Employee Benefits (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Compensation and Retirement Disclosure [Abstract]
Compensation and Employee Benefit Plans [Text Block]	$ 2,400,000
Maximum percentage of annual compensation contributed by the participant (as a percent)	60.00%
Common stock shares remained available for grant (shares)	755,000
Matching contributions to the Vertex 401(k) Plan:
Discretionary matching contributions during the year ended December 31,	5,930,000	10,261,000	8,619,000
Shares issued during the year ended December 31 (shares)	99,000	242,000	183,000
Shares issuable as of the year ended December 31 (shares)	0	53,000	62,000
Contributions by employer	$ 5,000,000