Accumulated Other Comprehensive Income (Loss) - Components of Accumulated Other Comprehensive Income (Loss) (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 29, 2012	Dec. 31, 2011	Dec. 25, 2010
Accumulated Other Comprehensive Income Loss [Line Items]
Foreign currency translation adjustments, Before Tax	$ 1,689	$ (1,076)	$ (7,270)
Adjustments related to postretirement benefits, Before Tax	362	1,267	(1,386)
Change in unrealized gain/loss on investments, Before Tax	(16)	(6)	(134)
Other Comprehensive Income (Loss), Before Tax	2,035	185	(8,790)
Foreign currency translation adjustments, Tax (Expense) or Benefit
Adjustments related to postretirement benefits, Tax (Expense) or Benefit	(240)		(120)
Change in unrealized gain/loss on investments, Tax (Expense) or Benefit			51
Other Comprehensive Income (Loss), Tax (Expense) or Benefit	(240)		(69)
Foreign currency translation adjustments, Net-of-Tax	1,689	(1,076)	(7,270)
Adjustments related to postretirement benefits, Net-of-Tax	122	1,267	(1,506)
Change in unrealized gain/loss on investments, Net-of-Tax	(16)	(6)	(83)
Other Comprehensive Income (Loss), Net-of-Tax	$ 1,795	$ 185	$ (8,859)