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Employee Benefits	12 Months Ended
Employee Benefits	Dec. 31, 2017
Retirement Benefits [Abstract]
Employee Benefits	Employee Benefits The Company has a 401(k) retirement plan (the “Vertex 401(k) Plan”) in which substantially all of its permanent U.S. employees are eligible to participate. Participants may contribute up to 60% of their annual compensation to the Vertex 401(k) Plan, subject to statutory limitations. The Company may declare discretionary matching contributions to the Vertex 401(k) Plan. Beginning in mid-2013, the Company began paying matching contributions in the form of cash. For the years ended December 31, 2017, 2016 and 2015, the Company contributed approximately $12.3 million, $11.8 million and $12.8 million to the plan, respectively. As of December 31, 2017, 754,744 shares of common stock remained available for grant under the Vertex 401(k) Plan.