Debt (Details) (USD $)			12 Months Ended		0 Months Ended
	Mar. 30, 2013	Dec. 29, 2012	Dec. 29, 2012 Senior credit agreement	Mar. 30, 2013 Senior credit agreement	Jun. 29, 2012 Revolving credit facility	Mar. 30, 2013 Revolving credit facility M	Dec. 29, 2012 Revolving credit facility	Mar. 30, 2013 Term loan facility	Dec. 29, 2012 Term loan facility	Mar. 30, 2013 7.5% senior notes	Dec. 29, 2012 7.5% senior notes
Debt
Revolving credit facility						$ 10,000,000	$ 35,000,000
Long-term debt including current maturities	663,750,000	696,250,000	331,250,000	298,750,000				288,750,000	296,250,000	365,000,000	365,000,000
Less current maturities	25,000,000	50,000,000
Long-term debt	638,750,000	646,250,000
Debt instrument, interest rate (as a percent)										7.50%	7.50%
Maximum borrowing capacity						150,000,000
Amount borrowed during the period					50,000,000
Debt instrument, face amount								300,000,000
Loan acquisition costs			6,228,000
Write-off of unamortized loan acquisition costs			2,478,000
Available borrowing capacity						$ 140,000,000
Planned repayment period for revolving credit facility (in months)						12