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Employee Benefits	12 Months Ended
Employee Benefits	Dec. 31, 2018
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. The Company pays matching contributions in the form of cash. For the years ended December 31, 2018, 2017 and 2016, the Company contributed approximately $13.9 million, $12.3 million and $11.8 million to the plan, respectively.