Accumulated Other Comprehensive Income (Loss) - Components of Other Comprehensive Income (Loss) (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Statement Of Income And Comprehensive Income [Abstract]
Foreign currency translation adjustments, Before Tax	$ 3,270	$ 1,689	$ (1,076)
Adjustments related to postretirement benefits, Before Tax	1,889	362	1,267
Change in unrealized gain/loss on investments, Before Tax	(14)	(16)	(6)
Other comprehensive income, Before Tax	5,145	2,035	185
Foreign currency translation adjustments, Tax (Expense) or Benefit
Adjustments related to postretirement benefits, Tax (Expense) or Benefit	(285)	(240)
Change in unrealized gain/loss on investments, Tax (Expense) or Benefit	8
Other comprehensive income, Tax (Expense) or Benefit	(277)	(240)
Foreign currency translation adjustments, Net-of-Tax	3,270	1,689	(1,076)
Adjustments related to postretirement benefits, Net-of-Tax	1,604	122	1,267
Change in unrealized gain/loss on investments, Net-of-Tax	(6)	(16)	(6)
Other comprehensive income, Net-of-Tax	$ 4,868	$ 1,795	$ 185