Stockholders Equity - Additional Information (Detail)	1 Months Ended		3 Months Ended
	Nov. 30, 2013	Aug. 31, 2012	Dec. 27, 2013	Dec. 28, 2012
Shareholders Equity [Line Items]
Common stock repurchased, shares			2,000,000	1,500,000
Number of shares authorized to be repurchased by VMS Board of Directors	6,000,000	8,000,000
Number of shares remain available for repurchase			6,000,000
Common stock repurchase period	December 30, 2013 through December 31, 2014	September 29, 2012 through December 31, 2013