employees whose benefits under the 401(k) plan are limited by federal regulations. The Company makes matching contributions equal to 100% of the employee’s contribution up to 4% of the employee's salary. The Company may also provide a voluntary, noncontributory defined contribution based on an eligible employee's salary. Company contributions for the three and six months ended June 30, 2015 and 2014 were $1.6 million and $1.6 million and $3.2 million and $3.0 million, respectively.