Employee Benefits (Tables)

12 Months Ended

Dec. 31, 2015

Compensation and Retirement Disclosure [Abstract]

Matching contributions to the Vertex 401(k) Plan

In 2013, the Company declared matching contributions paid in fully-vested interests in the Vertex common stock fund to the Vertex 401(k) Plan as follows:

	2013
	(in thousands)
Discretionary matching contributions during the year ended December 31, 2013	$	5,930
Shares issued during the year ended December 31, 2013	99
Shares issuable as of the year ended December 31, 2013	—