Prior Period Adjustments - Narrative (Details) (USD $)	3 Months Ended
	Jun. 30, 2013 Benefit_Plan_Participants	Mar. 31, 2013	Dec. 30, 2012	Sep. 23, 2012	Jun. 24, 2012	Mar. 25, 2012	Dec. 25, 2011	Dec. 26, 2010
Participants in the pension plan	800
Retained earnings	$ 1,254,155,000	$ 1,234,023,000	$ 1,230,450,000	$ 1,052,327,000	$ 1,049,580,000	$ 1,137,203,000	$ 1,094,603,000	$ 6,000,000
Accumulated other comprehensive loss, net of income taxes	(505,040,000)	(509,938,000)	(512,567,000)	(495,184,000)	(499,375,000)	(496,702,000)	(497,058,000)	14,500,000
Valuation of Accrued Benefits [Member]
Defined benefit plan, overstated		$ 50,900,000	$ 50,400,000