Stockholders' Equity - Additional Information (Detail) - USD ($) $ in Millions							1 Months Ended		3 Months Ended			9 Months Ended
	Jul. 23, 2015	Jul. 08, 2015	Apr. 29, 2015	Apr. 07, 2015	Mar. 27, 2015	Jan. 06, 2015	Nov. 30, 2013	Aug. 31, 2012	Jul. 03, 2015	Jan. 02, 2015	Dec. 27, 2013	Jul. 03, 2015	Jun. 27, 2014	Aug. 31, 2014
January 6, 2015
Shareholders Equity [Line Items]
Common stock repurchased and retired, shares					74,975	419,874
Payment for accelerated share repurchase						$ 45.0
April 7, 2015
Shareholders Equity [Line Items]
Common stock repurchased and retired, shares			151,604	592,280
Payment for accelerated share repurchase				$ 70.0
August 2012 Repurchase Program
Shareholders Equity [Line Items]
Number of shares authorized to be repurchased by VMS Board of Directors								8,000,000
Common stock repurchase period								September 29, 2012 through December 31, 2013
Common stock repurchased and retired, shares											2,000,000
Number of shares remain available for repurchase									0			0
November 2013 Repurchase Program
Shareholders Equity [Line Items]
Number of shares authorized to be repurchased by VMS Board of Directors							6,000,000
Common stock repurchase period							December 30, 2013 through December 31, 2014
Common stock repurchased and retired, shares										250,000			3,250,000
Number of shares remain available for repurchase									0			0
August 2014 Repurchase Program
Shareholders Equity [Line Items]
Number of shares authorized to be repurchased by VMS Board of Directors														6,000,000
Common stock repurchased and retired, shares									1,000,000			3,074,849
Number of shares remain available for repurchase									2,925,151			2,925,151
Subsequent Event | July 8, 2015
Shareholders Equity [Line Items]
Common stock repurchased and retired, shares		418,167
Payment for accelerated share repurchase		$ 45.0
Percent of shares expected to be repurchased that have been repurchased		80.00%
Subsequent Event | July 23, 2015
Shareholders Equity [Line Items]
Common stock repurchased and retired, shares	400,000
Payment for accelerated share repurchase	$ 43.9
Percent of shares expected to be repurchased that have been repurchased	80.00%