Supplemental Cash Flow Information (Narrative) (Details) (USD $)	0 Months Ended	12 Months Ended
	May 16, 2011	Dec. 29, 2013	Dec. 30, 2012	Dec. 25, 2011
Supplemental Cash Flow Information [Line Items]
Payments for interest		$ 16,300,000	$ 8,700,000	$ 6,700,000
Income taxes		10,800,000	10,800,000	17,900,000
Business acquisition, purchase price	78,700,000
Cash acquired on acquisition	1,900,000
Capital lease assumed	4,200,000	0	0	20,270,000
Capital Expenditures Incurred but Not yet Paid		1,100,000	500,000	2,300,000
New capital lease obligation and related capitalized assets		100,000	27,000	100,000
Purchase Price Funded By Cash [Member]
Supplemental Cash Flow Information [Line Items]
Purchase price, cash	66,700,000
Purchase Price Funded By Senior Secured Credit Facility [Member]
Supplemental Cash Flow Information [Line Items]
Business acquisition, purchase price	$ 9,200,000