Post-Retirement Plans (Narrative) (Details) (USD $)	4 Months Ended
	Apr. 21, 2012	Apr. 23, 2011
Post-Retirement Plans [Abstract]
Cash contributions to company pension plans	$ 12,055,000	$ 580,000
Expected cash contributions to company pension plans, current fiscal year	6,100,000
Total cost and employer contributions	$ 6,500,000	$ 6,000,000
Date of acquisition	May 20, 2011