Other (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 23, 2012	Mar. 25, 2012	Sep. 25, 2011	Jun. 26, 2011	Sep. 23, 2012	Sep. 25, 2011
Other Income and Expenses [Abstract]
Severance costs	$ 3,008				$ 10,128
Severance liability	12,000				12,000
Accelerated depreciation		6,700
Impairment of assets	0		0	9,225	0	9,225
Other intangible assets acquired				$ 0