Supplemental Cash Flow Information (Details) (USD $)	0 Months Ended	6 Months Ended
	May 16, 2011	Jun. 24, 2012	Jun. 26, 2011	Sep. 25, 2011
Supplemental Cash Flow Information [Abstract]
Interest		$ 3,273,000	$ 2,895,000
Income tax payments		3,659,000	4,819,000
Finite-Lived Intangible Assets [Line Items]
Business acquisition, purchase price	78,700,000
Cash acquired on acquisition	1,900,000
Business acquisition, contingent consideration, potential cash payment		17,500,000		27,800,000
Assumption of debt	4,200,000
Purchase Price Funded By Cash [Member]
Finite-Lived Intangible Assets [Line Items]
Business acquisition, purchase price	66,700,000
Purchase Price Funded By Senior Secured Credit Facility [Member]
Finite-Lived Intangible Assets [Line Items]
Business acquisition, purchase price	$ 9,200,000