Postretirement Benefits - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 28, 2013 Age	Dec. 29, 2012	Dec. 31, 2011
Postemployment Benefits [Abstract]
Years of service that employees were required to have as of October 1, 2001 in order to qualify for postretirement benefits in the future	5 years
Age plus years of service that employees were required to have as of October 1, 2001 in order to qualify for postretirement benefits in the future	65
Minimum age that eligible employees are required to have in order to receive post retirement benefits	55
Minimum years of service that eligible employees are required to have in order to receive post retirement benefits	10 years
Benefit payments	$ 3,769	$ 3,785	$ 3,146
Accumulation of losses, maximum percentage threshold to amortize actuarial losses	10.00%