Pension and Other Post-retirement Benefits (Detail) (USD $)	12 Months Ended
	Dec. 29, 2012	Dec. 31, 2011	Jan. 01, 2011
Defined Benefit Plan, Actuarial Gain (Loss)	$ 800,000	$ 1,600,000	$ 1,400,000
Defined Benefit Plan, Effect of One Percentage Point Decrease on Accumulated Postretirement Benefit Obligation	1,000
Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year	400,000
Multiemployer Plans, Collective-Bargaining Arrangement, Percentage of Participants	4.20%
Multiemployer Plans, Plan Contributions	2,900,000	3,300,000	3,300,000
Pension Plans, Defined Benefit [Member]
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Income (Loss) in Next Fiscal Year	919,000
Defined Benefit Plan, Actuarial Gain (Loss)	(4,057,000)	(6,843,000)
Other Postretirement Benefit Plans, Defined Benefit [Member]
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Income (Loss) in Next Fiscal Year	(39,000)
Defined Benefit Plan, Actuarial Gain (Loss)	$ 135,000	$ 67,000
Group Annuity Contract [Member]
Percentage of Allocation, Assets (in Shares)	0.50
Debt and Equity Securities [Member]
Percentage of Allocation, Assets (in Shares)	0.50