Reconciliation of Changes in Benefit Obligation and Fair Value of Plan Assets and Unfunded Status of Plan (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Change in benefit obligation:
Service cost	$ 114	$ 148	$ 163
Interest cost	4,521	4,866	5,301
Benefit payments	(3,769)	(3,785)	(3,146)
Change in fair value of plan assets:
Benefit payments	(3,769)	(3,785)	(3,146)
Current liability	4,561	4,300
Noncurrent liability	102,763	116,721
Total recognized liability	107,324	121,021
Change in Benefit Obligation
Change in benefit obligation:
Benefit obligation as of beginning of year	121,021	107,624
Service cost	114	148
Interest cost	4,521	4,866
Actuarial (gain) loss	(14,563)	12,168
Benefit payments	(3,769)	(3,785)
Benefit obligation as of end of year	107,324	121,021
Change in fair value of plan assets:
Benefit payments	(3,769)	(3,785)
Change in Fair Value of Plan Assets
Change in benefit obligation:
Benefit payments	(3,769)	(3,785)
Change in fair value of plan assets:
Fair value of plan assets as of beginning of year	0	0
Employer contributions	3,769	3,785
Benefit payments	(3,769)	(3,785)
Fair value of plan assets as of end of year	0	0
Unfunded status of the plan as of end of year	$ 107,324	$ 121,021