Mergers and Acquisitions (Details) (USD $)	3 Months Ended				12 Months Ended
	Jan. 02, 2011 BPR, Inc. Y	Jan. 01, 2012 BPR, Inc.	Oct. 02, 2011 BPR, Inc.	Oct. 05, 2010 BPR, Inc.	Oct. 02, 2011 2011 acquisitions
Business acquisition
Aggregate purchase price				$ 185,679,000	$ 100,000,000
Period for contingent earn-out payments (in years)	2				2
Estimated fair values of the assets acquired and liabilities assumed
Current assets				77,698,000
Property and equipment				7,178,000
Goodwill				128,140,000
Intangible and other assets				36,988,000
Current liabilities				(42,481,000)
Long-term deferred taxes				(9,622,000)
Noncontrolling interests				(12,222,000)
Net assets acquired				185,679,000	100,000,000
Contingent consideration accrued as part of Estimated contingent earn-out liabilities		54,500,000	64,100,000
Contingent consideration accrued as part of Other long-term liabilities		$ 11,400,000	$ 11,000,000