Business Combinations - Additional Information (Detail) - USD ($) shares in Thousands, $ in Thousands	1 Months Ended					12 Months Ended
	Sep. 30, 2015	Aug. 31, 2015	Apr. 30, 2015	Jul. 31, 2014	Apr. 30, 2014	Oct. 02, 2015	Sep. 26, 2014	Sep. 27, 2013
Business Acquisition [Line Items]
Goodwill acquired						$ 283,452	$ 240,626	$ 225,300
Common stock, shares outstanding (in shares)						98,070	100,942
Other payments						$ 3,300	$ 700
Karl Otto
Business Acquisition [Line Items]
Cash consideration	$ 27,000
Goodwill acquired	9,900
Amortizable intangible assets acquired	$ 8,300
Claymount Investments B.V.
Business Acquisition [Line Items]
Cash and cash equivalents		$ 1,900
Cash consideration		58,000
Goodwill acquired		30,500
Amortizable intangible assets acquired		$ 16,200
Mevis
Business Acquisition [Line Items]
Cash and cash equivalents			$ 13,900
Cash consideration			25,500
Goodwill acquired			8,200
Amortizable intangible assets acquired			$ 5,800
Percentage of voting interests acquired			73.50%
Transpire Inc
Business Acquisition [Line Items]
Total purchase price				$ 19,300
Cash consideration				16,000
Goodwill acquired				8,700
Amortizable intangible assets acquired				8,700
Liabilities incurred			$ 3,300
Velocity Medical Solutions LLC
Business Acquisition [Line Items]
Total purchase price					$ 19,900
Cash consideration					17,000
Goodwill acquired					9,800
Amortizable intangible assets acquired					10,600
Cash consideration held back					$ 2,600
Liabilities incurred			$ 2,900
Noncontrolling Interests | Mevis
Business Acquisition [Line Items]
Common stock, shares outstanding (in shares)						482
Noncontrolling interest (as a percent)						26.50%
Oncology Systems
Business Acquisition [Line Items]
Goodwill acquired						$ 158,800	$ 148,300	$ 132,000
Oncology Systems | Transpire Inc
Business Acquisition [Line Items]
Goodwill acquired				5,900
Amortizable intangible assets acquired				6,000
Security and Inspection Products Reporting Unit | Transpire Inc
Business Acquisition [Line Items]
Goodwill acquired				2,800
Amortizable intangible assets acquired				$ 2,700