Operating (Gains), Losses and Other Charges, Net (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 24, 2014	Sep. 25, 2013	Sep. 24, 2014		Sep. 25, 2013
Other Income and Expenses [Abstract]
(Gains) losses on sales of assets and other, net	$ (33)	$ (68)	$ (74)		$ (83)
Restructuring charges and exit costs	300	229	775		1,005
Impairment charges	320	0	348		857
Operating (gains), losses and other charges, net	587	161	1,049		1,779
Restructuring Charges [Abstract]
Exit costs	291	198	380	[1]	435
Severance and other restructuring charges	9	31	395		570
Total restructuring charges and exit costs	300	229	775		1,005
Restructuring Reserve [Roll Forward]
Balance, December 25, 2013			3,149
Exit costs (1)	291	198	380	[1]	435
Payments, net of sublease receipts			(1,050)
Reclassification of certain lease assets and liabilities, net			(95)
Interest accretion			141
Balance, September 24, 2014	2,525		2,525
Less current portion included in other current liabilities	914		914
Long-term portion included in other noncurrent liabilities	$ 1,611		$ 1,611

[1] Included as a component of operating (gains), losses and other charges, net.